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

合作研究：积雪对北半球气候变化的影响

• 批准号: 0127667
• 负责人: Dara Entekhabi
• 金额: $ 13.6万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-15 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0127667&HistoricalAwards=false
• 关键词: Collaborative; Research; Influence; Snow; Cover

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.

在他们以前的资助下，PI已经表明，由于雪引起的地表非绝热热异常对大气动力学有着巨大而广泛的影响，特别是在北方半球（NH）的中高纬度地区。该奖项下的工作将研究积雪在迫使或触发北半球冬季气候变化的主导模式中的作用。将遵循两条平行的研究路径：（i）通过观测分析重点关注欧亚积雪与冬季气候之间的关系;（ii）使用大气环流模型研究因果机制。这项工作很重要，因为它将加强对北半球冬季气候变化的了解，从而提高季节性预报的潜力。这具有很大的社会效益。