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

[Text] / E. A. Vaganov [et al.] // Dokl. Earth Sci. - 2000. - Vol. 375, Is. 8. - P1314-1317. - Cited References: 12 . - 4. - ISSN 1028-334XРУБ Geosciences, Multidisciplinary


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Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
Swiss Fed Inst Forest Snow & Landscape Res, CH-8093 Birmensdorf, Switzerland
Russian Acad Sci, Inst Plant & Anim Ecol, Ural Div, Sverdlovsk 620219, Russia

Доп.точки доступа:
Vaganov, E.A.; Briffa, K.R.; Naurzbaev, M.M.; Schweingruber, F.H.; Shiyatov, S.G.; Shishov, V.V.

[Text] / A. G. Bunn [et al.] // Environ. Res. Lett. - 2013. - Vol. 8, Is. 3. - Ст. 35034, DOI 10.1088/1748-9326/8/3/035034. - Cited References: 36. - We thank the Northern Eurasian Earth Science Partnership Initiative for support via a grant from NASA-LCLUC-NEESPI (NNX09AK58G) to MKH and AGB and from NSF 0612341 and NSF 1044417 to AGB. VVS was supported by the Fulbright Scholar Program. Figure 1 was produced by Randal Bernhardt of the WWU Geography Department. . - 8. - ISSN 1748-9326РУБ Environmental Sciences + Meteorology & Atmospheric Sciences

Аннотация: Different methods have been developed for measuring carbon stocks and fluxes in the northern high latitudes, ranging from intensively measured small plots to space-based methods that use reflectance data to drive production efficiency models. The field of dendroecology has used samples of tree growth from radial increments to quantify long-term variability in ecosystem productivity, but these have very limited spatial domains. Since the cambium material in tree cores is itself a product of photosynthesis in the canopy, it would be ideal to link these two approaches. We examine the associations between the normalized differenced vegetation index (NDVI) and tree growth using 19 pairs of tree-ring widths (TRW) and maximum latewood density (MXD) across much of Siberia. We find consistent correlations between NDVI and both measures of tree growth and no systematic difference between MXD and TRW. At the regional level we note strong correspondence between the first principal component of tree growth and NDVI for MXD and TRW in a temperature-limited bioregion, indicating that canopy reflectance and cambial production are broadly linked. Using a network of 21 TRW chronologies from south of Lake Baikal, we find a similarly strong regional correspondence with NDVI in a markedly drier region. We show that tree growth is dominated by variation at decadal and multidecadal time periods, which the satellite record is incapable of recording given its relatively short record.

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Держатели документа:
[Bunn, Andrew G.] Western Washington Univ, Dept Environm Sci, Huxley Coll, Bellingham, WA 98225 USA
[Hughes, Malcolm K.
Losleben, Mark] Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA
[Kirdyanov, Alexander V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
[Shishov, Vladimir V.
Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk, Russia
[Berner, Logan T.] Woods Hole Res Ctr, Falmouth, MA USA
[Oltchev, Alexander] RAS, Severtsov Inst Ecol & Evolut, Moscow 117901, Russia

Доп.точки доступа:
Bunn, A.G.; Hughes, M.K.; Kirdyanov, Alexander V.; Кирдянов, Александр Викторович; Losleben, M.; Shishov, V.V.; Berner, L.T.; Oltchev, A.; Vaganov, E.A.; Northern Eurasian Earth Science Partnership Initiative via NASA-LCLUC-NEESPI [NNX09AK58G]; NSF [0612341, 1044417]; Fulbright Scholar Program

[Text] / M. M. Naurzbaev, E. A. Vaganov // J. Geophys. Res.-Atmos. - 2000. - Vol. 105, Is. D6. - P7317-7326, DOI 10.1029/1999JD901059. - Cited References: 40 . - 10. - ISSN 2169-897XРУБ Meteorology & Atmospheric Sciences

Аннотация: Regional tree ring chronology with extension 2209 years (from 212 B.C. till 1996 A.D.) was built for east Taymir and Putoran according to wood of living trees, well- preserved remains of dead trees, and subfossil wood from alluvial bank deposits by the cross-dating method. In addition, the "floating" tree ring width chronology for the period of Holocene optimum (3300-2600 B.C.) was built with extention 685 years and supported by several radiocarbon dates. High values of synchrony and correlation of individual tree ring series show a prevailing effect of one external factor on radial tree growth change in the studied region of the Siberian subarctic. It was established that the main factors of growth variability are the early summer and annual temperature, which explain up to 70% of tree growth rate variability. Cyclic components stable for two millennia were revealed at analysis of the tree ring chronology: double secular (similar to 180 years), secular (78-90 years), and intrasecular (44, 28, 11, and 6.7-6.9 years) variations. Models for reconstruction of the early summer and annual air temperature were obtained according to tree ring variability. Temperature dynamics in the eastern part of Taymir for the last two millenia agree well with temperature variations in the Northern Hemisphere obtained according to other indirect sources. The warming of the middle of the twentieth century is not extraordinary. The warming at the end of the first and beginning of the second millennia ("Medieval Warm Period") was longer in time and closer in amplitude.

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Держатели документа:
Taymir Biospher Reserve, Khatanga, Russia
Russian Acad Sci, Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

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

[Text] / E. A. Vaganov [et al.] // Nature. - 1999. - Vol. 400, Is. 6740. - P149-151. - Cited References: 23 . - 3. - ISSN 0028-0836РУБ Multidisciplinary Sciences

Аннотация: The causes of a reduced sensitivity of high-latitude tree growth to variations in summer temperature for recent decades(1,2), compared to earlier this century, are unknown. This sensitivity change is problematic, in that relationships between tree-ring properties and temperature are widely used for reconstructing past climate. Here we report an analysis of tree-ring and climate data from the forest-tundra zone, in combination with a mechanistic model of tree-ring growth, to argue that an increasing trend of winter precipitation over the past century in many subarctic regions(3-5) led to delayed snow melt in these permafrost environments. As a result, the initiation of cambial activity (necessary for the formation of wood cells) has been delayed relative to the pre-1960 period in the Siberian subarctic. Since the early 1960s, less of the growth season has been during what had previously been the period of maximal growth sensitivity to temperature. This shift results not only in slower growth, but also in a reduced correlation between growth and temperature. Our results suggest that changes in winter precipitation should be considered in seeking explanations for observed changes in the timing of the 'spring greening' of high-latitude forests(6), and should be taken into account in the study of the role of the Siberian subarctic forest in the global carbon cycle.

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Держатели документа:
Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA
Russian Acad Sci, Academgorodok, Inst Forest SB, Krasnoyarsk 660036, Russia
Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland

Доп.точки доступа:
Vaganov, E.A.; Hughes, M.K.; Kirdyanov, A.V.; Schweingruber, F.H.; Silkin, P.P.