Winter rain on snow and its association with air temperature in northern Eurasia

This study examines the characteristics of winter (Dec–Feb) rain-on-snow events and their relationship to surface air temperatures to reveal potential changes in rain-on-snow days under a warming climate over northern Eurasia. We found that rain-on-snow events mostly occur over European Russia during winter. Rain-on-snow days increase as air temperature increases and are primarily attributable to the increase in rainfall days. Air temperature is the primary cause for these changes, while the North Atlantic Oscillation has some influence on the rain on snow and rainfall over the northern part of European Russia. The magnitude of rain-on-snow increase ranges from 0·5 day to 2·5 days per degree Celsius increase in air temperature. Higher rates of increase in rain-on-snow days occur in the northern and eastern parts of European Russia where the air temperature is lower, in contrast to rainfall days which have higher rates at locations with higher air temperatures. This suggests that a decrease in snowfall days might be limiting the rate of increase in rain-on-snow events over warmer regions where the temperature is about − 8 °C or higher. This study also implies that rain-on-snow days will become more common over regions in which it is currently a rare event as air temperatures increase. Copyright © 2008 John Wiley & Sons, Ltd.

[1]  R. Barry,et al.  Statistics and characteristics of permafrost and ground-ice distribution in the Northern Hemisphere , 1999 .

[2]  J. Hurrell.  Decadal Trends in the North Atlantic Oscillation: Regional Temperatures and Precipitation , 1995, Science.

[3]  A. H. Auer.  The Rain versus Snow Threshold Temperatures , 1974 .

[4]  Richard B. Lammers,et al.  Increasing River Discharge to the Arctic Ocean , 2002, Science.

[5]  T. G. Smith,et al.  Implications of Warm Temperatures and an Unusual Rain Event for the Survival of Ringed Seals on the Coast of Southeastern Baffin Island , 2004 .

[6]  David A. Robinson,et al.  Recent variations and regional relationships in Northern Hemisphere snow cover , 1995, Annals of Glaciology.

[7]  Hengchun Ye,et al.  Characteristics of Winter Precipitation Variation over Northern Central Eurasia and Their Connections to Sea Surface Temperatures over the Atlantic and Pacific Oceans , 2001 .

[8]  R. Barry,et al.  Icelandic low cyclone activity : Climatological features, linkages with the NAO, and relationships with recent changes in the Northern Hemisphere circulation , 1997 .

[9]  Xuebin Zhang,et al.  The Impact of Climatic Conditions on Seasonal River Discharges in Siberia , 2004 .

[10]  J. Sui,et al.  Rain-on-snow induced flood events in Southern Germany , 2001 .

[11]  T. V. Ommen,et al.  Observed climate variability and change , 2002 .

[12]  Mark C. Serreze,et al.  Modeling evidence for recent warming of the Arctic soil thermal regime , 2004 .

[13]  G. Roe,et al.  Rain‐on‐snow events impact soil temperatures and affect ungulate survival , 2003 .

[14]  L. Hinzman,et al.  Long-term annual water balance analysis of the Lena River , 2005 .

[15]  H. Ye.  Quasi-Biennial and Quasi-Decadal Variations in Snow Accumulation over Northern Eurasia and Their Connections to the Atlantic and Pacific Oceans , 2001 .

[16]  P. Jones,et al.  Extension to the North Atlantic oscillation using early instrumental pressure observations from Gibraltar and south‐west Iceland , 1997 .

[17]  Lee Slater,et al.  Spatial variability in biogenic gas accumulations in peat soils is revealed by ground penetrating radar (GPR) , 2005 .

[18]  Martyn P. Clark,et al.  Rain-on-Snow Events in the Western United States , 2007 .

[19]  E. Reimers.  WINTER MORTALITY AND POPULATION TRENDS OF REINDEER ON SVALBARD, NORWAY , 1982 .

[20]  J. Buttle,et al.  The contribution of rain-on-snow events to annual NO3-N export from a forested catchment in south-central Ontario, Canada , 2007 .

[21]  H. Ye.  Changes in Frequency of Precipitation Types Associated with Surface Air Temperature over Northern Eurasia during 1936–90 , 2008 .

[22]  D. Kaiser,et al.  Six- and three-hourly meteorological observations from 223 USSR stations , 1995 .

[23]  Ross D. Brown,et al.  Interannual variability in reconstructed Canadian snow cover, 1915-1992 , 1996 .

[24]  B. Sæther,et al.  Effects of density-dependence and climate on the dynamics of a Svalbard reindeer population , 2001 .

[25]  Syukuro Manabe,et al.  Simulated long-term changes in river discharge and soil moisture due to global warming / Simulations à long terme de changements d’écoulement fluvial et d’humidité du sol causés par le réchauffement global , 2004 .

[26]  Raymond F. Kokaly,et al.  Diagnosis of the record minimum in Arctic sea ice area during 1990 and associated snow cover extremes , 1995 .

[27]  Florence Fetterer,et al.  Tracking the Arctic's shrinking ice cover: Another extreme September minimum in 2004 , 2005 .

[28]  H. Ye.  Increases in snow season length due to earlier first snow and later last snow dates over north central and northwest Asia during 1937–94 , 2001 .

[29]  Pratap Singh,et al.  Hydrological response of snowpack under rain-on-snow events: a field study , 1997 .

[30]  N. Kouwen,et al.  Surface temperature adjustments to improve weather radar representation of multi-temporal winter precipitation accumulations , 2001 .

[31]  D. Bromwich,et al.  Large‐scale hydro‐climatology of the terrestrial Arctic drainage system , 2002 .

[32]  Douglas L. Kane,et al.  Siberian Lena River hydrologic regime and recent change , 2002 .

[33]  H. Ye,et al.  Changes in transitional snowfall season length in northern Eurasia , 2003 .

[34]  H. Ye,et al.  The Changes in Russian Winter Snow Accumulation during 1936–83 and Its Spatial Patterns , 1998 .

[35]  Ross D. Brown,et al.  Spatial and temporal variability of Canadian monthly snow depths, 1946–1995 , 1998 .

[36]  Anne Gunn,et al.  The Recent Decline of Peary Caribou on Western Queen Elizabeth Islands of Artic Canada , 1975 .