Snowmelt and the hydrological interaction of forest–grassland ecosystems in Central Yakutia, eastern Siberia

In the last two decades the major focus of study in forest water and carbon balances in eastern Siberia has been on the effect of rain during the growing season. Little attention has been paid to the contribution of snowmelt water. The results of the present study indicate that weather conditions during the snowmelt period as well as the soil moisture conditions carried from the previous year's growing season strongly determined the water availability for the forest ecosystem at the beginning of the next growing season. In the forest–grassland intermingled ecosystem of lowland Central Yakutia, gradual snowmelt water flow from the forest into the adjacent grassland depressions increased when soil moisture was high and air temperature was low, whereas low soil moisture and high air temperatures accelerated soil thawing and consequently snowmelt water infiltration into the forest soil. We found that snow depth did not determine the volume of snowmelt water moving to the grassland depression since the thermokarst lake water level in the adjacent grassland was about 25 cm lower in 2005 than in May 2006, even though maximum snow depth reached 57 cm and 43 cm in the winter of 2004–05 and 2005–06, respectively. The contribution of snowmelt water to forest growth as well as the flow of water from the forest to the grasslands showed a strong annual variability. We conclude that warmer springs and high variability in precipitation regimes as a result of climate change will result in more snowmelt water infiltration into the forest soil when the previous year's precipitation is low while more snowmelt water will flow into the thermokarst lake when the previous year's precipitation is high. Copyright © 2015 John Wiley & Sons, Ltd.

[1]  T. Maximov,et al.  Effect of increased rainfall on water dynamics of larch (Larix cajanderi) forest in permafrost regions, Russia: an irrigation experiment , 2010, Journal of Forest Research.

[2]  M. Torre Jorgenson,et al.  Abrupt increase in permafrost degradation in Arctic Alaska , 2006 .

[3]  Jaromír Demek,et al.  Thermokarst in Siberia and Its Influence on the Development of Lowland Relief , 1970, Quaternary Research.

[4]  U. Awan,et al.  Analysis of long term meteorological trends in the middle and lower Indus Basin of Pakistan—A non-parametric statistical approach , 2014 .

[5]  John P. Smol,et al.  Crossing the final ecological threshold in high Arctic ponds , 2007, Proceedings of the National Academy of Sciences.

[6]  K. Hinkel,et al.  Identification of heat‐transfer processes during soil cooling, freezing, and thaw in central alaska , 1994 .

[7]  D. Kane,et al.  Water movement into seasonally frozen soils , 1983 .

[8]  Takashi Hirano,et al.  Change of Carbon Dioxide Budget during Three Years after Deforestation in Eastern Siberian Larch Forest , 2005 .

[9]  R. Barry,et al.  Intraseasonal variation in the thermoinsulation effect of snow cover on soil temperatures and energy balance , 2002 .

[10]  Tomas Lundmark,et al.  The influence of soil temperature on transpiration: a plot scale manipulation in a young Scots pine stand , 2004 .

[11]  L. D. Hinzman,et al.  Disappearing Arctic Lakes , 2005, Science.

[12]  T. Ohta,et al.  Seasonal variation in the energy and water exchanges above and below a larch forest in eastern Siberia , 2001 .

[13]  Kenji Yoshikawa,et al.  Shrinking thermokarst ponds and groundwater dynamics in discontinuous permafrost near council, Alaska , 2003 .

[14]  Dylan B. A. Jones,et al.  The vertical distribution of ozone instantaneous radiative forcing from satellite and chemistry climate models , 2011 .

[15]  R. Desyatkin,et al.  Thermokarst Formation and Vegetation Dynamics Inferred from A Palynological Study in Central Yakutia, Eastern Siberia, Russia , 2006 .

[16]  Wei Zhang,et al.  Spatial and temporal trends of temperature and precipitation during 1960–2008 at the Hengduan Mountains, China , 2011 .

[17]  T. Maximov,et al.  Interannual environmental-soil thawing rate variation and its control on transpiration from Larix cajanderi, Central Yakutia, Eastern Siberia , 2007 .

[18]  Takashi Machimura,et al.  Comparison of carbon and water vapor exchange of forest and grassland in permafrost regions, Central Yakutia, Russia , 2008 .

[19]  U. Herzschuh,et al.  Present-day variability and Holocene dynamics of permafrost-affected lakes in central Yakutia (Eastern Siberia) inferred from diatom records , 2012 .

[20]  R. Barry,et al.  Interdecadal changes in seasonal freeze and thaw depths in Russia , 2004 .

[21]  P. Groffman,et al.  Snow depth manipulation and its influence on soil frost and water dynamics in a northern hardwood forest , 2001 .

[22]  T. Ohta,et al.  Forest Fires Effects on Carbon Stocks and Soil Chemistry in Central Yakutia, Eastern Siberia , 2012 .

[23]  A. Sugimoto,et al.  Effects of spatial and temporal variability in soil moisture on widths and δ13C values of eastern Siberian tree rings , 2003 .

[24]  A. Brouchkov,et al.  Epigenetic salt accumulation and water movement in the active layer of central Yakutia in eastern Siberia , 2005 .

[25]  R. Hatano,et al.  CH4 and N2O emissions from a forest‐alas ecosystem in the permafrost taiga forest region, eastern Siberia, Russia , 2008 .

[26]  Hironori Yabuki,et al.  Abrupt increases in soil temperatures following increased precipitation in a permafrost region, central Lena River basin, Russia , 2010 .

[27]  M. K. Hughes,et al.  Influence of snowfall and melt timing on tree growth in subarctic Eurasia , 1999, Nature.

[28]  Takashi Machimura,et al.  Influence of forest clear‐cutting on the thermal and hydrological regime of the active layer near Yakutsk, eastern Siberia , 2005 .

[29]  J. Fyles,et al.  Effect of snow removal on leaf water potential, soil moisture, leaf and soil nutrient status and leaf peroxidase activity of sugar maple , 1994, Plant and Soil.

[30]  P. Mellander,et al.  Impacts of seasonal air and soil temperatures on photosynthesis in Scots pine trees. , 2002, Tree physiology.

[31]  Tingjun Zhang,et al.  Snow density climatology across the former USSR , 2013 .

[32]  M. Molen,et al.  Interannual variation of water balance and summer evapotranspiration in an eastern Siberian larch forest over a 7-year period (1998-2006) , 2008 .

[33]  Jeroen C. J. H. Aerts,et al.  Sensitivity of global river discharges under Holocene and future climate conditions , 2006 .

[34]  U. Herzschuh,et al.  Evaporation effects as reflected in freshwaters and ostracod calcite from modern environments in Central and Northeast Yakutia (East Siberia, Russia) , 2008, Hydrobiologia.

[35]  M. Ishikawa,et al.  Hydrothermal regimes of the dry active layer , 2006 .

[36]  Christiane Schmullius,et al.  Extreme fire events are related to previous-year surface moisture conditions in permafrost-underlain larch forests of Siberia , 2012 .

[37]  Kazuyoshi Suzuki,et al.  Sublimation from snow surface in southern mountain taiga of eastern Siberia , 2004 .

[38]  Guido Grosse,et al.  Modern thermokarst lake dynamics in the continuous permafrost zone, northern Seward Peninsula, Alaska , 2011 .

[39]  T. Yamazaki,et al.  Tempo-spatial characteristics of energy budget and evapotranspiration in the eastern Siberia , 2008 .

[40]  Y. Iijima,et al.  Snow disappearance in Eastern Siberia and its relationship to atmospheric influences , 2007 .

[41]  M. Waterloo,et al.  Net ecosystem exchange of carbon dioxide and water of far eastern Siberian Larch (Larix cajanderii) on permafrost , 2004 .