Rain-on-snow events impact soil temperatures and affect ungulate survival

Physics

Scientific paper

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Hydrology: Frozen Ground, Hydrology: Snow And Ice (1827), Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions, Meteorology And Atmospheric Dynamics: Polar Meteorology, Meteorology And Atmospheric Dynamics: Precipitation (1854)

Scientific paper

Field data from Spitsbergen and numerical modeling reveal that rain-on-snow (ROS) events can substantially increase sub-snowpack soil temperatures. However, ROS events have not previously been accounted for in high latitude soil thermal analyses. Furthermore such events can result in widespread die-offs of ungulates due to soil surface icing. The occurrence of Spitsbergen ROS events is controlled by the North Atlantic Oscillation. Globally, atmospheric reanalysis data show that significant ROS events occur predominantly over northern maritime climates, covering 8.4 × 106 km2. Under a standard climate change scenario, a global climate model predicts a 40% increase in the ROS area by 2080-2089.

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