Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ L. . Hellmann [et al.] // J. Geophys. Res.-Biogeosci. - 2013. - Vol. 118, Is. 1. - P68-76, DOI 10.1002/jgrg.20022. - Cited References: 76. - B. Sittler, B. Frauenberger, C. Lachenmeier, I. Pike, A. Verstege, D. Nievergelt, H. Linderson, and B. Held contributed to field and laboratory work. A. Bast and C. Ginzler provided insight on various mapping techniques. G. King and two anonymous reviewers commented on earlier manuscript versions. This work is supported by the Eva Mayr-Stihl Foundation. . - 9. - ISSN 0148-0227РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Arctic environments, where surface temperatures increase and sea ice cover and permafrost depth decrease, are very sensitive to even slight climatic variations. Placing recent environmental change of the high-northern latitudes in a long-term context is, however, complicated by too short meteorological observations and too few proxy records. Driftwood may represent a unique cross-disciplinary archive at the interface of marine and terrestrial processes. Here, we introduce 1445 driftwood remains from coastal East Greenland and Svalbard. Macroscopy and microscopy were applied for wood anatomical classification; a multi-species subset was used for detecting fungi; and information on boreal vegetation patterns, circumpolar river systems, and ocean current dynamics was reviewed and evaluated. Four conifer (Pinus, Larix, Picea, and Abies) and three deciduous (Populus, Salix, and Betula) genera were differentiated. Species-specific identification also separated Pinus sylvestris and Pinus sibirica, which account for similar to 40% of all driftwood and predominantly originate from western and central Siberia. Larch and spruce from Siberia or North America represents similar to 26% and similar to 18% of all materials, respectively. Fungal colonization caused different levels of driftwood staining and/or decay. Our results demonstrate the importance of combining wood anatomical knowledge with insight on boreal forest composition for successfully tracing the origin of Arctic driftwood. To ultimately reconstruct spatiotemporal variations in ocean currents, and to better quantify postglacial uplift rates, we recommend consideration of dendrochronologically dated material from many more circumpolar sites. Citation: Hellmann, L., W. Tegel, O. Eggertsson, F. H. Schweingruber, R. Blanchette, A. Kirdyanov, H. Gartner, and U. Buntgen (2013), Tracing the origin of Arctic driftwood, J. Geophys. Res. Biogeosci., 118, 68-76, doi:10.1002/jgrg.20022.

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Держатели документа:
[Hellmann, Lena
Schweingruber, Fritz Hans
Gaertner, Holger
Buentgen, Ulf] Swiss Fed Res Inst, WSL, CH-8903 Birmensdorf, Switzerland
[Hellmann, Lena
Buentgen, Ulf] Oeschger Ctr Climate Change Res, Bern, Switzerland
[Tegel, Willy] Univ Freiburg, Inst Forest Growth IWW, D-79106 Freiburg, Germany
[Eggertsson, Olafur] Iceland Forest Serv, Reykjavik, Iceland
[Blanchette, Robert] Univ Minnesota, Dept Plant Pathol, St Paul, MN USA
[Kirdyanov, Alexander] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Hellmann, L...; Tegel, W...; Eggertsson, O...; Schweingruber, F.H.; Blanchette, R...; Kirdyanov, A...; Gartner, H...; Buntgen, U...

/ E. D. Schulze [et al.] // Biogeosciences. - 2012. - Vol. 9, Is. 4. - P1405-1421, DOI 10.5194/bg-9-1405-2012. - Cited References: 39. - We thank Annett Borner for her help with the artwork, and Dominik Hessenmoller for his help. We also thank Inge Schulze for all her support during the fieldwork. The data processing was supported by the Russian "Megagrant" 11.G34.31.0014 from 30 November 2010 to E. D. Schulze by the Russian Federation and the Siberian Federal University to support research projects by leading scientists at Russian Institutions of higher Education. . - 17. - ISSN 1726-4170РУБ Ecology + Geosciences, Multidisciplinary

Аннотация: The relative role of fire and of climate in determining canopy species composition and aboveground carbon stocks were investigated. Measurements were made along a transect extending from the dark taiga zone of central Siberia, where Picea and Abies dominate the canopy, into the Larix zone of eastern Siberia. We test the hypotheses that the change in canopy species composition is based (1) on climate-driven performance only, (2) on fire only, or (3) on fire-performance interactions. We show that the evergreen conifers Picea obovata and Abies sibirica are the natural late-successional species both in central and eastern Siberia, provided there has been no fire for an extended period of time. There are no changes in performance of the observed species along the transect. Fire appears to be the main factor explaining the dominance of Larix and of soil carbon. Of lesser influence were longitude as a proxy for climate, local hydrology and active-layer thickness. We can only partially explain fire return frequency, which is not only related to climate and land cover, but also to human behavior. Stand-replacing fires decreased from 300 to 50 yrs between the Yenisei Ridge and the upper Tunguska. Repeated non-stand-replacing surface fires eliminated the regeneration of Abies and Picea. With every 100 yrs since the last fire, the percentage of Larix decreased by 20%. Biomass of stems of single trees did not show signs of age-related decline. Relative diameter increment was 0.41 +/- 0.20% at breast height and stem volume increased linearly over time with a rate of about 0.36 t C ha(-1) yr(-1) independent of age class and species. Stand biomass reached about 130 t C ha(-1)(equivalent to about 520 m(3) ha(-1)). Individual trees of Larix were older than 600 yrs. The maximum age and biomass seemed to be limited by fungal rot of heart wood. 60% of old Larix and Picea and 30% of Pinus sibirica trees were affected by stem rot. Implications for the future role of fire and of plant diseases are discussed.

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Держатели документа:
[Schulze, E. -D.
Mollicone, D.
Ziegler, W.] Max Planck Inst Biogeochem, D-07701 Jena, Germany
[Wirth, C.] Univ Leipzig, Inst Biol, D-04103 Leipzig, Germany
[Mollicone, D.
Achard, F.] Joint Res Ctr, Inst Environm & Sustainabil, I-21027 Ispra, Italy
[von Luepke, N.
Mund, M.] Univ Gottingen, Dept Ecoinformat Bioemetr & Forest Growth, D-37077 Gottingen, Germany
[Prokushkin, A.] SB RAS, VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Scherbina, S.] Centralno Sibirsky Nat Reserve, Bor, Russia

Доп.точки доступа:
Schulze, E.D.; Wirth, C...; Mollicone, D...; von Lupke, N...; Ziegler, W...; Achard, F...; Mund, M...; Prokushkin, A...; Scherbina, S...

[Text] / J. . Esper [et al.] // Glob. Change Biol. - 2010. - Vol. 16, Is. 1. - P386-398, DOI 10.1111/j.1365-2486.2009.01913.x. - Cited References: 70. - We thank F. H. Schweingruber for stimulating discussions. Supported by the European Community project Millennium (grant 017008) and the Swiss National Science Foundation through the National Centre for Competence in Climate Research (NCCR-Climate). . - 13. - ISSN 1354-1013РУБ Biodiversity Conservation + Ecology + Environmental Sciences

Аннотация: Estimates of past climate and future forest biomass dynamics are constrained by uncertainties in the relationships between growth and climatic variability and uncertainties in the instrumental data themselves. Of particular interest in this regard is the boreal-forest zone, where radial growth has historically been closely connected with temperature variability, but various lines of evidence have indicated a decoupling since about the 1960s. We here address this growth-vs.-temperature divergence by analyzing tree-ring width and density data from across Siberia, and comparing 20th century proxy trends with those derived from instrumental stations. We test the influence of approaches considered in the recent literature on the divergence phenomenon (DP), including effects of tree-ring standardization and calibration period, and explore instrumental uncertainties by employing both adjusted and nonadjusted temperature data to assess growth-climate agreement. Results indicate that common methodological and data usage decisions alter 20th century growth and temperature trends in a way that can easily explain the post-1960 DP. We show that (i) Siberian station temperature adjustments were up to 1.3 degrees C for decadal means before 1940, (ii) tree-ring detrending effects in the order of 0.6-0.8 degrees C, and (iii) calibration uncertainties up to about 0.4 degrees C over the past 110 years. Despite these large uncertainties, instrumental and tree growth estimates for the entire 20th century warming interval match each other, to a degree previously not recognized, when care is taken to preserve long-term trends in the tree-ring data. We further show that careful examination of early temperature data and calibration of proxy timeseries over the full period of overlap with instrumental data are both necessary to properly estimate 20th century long-term changes and to avoid erroneous detection of post-1960 divergence.

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Держатели документа:
[Esper, Jan
Frank, David
Buentgen, Ulf
Verstege, Anne] Swiss Fed Res Inst, WSL, CH-8903 Birmensdorf, Switzerland
[Esper, Jan] Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland
[Hantemirov, Rashit M.] Russian Acad Sci, Lab Dendrochronol, Inst Plant & Anim Ecol, Ural Branch, Ekaterinburg 620144, Russia
[Kirdyanov, Alexander V.] RAS, VN Sukachev Inst Forest SB, Krasnoyarsk 660036, Akademgorodok, Russia

Доп.точки доступа:
Esper, J...; Frank, D...; Buntgen, U...; Verstege, A...; Hantemirov, R.M.; Kirdyanov, A.V.

[Text] / M. . Mund [et al.] // Tree Physiol. - 2010. - Vol. 30, Is. 6. - P689-704, DOI 10.1093/treephys/tpq027. - Cited References: 80. - Integrated project CarboEurope-IP, European Commission, Directorate-General Research, Sixth Framework Programme, Priority 1.1.6.3: Global Change and Ecosystem (Contract No. GOCE-CT-2003-505572); Max-Planck-Institute for Biogeochemistry, Jena, Germany. . - 16. - ISSN 0829-318XРУБ Forestry

Аннотация: The periodic production of large seed crops by trees (masting) and its interaction with stern growth has long been the objective of tree physiology research. However, very little is known about the effects of masting on stern growth and total net primary productivity (NPP) at the stand scale. This study was conducted in an old-growth, mixed deciduous forest dominated by Fagus sylvatica (L.) and covers the period from 2003 to 2007, which comprised wet, dry and regular years as well as two masts of Fagus and one mast of the co-dominant tree species Fraxinus excelsior (L.) and Acer pseudoplatanus (L.). We combined analyses of weather conditions and stem growth at the tree level (inter- and intra-annual) with fruit, stem and leaf production, and estimates of total NPP at the stand level. Finally, we compared the annual demand of carbon for biomass production with net canopy assimilation (NCA), derived from eddy covariance flux measurements, chamber measurements and modelling. Annual stem growth of Fagus was most favoured by warm periods in spring and that of Fraxinus by high precipitation in June. For stem growth of Acer and for fruit production, no significant relationships with mean weather conditions were found. Intra-annual stem growth of all species was strongly reduced when the relative plant-available water in soil dropped below a threshold of about 60% between May and July. The inter-annual variations of NCA, total NPP and leaf NPP at the stand level were low (mean values 1313, 662 and 168 g C m(-2) year(-1), respectively), while wood and fruit production varied more and contrarily (wood: 169-241 g C m(-2) year(-1); fruits: 21-142 g C m(-2) year(-1)). In all years, an annual surplus of newly assimilated carbon was calculated (on average 100 g C m(-2) year(-1)). The results suggest that stem growth is generally not limited by insufficient carbon resources; only in mast years a short-term carbon shortage may occur in spring. In contrast to common assumption, stem growth alone is not a sufficient proxy for total biomass production or the control of carbon sequestration by weather extremes.

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Держатели документа:
[Mund, M.
Wirth, C.
Schulze, E. -D.] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kutsch, W. L.] Inst Agr Climate Res, Johann Heinrich von Thunen Inst, D-38116 Braunschweig, Germany
[Kahl, T.] Univ Freiburg, Inst Silviculture, D-79085 Freiburg, Germany
[Knohl, A.] ETH, Inst Plant Sci, CH-8092 Zurich, Switzerland
[Knohl, A.] Univ Gottingen, Busgen Inst, D-37077 Gottingen, Germany
[Skomarkova, M. V.] Inst Forest SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Mund, M...; Kutsch, W.L.; Wirth, C...; Kahl, T...; Knohl, A...; Skomarkova, M.V.; Schulze, E.D.

[Text] / K. R. Briffa [et al.] // Nature. - 1998. - Vol. 391, Is. 6668. - P678-682, DOI 10.1038/35596. - Cited References: 30 . - 5. - ISSN 0028-0836РУБ Multidisciplinary Sciences

Аннотация: Tree-ring chronologies that represent annual changes in the density of wood formed during the late summer can provide a proxy for local summertime air temperature(1). Here we undertake an examination of large-regional-scale wood-density/air-temperature relationships using measurements from hundreds of sites at high latitudes in the Northern Hemisphere. When averaged over large areas of northern America and Eurasia, tree-ring density series display a strong coherence with summer temperature measurements averaged over the same areas, demonstrating the ability of this proxy to portray mean temperature changes over sub-continents and even the whole Northern Hemisphere. During the second half of the twentieth century, the decadal-scale trends in wood density and summer temperatures have increasingly diverged as wood density has progressively fallen. The cause of this increasing insensitivity of wood density to temperature changes is not known, but if it is not taken into account in dendroclimatic reconstructions, past temperatures could be overestimated. Moreover, the recent reduction in the response of trees to air-temperature changes would mean that estimates of future atmospheric CO2 concentrations, based on carbon-cycle models that are uniformly sensitive to high-latitude warming, could be too low.

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Держатели документа:
Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland
Russian Acad Sci, Inst Plant & Anim Ecol, Ural Branch, Ekaterinburg 620219, Russia
Russian Acad Sci, Inst Forest, Siberian Branch, Krasnoyarsk, Russia

Доп.точки доступа:
Briffa, K.R.; Schweingruber, F.H.; Jones, P.D.; Osborn, T.J.; Shiyatov, S.G.; Vaganov, E.A.

[Text] / K. J. Anchukaitis [et al.] // Geophys. Res. Lett. - 2006. - Vol. 33, Is. 4. - Ст. L04705, DOI 10.1029/2005GL025050. - Cited References: 29 . - 4. - ISSN 0094-8276РУБ Geosciences, Multidisciplinary

Аннотация: We use a mechanistic model of tree-ring formation to simulate regional patterns of climate-tree growth relationships in the southeastern United States. Modeled chronologies are consistent with actual tree-ring data, demonstrating that our simulations have skill in reproducing broad-scale patterns of the proxy's response to climate variability. The model predicts that a decrease in summer precipitation, associated with a weakening Bermuda High, has become an additional control on tree ring growth during recent decades. A nonlinear response of tree growth to climate variability has implications for the calibration of tree-ring records for paleoclimate reconstructions and the prediction of ecosystem responses to climate change.

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Держатели документа:
Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA
Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA
Russian Acad Sci, Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Anchukaitis, K.J.; Evans, M.N.; Kaplan, A...; Vaganov, E.A.; Hughes, M.K.; Grissino-Mayer, H.D.; Cane, M.A.

/ A. Darin [et al.] // 10th International Multidisciplinary Scientific Geoconference and EXPO - Modern Management of Mine Producing, Geology and Environmental Protection, SGEM 2010. - 2010. - Vol. 1: 10th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2010 (20 June 2010 through 26 June 2010, Varna) Conference code: 101583. - P55-60 . -
Аннотация: Reconstruction of climate change in Central Asia over the last millennium with an annual resolution was made using geochemical and biological proxy in lake bottom sediments and tree-ring data. We investigated the lake in Central Asia- Teletskoe (Altai), Kucherla (Altai), Baikal, Arahlei (Chita) - and adjacent areas. Cores of bottom sediments were investigated by method of scanning X-ray fluorescent analysis with synchrotron radiation with the spatial resolution of 0.1 mm. It corresponds to the time resolution ~ 0.2-0.5 year. At each point analyzed more than 30 trace elements from K to U. Geochemical proxy of terrigenous, organogenous and aerosol components of sediments well correlated with regional meteodata for the last 100-150 years. Time series of lithological-geochemical indicators of climate change based on dating by 14C, 137Cs and 210Pb was calibrated by instrumental hydrometeorological data. We used tree-ring series together with element contents as an additional proxy for calculation of transfer function, considering that tree-ring series are response to summer temperature in this climatic zone. Annual temperature and precipitation change for the Central Asia region (0 - 1000 years ago) have been reconstructed using the transfer functions such as: time series proxy=function (temperature, precipitation).

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Держатели документа:
Institute of geology and mineralogy SB RAS, Novosibirsk, Russian Federation
Institute of Forest SB RAS, Krasnoyarsk, Russian Federation
Institute of Earth Crust SB RAS, Irkutsk, Russian Federation
Institute of Archeology and Ethnography SB RAS, Novosibirsk, Russian Federation
Institute of Natural Resources, Ecology and Cryology SB RAS, Chita, Russian Federation
Budker Institute of nuclear physics SB RAS, Novosibirsk, Russian Federation
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Доп.точки доступа:
Darin, A.; Kalugin, I.; Maksimova, N.; Ovchinnikov, D.; Vologina, E.; Rudaya, N.; Ptitsyn, A.; Reshetova, S.; Rakshun, Y.; Zolotarev, K.

/ M. M. Naurzbaev, E. A. Vaganov, O. V. Sidorova // Earth's Cryosphere. - 2003. - Vol. 7, Is. 2. - С. 84-91 . - ISSN 1560-7496
Аннотация: An integral estimation of tree-ring growth spatial-temporal conjugation was carried out based on tree-ring chronology network of subarctic zone of Siberia, Ural and Scandinavia for the last 2000 years. Phase and amplitude disagreements of the annual growth and its decadal fluctuation in different subarctic sectors of Eurasia are changed by synchronous fluctuation when century and longer growth cycles are considered. Long-term changes of radial growth indicate common character of global climatic changes in subarctic zone of Eurasia. Medieval warming occurred from 10 to 12 centuries and 15-century warming were changed by Little Ice Age with the cooling culmination taking place in the 17 century. Current warming which started at the beginning of the 19th-century for the moment does not exceed the amplitude of the medieval warming. The tree-ring chronologies do not indicate unusually abrupt temperature rise during the last century, which could be reliably associated with greenhouse gas increasing in the atmosphere of our planet. Modem period is characterized by heterogeneity of warming effect in subarctic regions of Eurasia. Integral tree-ring chronology of the Northern Eurasia shows well agreement with 18O fluctuations in the ice core obtained for Greenland (GISP2). В© M.M. Naurzbaev, E.A. Vaganov, O.V. Sidorova, 2003.

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Держатели документа:
V.N. Sukachev Institute of Forest, SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russian Federation

Доп.точки доступа:
Naurzbaev, M.M.; Vaganov, E.A.; Sidorova, O.V.

/ T. T. Efremova [и др.] // Izv. Akad. Nauk Ser. Geogr. - 2003. - Is. 3. - С. 36-43 . - ISSN 0373-2444
Аннотация: Na, Br, Cs, Ca, Mg, Ba, Cl and Br distribution along the profile of peatland in the process of peat accumulation is regulated by the climatic fluctuation during Holocene. The possibility of using this information for paleoclimate reconstruction has been shown. In all probability it can be considered as the biochemical migration of alkali-earth and alkaline metals in the process of peat formation reflects mainly climatic fluctuations, connected with temperature, and halogens - with moistening factor.

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Держатели документа:
Institute of Forest, Siberian Branch RAS, Novosibirsk, Russian Federation
Inst. of Chem. Kinetics/Combustion, Siberian Branch RAS, Novosibirsk, Russian Federation
United Institute of Nuclear Studies, Moscow, Russian Federation

Доп.точки доступа:
Efremova, T.T.; Efremov, S.P.; Kutzenogy, K.P.; Peresedov, V.F.

[Text] / U. . Buntgen [et al.] // Holocene. - 2014. - Vol. 24, Is. 5. - P627-630, DOI 10.1177/0959683614523805. - Cited References: 23. - This study is part of the ongoing 'Arctic driftwood' project funded by WSL and the Eva Mayr-Stihl Foundation. The Russian NorthEastern Federal University in Yakutsk and the Russian Foundation for Basic Research (RFBR-12-04-00542), as well as the interdisciplinary projects from SB RAS, provided additional financial and logistical support. UB was supported by the Operational Programme of Education for Competitiveness of Ministry of Education, Youth and Sports of the Czech Republic (project: 'Building Up a Multidisciplinary Scientific Team Focussed on Drought', no. CZ.1.07/2.3.00/20.0248). . - ISSN 0959-6836. - ISSN 1477-0911РУБ Geography, Physical + Geosciences, Multidisciplinary

Аннотация: Today, there are only a handful of millennial-long and annually resolved tree-ring chronologies in existence. Explicit gaps in the global distribution of these regional chronologies together with an overall declining sample size back in time compel a community-wide challenge to discover new tree ring-based climate proxy records. Here, we present evidence for a yet unexplored palaeoenvironmental archive, define allied research tasks and emphasize probable hurdles within and beyond academia, in pursuit of answering this challenge.

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Держатели документа:
[Buentgen, Ulf
Hellmann, Lena] Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland
[Buentgen, Ulf
Hellmann, Lena] Oeschger Ctr Climate Change Res OCCR, Bern, Switzerland
[Buentgen, Ulf] Global Change Res Ctr AS CR, Brno, Czech Republic
[Kirdyanov, Alexander V.] VN Sukachev Inst Forest, Krasnoyarsk, Russia
[Kirdyanov, Alexander V.] Siberian Fed Univ, Krasnoyarsk, Russia
[Nikolaev, Anatoly N.] North Eastern Fed Univ, Yakutsk, Russia
[Nikolaev, Anatoly N.] Melnikov Permafrost Inst, Yakutsk, Russia
[Tegel, Willy] Univ Freiburg, Freiburg, Germany
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Доп.точки доступа:
Buntgen, U...; Kirdyanov, A.V.; Hellmann, L...; Nikolaev, A.N.; Tegel, W...; WSL; Eva Mayr-Stihl Foundation; Russian NorthEastern Federal University in Yakutsk; Russian Foundation for Basic Research [RFBR-12-04-00542]; SB RAS; Operational Programme of Education for Competitiveness of Ministry of Education, Youth and Sports of the Czech Republic [CZ.1.07/2.3.00/20.0248]

[Text] / J. Viers [et al.] // Geochem. Trans. - 2015. - Vol. 16. - Ст. 3, DOI 10.1186/s12932-015-0018-0. - Cited References:81. - This work was supported by the GDRI Car-Wet-Sib, the ANR CESA "Artic Metals" (France), RSF 14-24-0013, and the grant "BIO-GEO-CLIM" of the Russian Ministry of Education and Research and Tomsk State University (No 14.B25.31.0001). . - ISSN 1467-4866РУБ Geochemistry & Geophysics

Аннотация: Stable Zn isotopes fractionation was studied in main biogeochemical compartments of a pristine larch forest of Central Siberia developed over continuous permafrost basalt rocks. Two north-and south-oriented watershed slopes having distinctly different vegetation biomass and active layer depth were used as natural proxy for predicting possible future climate changes occurring in this region. In addition, peat bog zone exhibiting totally different vegetation, hydrology and soil temperature regime has been studied. The isotopic composition of soil profile from Central Siberia is rather constant with a delta Zn-66 value around 0.2 parts per thousand close to the value of various basalts. Zn isotopic composition in mosses (Sphagnum fuscum and Pleurozium schreberi) exhibits differences between surface layers presenting values from 0.14 to 0.2 parts per thousand and bottom layers presenting significantly higher values (0.5 - 0.7 parts per thousand) than the underlain mineral surface. The humification of both dead moss and larch needles leads to retain the fraction where Zn bound most strongly thus releasing the lighter isotopes in solution and preserving the heavy isotopes in the humification products, in general accord with previous experimental and modeling works [GCA 75:7632-7643, 2011]. The larch (Larix gmelinii) from North and South-facing slopes is enriched in heavy isotopes compared to soil reservoir while larch from Sphagnum peatbog is enriched in light isotopes. This difference may result from stronger complexation of Zn by organic ligands and humification products in the peat bog compared to mineral surfaces in North- and South-facing slope. During the course of the growing period, Zn followed the behavior of macronutrients with a decrease of concentration from June to September. During this period, an enrichment of larch needles by heavier Zn isotopes is observed in the various habitats. We suggest that the increase of the depth of rooting zone, and the decrease of DOC and Zn concentration in soil solution from the root uptake zone with progressively thawing soil could provoke heavy isotopes to become more available for the larch roots at the end of the vegetative season compared to the beginning of the season, because the decrease of DOC will facilitate the uptake of heavy isotope as it will be less retained in strong organic complexes.

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Держатели документа:
Univ Toulouse 3, CNRS, IRD, GET OMP,UMR CNRS 5563, F-31400 Toulouse, France.
VN Sukachev Inst Forestry SB RAS, Krasnoyarsk 660036, Russia.
Tomsk State Univ, BIO GEO CLIM Lab, Tomsk 634050, Russia.
UB RAS, Inst Ecol Problems North, Lab Freshwater & Marine Ecosyst, Arkhangelsk, Russia.
Univ Strasbourg, CNRS, LHYGES EOST, F-67084 Strasbourg, France.

Доп.точки доступа:
Viers, Jerome; Prokushkin, Anatoly S.; Pokrovsky, Oleg S.; Kirdyanov, Alexander V.; Zouiten, Cyril; Chmeleff, Jerome; Meheut, Merlin; Chabaux, Francois; Oliva, Priscia; Dupre, Bernard; GDRI Car-Wet-Sib; ANR CESA "Artic Metals" (France); RSF [14-24-0013]; grant "BIO-GEO-CLIM" of the Russian Ministry of Education and Research; Tomsk State University [14.B25.31.0001]

[Text] / M. V. Bryukhanova [et al.] // Dendrochronologia. - 2015. - Vol. 34. - P51-59, DOI 10.1016/j.dendro.2015.05.002. - Cited References:50. - This work was supported by the Swiss National Science Foundation (Valorization Grant IZ76Z0_141967/1), the Joint Research Project SCOPES (IZ73Z0_128035/1) and Ministry of Education and Science of the Russian Federation (Grants from the President of RF for Young Scientists MK-5498.2012.4 and MK-1589.2014.4). The research is linked to activities conducted within the COST FP1106 network. . - ISSN 1125-7865. - ISSN 1612-0051РУБ Plant Sciences + Forestry

Аннотация: Global warming is most pronounced in high-latitude regions by altering habitat conditions and affecting permafrost degradation, which may significantly influence tree productivity and vegetation changes. In this study, by applying a "space-for-time" approach, we selected three plots of Larix gmelinii forest from a continuous permafrost zone in Siberia with different thermo-hydrological soil regimes and ground cover vegetation with the objective of assessing how tree growth and productivity will change under different stages of permafrost degradation. A tree-ring multi-proxy characterization of mature trees was used to identify shift in ecophysiological responses related to the modified plant-soil system. Variability of tree-ring width (1975-2009), stable isotope ratios (oxygen and carbon, 2000-2009) and xylem structural characteristics (2000-2009) under climatic conditions of particular years indicated that an increased depth of the soil active layer will initially lead to increase of tree productivity. However, due to an expected water use increase through transpiration, the system might progressively shift from a temperature to a moisture-limited environment. (C) 2015 Elsevier GmbH. All rights reserved.

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Держатели документа:
RAS, VN Sukachev Inst Forest SB, Krasnoyarsk 660036, Russia.
WSL Swiss Fed Res Inst, CH-8903 Birmensdorf, Switzerland.
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
ETH, Inst Terr Ecosyst, CH-8092 Zurich, Switzerland.

Доп.точки доступа:
Bryukhanova, Marina V.; Fonti, Patrick; Kirdyanov, Alexander V.; Siegwolf, Rolf T. W.; Saurer, Matthias; Pochebyt, Natalia P.; Churakova, O.V.; Prokushkin, Anatoly S.; Swiss National Science Foundation (Valorization Grant) [IZ76Z0_141967/1]; Joint Research Project SCOPES [IZ73Z0_128035/1]; Ministry of Education and Science of Russian Federation (RF for Young Scientists) [MK-5498.2012.4, MK-1589.2014.4]

[Text] / L. Hellmann [et al.] // Arct. Antarct. Alp. Res. - 2015. - Vol. 47, Is. 3. - P449-460, DOI 10.1657/AAAR0014-063. - Cited References:66. - This study is part of the ongoing "DW project" supported by the Eva Mayr-Stihl Foundation and the Swiss Federal Research Institute WSL. Additional support was received from the Czech project "Building up a multidisciplinary scientific team focused on drought" (No. CZ.1.07/2.3.00/20.0248). V. Trotsiuk and L. Hulsmann provided technical support. J. Ejdesgaard and E. av Kak collected DW samples on the Faroe Islands, and D. Galvan and F. Charpentier contributed to discussion. Tree-ring data for Siberia were partly assembled under the Russian Science Foundation project 14-14-00295. We are thankful to all ITRDB contributors. We thank three anonymous reviewers and A. Jennings for helpful and constructive comments. . - ISSN 1523-0430. - ISSN 1938-4246РУБ Environmental Sciences + Geography, Physical

Аннотация: Recent findings indicated spruce from North America and larch from eastern Siberia to be the dominating tree species of Arctic driftwood throughout the Holocene. However, changes in source region forest and river characteristics, as well as ocean current dynamics and sea ice extent likely influence its spatiotemporal composition. Here, we present 2556 driftwood samples from Greenland, Iceland, Svalbard, and the Faroe Islands. A total of 498 out of 969 Pinus sylvestris ring width series were cross-dated at the catchment level against a network of Eurasian boreal reference chronologies. The central Siberian Yenisei and Angara Rivers account for 91% of all dated pines, with their outermost rings dating between 1804 and 1999. Intensified logging and timber rafting along the Yenisei and Angara in the mid-20th century, together with high discharge rates, explain the vast quantity of material from this region and its temporal peak ca. 1960. Based on the combined application of wood-anatomical and dendrochronological techniques on a well-replicated data set, our results question the assumption that Arctic driftwood mainly consists of millennial-old larch and spruce. Nevertheless, data from other species and regions, together with longer boreal reference chronologies, are needed for generating reliable proxy archives at the interface of marine and terrestrial environments.

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Держатели документа:
WSL, Swiss Fed Res Inst, CH-8903 Birmensdorf, Switzerland.
Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland.
Univ Freiburg, Inst Forest Sci IWW, D-79106 Freiburg, Germany.
VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia.
Iceland Forest Serv, IS-116 Reykjavik, Iceland.
Johannes Gutenberg Univ Mainz, D-55128 Mainz, Germany.
Inst Plant & Anim Ecol UD RAS, Ekaterinburg 620144, Russia.
North Eastern Fed Univ, Yakutsk 677000, Russia.
Melnikov Permafrost Inst, Yakutsk 677010, Russia.
Stolby Natl Wildlife Nat Reserve, Krasnoyarsk 660006, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Swiss Fed Inst Technol, Inst Terr Ecosyst, CH-8092 Zurich, Switzerland.
Global Change Res Ctr AS CR, Brno 60300, Czech Republic.

Доп.точки доступа:
Hellmann, Lena; Tegel, Willy; Kirdyanov, Alexander V.; Eggertsson, Olafur; Esper, Jan; Agafonov, Leonid; Nikolaev, Anatoly N.; Knorre, Anastasia A.; Myglan, Vladimir S.; Churakova, O.; Schweingruber, Fritz H.; Nievergelt, Daniel; Verstege, Anne; Buntgen, U.; Eva Mayr-Stihl Foundation; Swiss Federal Research Institute WSL; Czech project "Building up a multidisciplinary scientific team focused on drought" [CZ.1.07/2.3.00/20.0248]; Russian Science Foundation [14-14-00295]

/ V. Shishov [et al.] // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. - 2015. - Vol. 2: 15th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2015 (18 June 2015 through 24 June 2015, ) Conference code: 153969, Is. 3. - P537-544 . -
Аннотация: Tree-ring chronologies (dendrochronological time series) are an important proxy source for oblique high-resolution information about climate and environmental changes in the past and present. Often the time series signals are associated with direct external periodic forcing (e.g., annual irradiance, seasonal moisture regimes, etc.), or with the internal oscillations within biological systems themselves (e.g., age-dependent trends, components of competition, etc). In most cases, the observed signal is interpreted as superposition of different internal and external influences. In most cases due to unstable frequency, amplitude and phase of analyzed signals the significance of power spectrum peaks may be tested by the “red-noise” null hypothesis, with a number of additional assumptions concerning possible causes for the observed instability. The goal of this paper is to verify information losses in the case of testing a power spectrum by the “white-noise” null hypothesis in order to detect significant cycles in dendrochronological time series. The new approach described herein allows us to (1) obtain an adequate spectral decomposition of different tree-ring chronologies; (2) analyze spatial comparisons of different time series, specifying possible causes for disagreement; and (3) build new long-term reconstructions of different climatic series by different cyclical components. Moreover, the approach helps to extend super long-term tree-ring chronologies by low-frequency components, to verify temporal periods in the past for which there are no good statistical estimations, which will enable extension of existing climatic reconstructions. © SGEM2015.

Scopus

Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Sukachev Institute of Forest, SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shishov, V.; Ovchinnikov, D.; Koiupchenko, I.; Tychkov, I.; Ovchinnikov, S.

[Text] / V. Shishov [et al.] // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS, SGEM 2015, VOL II : STEF92 TECHNOLOGY LTD, 2015. - 15th International Multidisciplinary Scientific Geoconference (SGEM) (JUN 18-24, 2015, Albena, BULGARIA). - P537-544. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:15 . -
Аннотация: Tree-ring chronologies (dendrochronological time series) are an important proxy source for oblique high-resolution information about climate and environmental changes in the past and present. Often the time series signals are associated with direct external periodic forcing (e.g., annual irradiance, seasonal moisture regimes, etc.), or with the internal oscillations within biological systems themselves (e.g., age-dependent trends, components of competition, etc). In most cases, the observed signal is interpreted as superposition of different internal and external influences. In most cases due to unstable frequency, amplitude and phase of analyzed signals the significance of power spectrum peaks may be tested by the "red-noise" null hypothesis, with a number of additional assumptions concerning possible causes for the observed instability. The goal of this paper is to verify information losses in the case of testing a power spectrum by the "white-noise" null hypothesis in order to detect significant cycles in dendrochronological time series. The new approach described herein allows us to (1) obtain an adequate spectral decomposition of different tree-ring chronologies; (2) analyze spatial comparisons of different time series, specifying possible causes for disagreement; and (3) build new long-term reconstructions of different climatic series by different cyclical components. Moreover, the approach helps to extend super long-term tree-ring chronologies by low-frequency components, to verify temporal periods in the past for which there are no good statistical estimations, which will enable extension of existing climatic reconstructions.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
SB RAS, Sukachev Inst Forest, Krasnoyarsk, Russia.

Доп.точки доступа:
Shishov, Vladimir; Ovchinnikov, Dmitriy; Koiupchenko, Irina; Tychkov, Ivan; Ovchinnikov, Svjatoslav

[Text] / J. Esper [et al.] // Quat. Sci. Rev. - 2016. - Vol. 145. - P134-151, DOI 10.1016/j.quascirev.2016.05.009. - Cited References:123. - We thank all the tree-ring data producers for sharing their chronologies and measurement series. Supported by the German Science Foundation, Grant 161/9-1. Lamont-Doherty Earth Observatory contribution number 8019. JL acknowledges the German Science Foundation project "Attribution of forced and internal Chinese climate variability in the Common Era". VM acknowledges grant RNF 15-14-30011. BY acknowledges the National Natural Science Foundation of China (Grant 41325008). . - ISSN 0277-3791РУБ Geography, Physical + Geosciences, Multidisciplinary

Аннотация: Tree-ring chronologies are widely used to reconstruct high-to low-frequency variations in growing season temperatures over centuries to millennia. The relevance of these timeseries in large-scale climate reconstructions is often determined by the strength of their correlation against instrumental temperature data. However, this single criterion ignores several important quantitative and qualitative characteristics of tree-ring chronologies. Those characteristics are (i) data homogeneity, (ii) sample replication, (iii) growth coherence, (iv) chronology development, and (v) climate signal including the correlation with instrumental data. Based on these 5 characteristics, a reconstruction-scoring scheme is proposed and applied to 39 published, millennial-length temperature reconstructions from Asia, Europe, North America, and the Southern Hemisphere. Results reveal no reconstruction scores highest in every category and each has their own strengths and weaknesses. Reconstructions that perform better overall include N-Scan and Finland from Europe, E-Canada from North America, Yamal and Dzhelo from Asia. Reconstructions performing less well include W-Himalaya and Karakorum from Asia, Tatra and S-Finland from Europe, and Great Basin from North America. By providing a comprehensive set of criteria to evaluate tree-ring chronologies we hope to improve the development of large-scale temperature reconstructions spanning the past millennium. All reconstructions and their corresponding scores are provided at www.blogs.uni-mainz.de/fb09climatology. (C) 2016 Elsevier Ltd. All rights reserved.

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Johannes Gutenberg Univ Mainz, Dept Geog, D-55099 Mainz, Germany.
Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden.
Navarino Environm Observ, Messinia, Greece.
Stockholm Univ, Dept Hist, S-10691 Stockholm, Sweden.
Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden.
Univ Giessen, Dept Geog, D-35390 Giessen, Germany.
Univ Giessen, Ctr Int Dev & Environm Res, D-35390 Giessen, Germany.
Univ Padua, Dipartimento Territorio & Sistemi AgroForestali, I-35020 Legnaro, Italy.
Lamont Doherty Earth Observ, Tree Ring Lab, Palisades, NY 10964 USA.
William Paterson Univ, Dept Environm Sci, Wayne, NJ 07470 USA.
RAS, SB, Inst Forest, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Ecosyst Biogeochem, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Inst Humanities, Krasnoyarsk 660041, Russia.
Nat Resources Inst Finland Luke, Rovaniemi Unit, Rovaniemi, Finland.
Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland.
Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA.
CONICET Mendoza, Inst Argentino Nivol Glaciol & Ciencias Ambiental, RA-5500 Mendoza, Argentina.
Chinese Acad Sci, Key Lab Desert & Desertificat, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China.

Доп.точки доступа:
Esper, Jan; Krusic, Paul J.; Ljungqvist, Fredrik C.; Luterbacher, Juerg; Carrer, Marco; Cook, E.d.; Davi, Nicole K.; Hartl-Meier, Claudia; Kirdyanov, Alexander; Konter, Oliver; Myglan, Vladimir; Timonen, Mauri; Treydte, Kerstin; Trouet, Valerie; Villalba, Ricardo; Yang, Bao; Buntgen, Ulf; German Science Foundation [161/9-1]; National Natural Science Foundation of China [41325008]; [RNF 15-14-30011]

/ L. Hellmann [et al.] // Dendrochronologia. - 2016. - Vol. 39: Workshop on Current Status and the Potential of Tree-Ring Research in (JAN 20-21, 2015, Krasnoyarsk, RUSSIA). - P3-9, DOI 10.1016/j.dendro.2015.12.010. - Cited References:53 . - ISSN 1125-7865. - ISSN 1612-0051РУБ Plant Sciences + Forestry + Geography, Physical

Аннотация: Arctic driftwood represents a unique proxy archive at the interface of marine and terrestrial environments. Combined wood anatomical and dendrochronological analyses have been used to detect the origin of driftwood and may allow past timber floating activities, as well as past sea ice and ocean current dynamics to be reconstructed. However, the success of driftwood provenancing studies depends on the length, number, and quality of circumpolar boreal reference chronologies. Here, we introduce a Eurasian-wide high-latitude network of 286 ring width chronologies from the International Tree Ring Data Bank (ITRDB) and 160 additional sites comprising the three main boreal conifers Pinus, Larix, and Picea. We assess the correlation structure within the network to identify growth patterns in the catchment areas of large Eurasian rivers, the main driftwood deliverers. The occurrence of common growth patterns between and differing patterns within catchments indicates the importance of biogeographic zones for ring width formation and emphasizes the degree of spatial precision when provenancing. Reference chronologies covering millennial timescales are so far restricted to a few larch sites in Central and Eastern Siberia (eastern Taimyr, Yamal Peninsula and north-eastern Yakutia), as well as several pine sites in Scandinavia, where large rivers are missing though. The general good spatial coverage of tree-ring sites across northern Eurasia indicates the need for updating and extending existing chronologies rather than developing new sites. (C) 2016 Elsevier GmbH. All rights reserved.

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Держатели документа:
WSL, Swiss Fed Res Inst, Birmensdorf, Switzerland.
Oeschger Ctr Climate Change Res, Bern, Switzerland.
Inst Plant & Anim Ecol UD RAS, Ekaterinburg, Russia.
Swiss Fed Inst Technol, Inst Terr Ecosyst, Zurich, Switzerland.
Univ Bern, Dendrolab Ch, Bern, Switzerland.
Johannes Gutenberg Univ Mainz, Mainz, Germany.
Iceland Forest Serv, Reykjavik, Iceland.
VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia.
Stolby Natl Wildlife Nat Reserve, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
North Eastern Fed Univ, Yakutsk, Russia.
Melnikov Permafrost Inst, Yakutsk, Russia.
RAS, Inst Geog, Moscow, Russia.
Univ Freiburg, Inst Forest Sci IWW, Freiburg, Germany.
Global Change Res Ctr AS CR, Brno, Czech Republic.

Доп.точки доступа:
Hellmann, Lena; Agafonov, Leonid; Churakova, O.; Duthorn, Elisabeth; Eggertsson, Olafur; Esper, Jan; Kirdyanov, Alexander V.; Knorre, Anastasia A.; Moiseev, Pavel; Myglan, Vladimir S.; Nikolaev, Anatoly N.; Reinig, Frederick; Schweingruber, Fritz; Solomina, Olga; Tegel, Willy; Buntgen, Ulf; buentgen, ulf

/ A. V. Kirdyanov [et al.] // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS CONFERENCE : STEF92 TECHNOLOGY LTD, 2016. - 16th International Multidisciplinary Scientific Geoconference (SGEM (JUN 30-JUL 06, 2016, Albena, BULGARIA). - P517-524. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:14 . - РУБ Ecology + Oceanography + Soil Science + Water Resources

Аннотация: The boreal forest accounts for approximately 22% of the Northern Hemisphere landmass with nearly 40% of this huge biome growing on continuously frozen soils. Projected climate change leading to degradation of permafrost and increasing drought situation at high latitudes in Eurasia will seriously affect productivity of forests on permafrost. Here we present the results of an on-going research of tree radial growth in the midst of the permafrost zone in Siberia, Russia (Tura region, 64 degrees N, 100 degrees E, 140-610 m a.s.1.). Tree-ring width and density chronologies of Gmelin larch and Siberian spruce from a great variety of sites characterized by different thermo-hydrological regime of soils are analyzed. The obtained results reveal that current tree radial growth and tree-ring structure in permafrost region in Siberia are largely dependent on local site conditions and may be constrained by low air and soil temperatures as well as soil water availability. Varying climatic responses and seasonal radial growth of trees at different habitats indicate a range of possible scenarios of further development of northern larch stands. Forest fire is another important factor strongly affecting tree stand dynamics and forest ecosystem functioning in the continuous permafrost zone. Analysis of tree-ring parameters indicate that post-fire dynamics of tree-ring structure is in accordance with the changes in habitat conditions caused by removal by fire and then gradual recovery of ground vegetation resulting in an alteration in soil active layer depth. In general, the results of this multi-proxy analysis for trees growing under various conditions in the continuous permafrost zone in Siberia allow assumptions about changes in tree productivity, stand dynamics and therefore carbon uptake under projected climate change and permafrost degradation.

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Держатели документа:
RAS, VN Sukachev Inst Forest, SB, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Natl Nat Reserve Stolby, Krasnoyarsk, Russia.

Доп.точки доступа:
Kirdyanov, Alexander V.; Bryukhanova, Marina V.; Knorre, Anastasia A.; Tabakova, Maria A.; Prokushkin, Anatoly S.

/ S. Guillet [et al.] // Nat. Geosci. - 2017. - Vol. 10, Is. 2. - P123-+, DOI 10.1038/NGEO2875. - Cited References:45. - S.G., C.C., M.S. and O.V.C. acknowledge support from the Era.Net RUSplus project ELVECS (SNF project number: IZRPZ0_164735). This study benefited from data gathered within the ANR CEPS GREENLAND project. V.S.M. received support from the Russian Science Foundation (project no. 15-14-30011). R. Hantemirov kindly provided a millennium-long chronology. The authors are grateful to W. S. Atwell and W. Wayne-Farris for discussions on historical sources from Japan as well as to M. Luisa Avila for her help with Muslim sources from Mediaeval Spain. S.G. and C.C. are very grateful to S. Finet, L. Fazan and P. Guerin for their help with R-scripts, translations and fruitful discussions, respectively. . - ISSN 1752-0894. - ISSN 1752-0908РУБ Geosciences, Multidisciplinary

Аннотация: The eruption of Samalas in Indonesia in 1257 ranks among the largest sulfur-rich eruptions of the Common Era with sulfur deposition in ice cores reaching twice the volume of the Tambora eruption in 1815. Sedimentological analyses of deposits confirm the exceptional size of the event, which had both an eruption magnitude and a volcanic explosivity index of 7. During the Samalas eruption, more than 40 km(3) of dense magma was expelled and the eruption column is estimated to have reached altitudes of 43 km. However, the climatic response to the Samalas event is debated since climate model simulations generally predict a stronger and more prolonged surface air cooling of Northern Hemisphere summers than inferred from tree-ring-based temperature reconstructions. Here, we draw on historical archives, ice-core data and tree-ring records to reconstruct the spatial and temporal climate response to the Samalas eruption. We find that 1258 and 1259 experienced some of the coldest Northern Hemisphere summers of the past millennium. However, cooling across the Northern Hemisphere was spatially heterogeneous. Western Europe, Siberia and Japan experienced strong cooling, coinciding with warmer-than-average conditions over Alaska and northern Canada. We suggest that in North America, volcanic radiative forcing was modulated by a positive phase of the El Nino-Southern Oscillation. Contemporary records attest to severe famines in England and Japan, but these began prior to the eruption. We conclude that the Samalas eruption aggravated existing crises, but did not trigger the famines.

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Держатели документа:
Univ Bern, Inst Geol Sci, Dendrolab Ch, Baltzerstr 1 3, CH-3012 Bern, Switzerland.
Univ Blaise Pascal, CNRS, UMR 6042, Geolab, 4 Rue Ledru, F-63057 Clermont Ferrand, France.
Univ Geneva, Inst Environm Sci, Climat Change & Climate Impacts, 66 Blvd Carl Vogt, CH-1205 Geneva, Switzerland.
Univ Geneva, Dept Earth Sci, Rue Maraichers 13, CH-1205 Geneva, Switzerland.
Univ Paris 06, Lab Oceanog & Climat Expt Approches Numer, 4 Pl Jussieu, F-75252 Paris 05, France.
Univ Paris 1 Pantheon Sorbonne, Lab Geog Phys, 1 Pl Aristide Briand, F-92195 Meudon, France.
Univ Reading, Dept Meteorol, NCAS Climate, Reading RG6 6BB, Berks, England.
UR ETNA Univ Grenoble Alpes, Irstea, 2 Rue Papeterie, F-38402 St Martin Dheres, France.
Univ Paris Saclay, Lab Sci Climat & Environm, Inst Pierre Simon Laplace, CEA,CNRS,UVSQ,UMR8212, F-91191 Gif Sur Yvette, France.
VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, RU-660041 Krasnoyarsk, Russia.
William Paterson Univ, Dept Environm Sci, Wayne, NJ 07470 USA.
Univ Arizona, Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA.
CNRS, UMR 7299, CCJ, Maison Mediterraneenne Sci Homme 5 Rue Chateau, F-13094 Aix En Provence, France.
Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China.
Chinese Acad Sci, Ctr Excellence & Innovat Tibetan Plateau Earth Sy, Beijing 100101, Peoples R China.
Univ Western Ontario, Dept Geog, 1151 Richmond St, London, ON N6A 5C2, Canada.
Aix Marseille Univ, CNRS, IRD, Coll France,CEREGE,ECCOREV, F-13545 Aix En Provence, France.
Univ Cambridge, Dept Geog, Downing Pl, Cambridge CB2 3EN, England.

Доп.точки доступа:
Guillet, Sebastien; Corona, Christophe; Stoffel, Markus; Khodri, Myriam; Lavigne, Franck; Ortega, Pablo; Eckert, Nicolas; Sielenou, Pascal Dkengne; Daux, Valerie; Churakova, O. V.; Davi, Nicole; Edouard, Jean-Louis; Zhang, Yong; Luckman, Brian H.; Myglan, Vladimir S.; Guiot, Joel; Beniston, Martin; Masson-Delmotte, Valerie; Oppenheimer, Clive; Era.Net RUSplus project ELVECS (SNF) [IZRPZ0_164735]; Russian Science Foundation [15-14-30011]

/ L. Hellmann [et al.] // Quat. Sci. Rev. - 2017. - Vol. 162. - P1-11, DOI 10.1016/j.quascirev.2017.02.025 . - ISSN 0277-3791
Аннотация: Arctic driftwood may represent a cross-disciplinary proxy archive at the interface of marine and terrestrial environments, which will likely gain in importance under future global climate change. Circumpolar network analyses that systematically consider species-specific boreal origin areas, transport routes and deposition characteristics of Arctic driftwood, are, however, missing. Here, we present tree-ring width (TRW) measurements of 2412 pine, larch and spruce driftwood samples from Greenland, Iceland, Svalbard, the Faroe Islands, and the Lena Delta in northeastern Siberia. Representing the largest Arctic driftwood TRW compilation, these data are compared against 495 TRW reference chronologies from the boreal forests of Eurasia and North America. The southern Yenisei region is the main source for recent pine driftwood at all Arctic sampling sites, whereas spruce mainly originates in western Russia and central Siberia, as well as in northern North America. Larch driftwood is, for the first time, dendro-provenanced to central and eastern Siberia. A new larch driftwood chronology extends the middle Lena River reference chronology back to 1203 CE. Annually resolved radiocarbon measurements further date six larch driftwood chronologies between 1294 and 2013 CE. Although being highly replicated, our study emphasizes the importance of interdisciplinary research efforts including radiocarbon dating, isotopic tracing and aDNA processing for improving Arctic driftwood provenancing in space and time. If successful, Arctic driftwood studies will contribute to the reconstruction of past boreal summer temperature variations and ocean current dynamics, as well as changes in sea ice extent and relative sea level over the last centuries to millennia. © 2017 Elsevier Ltd

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Держатели документа:
Instituto Argentino de Nivologia, Glaciologia y Ciencias Ambientales, CCT CONICET, Mendoza, Argentina
Swiss Federal Research Institute, WSL, Birmensdorf, Switzerland
Institute for Forest Sciences, University of Freiburg, Freiburg, Germany
V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
North-Eastern Federal University, Yakutsk, Russian Federation
Melnikov Permafrost Institute, Yakutsk, Russian Federation
Iceland Forest Service Mogilsa, Reykjavik, Iceland
Institute of Botany, Czech Academy of Sciences, Pruhonice, Czech Republic
ETH, Department of Physics, Ion Beam Physics, Zurich, Switzerland
Department of Geography, University of Cambridge, Cambridge, United Kingdom
CzechGlobe, Global Change Research Institute CAS and Masaryk University, Brno, Czech Republic

Доп.точки доступа:
Hellmann, L.; Tegel, W.; Geyer, J.; Kirdyanov, A. V.; Nikolaev, A. N.; Eggertsson, O.; Altman, J.; Reinig, F.; Morganti, S.; Wacker, L.; Buntgen, U.