Collaborative Research: The Influence of Snow Cover on Northern Hemisphere Climate Variability

在先前的资助下，pi已经表明，由于雪引起的地表非绝热异常对大气动力学具有巨大而广泛的影响，特别是在北半球的中高纬度地区。该奖项下的工作将研究积雪在强迫或触发北半球冬季气候变率的主要模式中的作用。今后将沿着两条平行的研究路径：(1)通过观测分析，重点研究欧亚大陆积雪与冬季气候的关系；（二）利用循环模型研究因果机制。这项工作很重要，因为它将加强对北半球冬季气候变率的了解，从而提高季节预报的潜力。这具有巨大的社会效益。

Under their previous grant, the PIs have shown that diabatic heat anomalies at the surface due to snow have large and extensive impacts on atmospheric dynamics, especially in mid- to high-latitudes of the Northern Hemisphere (NH). Work under this award will examine the role of snow cover in forcing or triggering the dominant mode of variability of NH winter climate. Two parallel paths of research will be followed: (i) to focus on the relationship between Eurasian snow cover and winter climate through observational analysis; and (ii) to study cause and effect mechanisms using general circulation modeling. The work is important because it will enhance understanding of NH winter climate variability, and consequently, the potential of improved seasonal forecasting. This has great societal benefits.