An increasingly warm and ice-free Arctic Ocean has, in recent decades, led to more moisture in higher latitudes. This moisture is transported south by cyclonic weather systems where it precipitates as snow, influencing the global hydrological cycle and many terrestrial systems that depend on it. Credit: Tomonori Sato
Because of global warming, air temperatures are rising, which leads to the melting of glaciers and polar ice caps. Yet, seemingly paradoxically, snow cover in some areas in northern Eurasia has increased over the past decades. However, snow is a form of water. Because global warming increases the quantity of moisture in the atmosphere, it also, therefore, increases the quantity and likelihood of rain and snow.
Importantly, this development coincides with the area where sea ice retreat has been strongest over the time frame of the study. In addition, the quantitative model shows that evaporation and snowfall are especially strong during certain weather events such as cyclonic systems taking up unusually large quantities of moisture and transporting them south into Siberia, thus also highlighting detailed and specific mechanistic insights into the weather dynamics of the region.
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