Climate-induced larch growth response within the central Siberian permafrost zone

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1088/1748-9326/10/12/125009

Ключевые слова: larch growth, permafrost thaw, tree ring growth, climate change, water stress, climate change, larch growth, permafrost thaw, tree ring growth, water stress, Drought, Forestry, Geodetic satellites, Permafrost, Soil moisture, Soils, Thawing, Equivalent water thickness, Gross primary production, Permafrost thaws, Snow accumulation, Soil water content, Summer temperature, Tree rings, Water stress, Climate change, climate change, coniferous tree, dendrochronology, growth response, limiting factor, permafrost, primary production, remote sensing, thawing, tree ring, water stress, Siberia, Larix, Larix gmelinii

Аннотация: Aim: estimation of larch (Larix gmelinii) growth response to current climate changes. Location: permafrost area within the northern part of Central Siberia (similar to 65.8 degrees N, 98.5 degrees E). Method: analysis of dendrochronological data, climate variables, drought index SPEI, GPP (gross primary production) and EVI vegetation index (both Aqua/MODIS satellite derived), and soil water content anomalies (GRACE satellite measurements of equivalent water thickness anomalies, EWTA). Results: larch tree ring width (TRW) correlated with previous year August precipitation (r = 0.63), snow accumulation (r = 0.61), soil water anomalies (r = 0.79), early summer temperatures and water vapor pressure (r = 0.73 and r = 0.69, respectively), May and June drought index (r = 0.68-0.82). There are significant positive trends of TRW since late 1980 s and GPP since the year 2000. Mean TRW increased by about 50%, which is similar to post-Little Ice Age warming. TRW correlated with GPP and EVI of larch stands (r = 0.68-0.69). Main conclusions: within the permafrost zone of central Siberia larch TRW growth is limited by early summer temperatures, available water from snowmelt, water accumulated within soil in the previous year, and permafrost thaw water. Water stress is one of the limiting factors of larch growth. Larch TRW growth and GPP increased during recent decades.

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Издание

Журнал: ENVIRONMENTAL RESEARCH LETTERS

Выпуск журнала: Vol. 10, Is. 12

ISSN журнала: 17489326

Место издания: BRISTOL

Издатель: IOP PUBLISHING LTD

Авторы

  • Kharuk V.I. (Siberian Federal University)
  • Im S.T. (Siberian State Aerospace University)
  • Petrov I.A. (Sukachev Institute of Forest)
  • Ranson K.J. (NASA's GSFC)

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