Northern-Hemisphere Snow Cover Patterns and Formation Conditions in Winter 2007 and 2012

作     者：CUI Hongyan QIAO Fangli SHU Qi YU Long 

作者机构：College of Oceanic and Atmospheric Sciences Ocean University of China The First Institute of OceanographyState Oceanic Administration College of Mathematics and Physics Qingdao University of Science and Technology Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2016年第15卷第3期

页      面：407-413页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 070601[理学-气象学] 0815[工学-水利工程] 0706[理学-大气科学] 0824[工学-船舶与海洋工程] 

基　　金：supported by the Project of Comprehensive Evaluation of Polar Areas on Global and Regional Climate Changes (CHINARE2015-04-04) the National Natural Science Foundation of China (Grant No. 41406027) the NSFC-Shandong Joint Fund for Marine Science Research Centers (Grant No. U1406404) the international cooperation project of Indo-Pacific ocean environment variation and air-sea interaction (Grant No. GASI-03-IPOVAI-05) 

主　　题：snow cover anomaly atmospheric circulation cyclonic wind anomaly low air temperature 

摘      要：The Arctic sea ice minimum records appeared in the Septembers of 2007 and 2012, followed by high snow cover areas in the Northern Hemisphere winters. The snow cover distributions show different spatial patterns in these two years: increased snow cover in Central Asia and Central North America in 2007, while increased snow cover in East Asia and northwestern Europe in 2012. The high snow cover anomaly shifted to higher latitudes in winter of 2012 compared to 2007. It is noticed that the snow cover had positive anomaly in 2007 and 2012 with the following conditions: the negative geopotential height and the related cyclonic wind anomaly were favorable for upwelling, and, with the above conditions, the low troposphere and surface air temperature anomaly and water vapor anomaly were favorable for the formation and maintenance of snowfalls. The negative geopotential height, cyclonic wind and low air temperature conditions were satisfied in different locations in 2007 and 2012, resulting in different spatial snow cover patterns. The cross section of lower air temperature move to higher latitudes in winter of 2012 compared to 2007.