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

[Text] / N. M. Tchebakova, E. I. Parfenova, A. J. Soja // Reg. Envir. Chang. - 2011. - Vol. 11, Is. 4. - P817-827, DOI 10.1007/s10113-011-0210-4. - Cited References: 65. - This study was supported by grant #10-05-00941 of the Russian Foundation for Basic Research and NASA Research Opportunities in Space and Earth Sciences (ROSES) 2009 InterDisciplinary Science (IDS) 09-IDS09-0116. . - 11. - ISSN 1436-3798РУБ Environmental Sciences + Environmental Studies

Аннотация: Regional Siberian studies have already registered climate warming over the last several decades. We evaluated ongoing climate change in central Siberia between 1991 and 2010 and a baseline period, 1961-1990, and between 1991 and 2010 and Hadley 2020 climate change projections, represented by the moderate B1 and severe A2 scenarios. Our analysis showed that winters are already 2-3A degrees C warmer in the north and 1-2A degrees C warmer in the south by 2010. Summer temperatures increased by 1A degrees C in the north and by 1-2A degrees C in the south. Change in precipitation is more complicated, increasing on average 10% in middle latitudes and decreasing 10-20% in the south, promoting local drying in already dry landscapes. Hot spots of possible forest shifts are modeled using our Siberian bioclimatic vegetation model and mountain vegetation model with respect to climate anomalies observed pre-2010 and predicted 2020 Hadley scenarios. Forests are predicted to shift northwards along the central Siberian Plateau and upslope in both the northern and southern mountains. South of the central Siberian Plateau, steppe advancement is predicted that was previously non-existent north of 56A degrees N latitude. South of 56A degrees N, steppe expansion is predicted in the dry environments of Khakasiya and Tyva. In the southern mountains, it is predicted that the lower tree line will migrate upslope due to increased dryness in the intermontane Tyvan basins. The hot spots of vegetation change that are predicted by our models are confirmed by regional literature data.

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Держатели документа:
[Tchebakova, N. M.
Parfenova, E. I.] Russian Acad Sci Academgorodok, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
[Soja, A. J.] NASA Langley Res Ctr, Natl Inst Aerosp, Hampton, VA 23681 USA

Доп.точки доступа:
Tchebakova, N.M.; Parfenova, E.I.; Soja, A.J.

[Text] / V. I. Kharuk [et al.] // Russ. J. Ecol. - 2008. - Vol. 39, Is. 1. - P8-13, DOI 10.1134/S1067413608010025. - Cited References: 25 . - 6. - ISSN 1067-4136РУБ Ecology

Аннотация: Parameters of reproduction of the Siberian stone pine (Pinus sibirica), including radial and apical tree increments, the age structure of stands, the amount of young growth, and its distribution along an altitudinal gradient, have been studied in the forest-tundra ecotone of the Western Sayan. The results show that, over the past 30 years, P. sibirica undergrowth has expanded to the mountain tundra belt, the apical and radial tree increments and stand density have increased, and the life form of many P. sibirica plants has changed from prostrate to erect (single-or multistemmed). These changes correlate with the dynamics of summer temperatures and monthly (in May and June) and annual precipitation. The rise of summer temperatures by 1 degrees C promotes the expansion of P. sibirica undergrowth for approximately 150 m up the altitudinal gradient.

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[Kharuk, V. I.
Dvinskaya, M. L.
Im, S. T.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 630036, Russia
[Ranson, K. J.] NASA, Goddard Space Ctr, Washington, DC 20546 USA

Доп.точки доступа:
Kharuk, V.I.; Dvinskaya, M.L.; Im, S.T.; Ranson, K.J.

[Text] / A. . Rodionov [et al.] // Eur. J. Soil Sci. - 2007. - Vol. 58, Is. 6. - P1260-1272, DOI 10.1111/j.1365-2389.2007.00919.x. - Cited References: 44 . - 13. - ISSN 1351-0754РУБ Soil Science

Аннотация: Soils of the high latitudes are expected to respond sensitively to climate change, but still little is known about carbon and nitrogen variability in them. We investigated the 0.44-km(2) Little Grawijka Creek catchment of the forest tundra ecotone (northern Krasnoyarsk Krai, Russian Federation) in order (i) to relate the active-layer thickness to controlling environmental factors, (ii) to quantify soil organic carbon (SOC) and total nitrogen (NT) stocks, and (iii) to assess their variability with respect to different landscape units. The catchment was mapped on a 50 x 50 m grid for topography, dominant tree and ground vegetation, organic-layer and moss-layer thickness, and active-layer thickness. At each grid point, bulk density, and SOC and NT concentrations were determined for depth increments. At three selected plots, 2-m deep soil cores were taken and analysed for SOC, NT and C-14. A shallow active layer was found in intact raised bogs at plateaux situations and in mineral soils of north-northeast (NNE) aspect. Good drainage and greater solar insolation on the south-southwest (SSW) slopes are reflected in deeper active layers or lack of permafrost. Organic carbon stocks to a soil depth of 90 cm varied between 5 and 95 kg m(-2). The greatest stocks were found in the intact raised bogs and on the NNE slopes. Canonical correspondence analysis indicates the dominant role of active-layer thickness for SOC and NT storage. The 2-m soil cores suggest that permafrost soils store about the same amount of SOC from 90 to 200 cm as in the upper 90 cm. Most of this deep SOC pool was formed in the mid-Holocene (organic soils) and the late Pleistocene (mineral soils). Our results showed that even within a small catchment of the forest tundra, active-layer thickness and, hence, SOC and NT storage vary greatly within the landscape mosaic. This has to be taken into account when using upscaling methods such as remote sensing for assessing SOC and NT storage and cycling at a regional to continental level.

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Держатели документа:
Univ Halle Wittenberg, Inst Agr & Ernahrungswissensch, D-06108 Halle, Germany
Univ Gottingen, Inst Bodenkunde & Waldernahrung, D-37077 Gottingen, Germany
Max Planck Inst Biogeochem, D-07745 Jena, Germany
SB RAS, Field Stn Igarka Permafrost Inst Yakutsk, Igarka 663200, Russia
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Rodionov, A...; Flessa, H...; Grabe, M...; Kazansky, O.A.; Shibistova, O...; Guggenberger, G...

[Text] / V. I. Kharuk [et al.] // Russ. J. Ecol. - 2006. - Vol. 37, Is. 5. - P291-298, DOI 10.1134/S1067413606050018. - Cited References: 17 . - 8. - ISSN 1067-4136РУБ Ecology

Аннотация: Climate-related changes that occurred in the Ary-Mas larch forests (the world's northernmost forest range) in the last three decades of the 20th century have been analyzed. An analysis of remote-sensing images made by Landsat satellites in 1973 and 2000 has provided evidence for an increase in the closeness of larch forest canopy (by 65%) and the expansion of larch to the tundra (for 3-10 in per year) and to areas relatively poorly protected from wind due to topographic features (elevation, azimuth, and slope). It has also been shown that the radial tree increment correlates with summer temperatures (r = 0.65, tau = 0.39) and the amounts of precipitation in summer (r = -0.51, tau = 0-41) and winter (r = -0.70, tau = -0.48), decreases with an increase in the closeness of forest canopy (r = -0.52, p > 0.8; tau = -0.48, p > 0.95), and increases with an increase in the depth of soil thawing (r = 0.63, p > 0.9; tau = 0.46, p > 0.9). The density of undergrowth depends on temperatures in winter(tau = 0.53, p > 0.8) and summer (r = 0.98, p > 0.99, tau = 0.9, p > 0.99) and the date of the onset of the growing period (r = -0.60, p > 0.99; T = -0.4, p > 0.99) and negatively correlates with the amount of precipitation in summer (r = -0.56, p > 0.99, T = -0.38, p > 0.99).

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Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
NASA, Goddard Space Flight Ctr, Washington, DC 20546 USA

Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Naurzbaev, M.M.

[Text] / A. D. McGuire [et al.] // J. Veg. Sci. - 2002. - Vol. 13: IGBP Terrestrial Transects Workshop (JUL 12-16, 1999, DARWIN, AUSTRALIA), Is. 3. - P301-314, DOI 10.1111/j.1654-1103.2002.tb02055.x. - Cited References: 69 . - 14. - ISSN 1100-9233РУБ Plant Sciences + Ecology + Forestry

Аннотация: The responses of high latitude ecosystems to global change involve complex interactions among environmental variables, vegetation distribution, carbon dynamics, and water and energy exchange. These responses may have important consequences for the earth system. In this study, we evaluated how vegetation distribution, carbon stocks and turnover, and water and energy exchange are related to environmental variation spanned by the network of the IGBP high latitude transects. While the most notable feature of the high latitude transects is that they generally span temperature gradients from southern to northern latitudes, there are substantial differences in temperature among the transects. Also, along each transect temperature co-varies with precipitation and photosynthetically active radiation, which are also variable among the transects. Both climate and disturbance interact to influence latitudinal patterns of vegetation and soil carbon storage among the transects, and vegetation distribution appears to interact with climate to determine exchanges of heat and moisture in high latitudes. Despite limitations imposed by the data we assembled, the analyses in this study have taken an important step toward clarifying the complexity of interactions among environmental variables, vegetation distribution, carbon stocks and turnover, and water and energy exchange in high latitude regions. This study reveals the need to conduct coordinated global change studies in high latitudes to further elucidate how interactions among climate, disturbance, and vegetation distribution influence carbon dynamics and water and energy exchange in high latitudes.

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Univ Alaska Fairbanks, Alaska Cooperat Fish & Wildlife Res Unit, US Geol Survey, Fairbanks, AK 99775 USA
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Canadian Forest Serv, No Forestry Ctr, Edmonton, AB T6H 3S5, Canada
Monash Univ, Sch Geog & Environm Sci, Clayton, Vic 3800, Australia
Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA
Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA
Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
Far Eastern Forestry Res Inst, Khaborovsk 680030, Russia
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
Hokkaido Univ, Inst Low Temp, Sapporo, Hokkaido 060, Japan
Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706 USA
Univ Alaska Fairbanks, Inst No Engn, Fairbanks, AK 99775 USA
Univ Durham, Environm Res Ctr, Durham DH1 3LE, England
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia

Доп.точки доступа:
McGuire, A.D.; Wirth, C...; Apps, M...; Beringer, J...; Clein, J...; Epstein, H...; Kicklighter, D.W.; Bhatti, J...; Chapin, F.S.; de Groot, B...; Efremov, D...; Eugster, W...; Fukuda, M...; Gower, T...; Hinzman, L...; Huntley, B...; Jia, G.J.; Kasischke, E...; Melillo, J...; Romanovsky, V...; Shvidenko, A...; Vaganov, E...; Walker, 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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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.