Associations between the Autumn Arctic Sea Ice and North American Winter Precipitation  

作　　者：SONG Mi-Rong LIU Ji-Ping LIU Hai-Long REN Xiao-Bo WANG Xiu-Cheng 

机构地区：[1]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China [4]Meteorological Center, Northwest Regional Air Traffic Management Bureau of Civil Aviation of China, Xi＇an 710082, China

出　　处：《Atmospheric and Oceanic Science Letters》2012年第3期212-218,共7页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China (2011CB30970);the National Natural Science Foundation of China (41176169 and 40930848)

摘　　要：Associations between the autumn Arctic sea ice concentrations (SICs) and North American winter precipitation were examined using singular value decomposition. The results show that a reduced SIC in the majority of the Arctic is accompanied by dry conditions over the Great Plains, the southern United States, Mexico, eastern Alaska, and southeastern Greenland, and by wet conditions over the majority of Canada, the northeastern United States, and the majority of Greenland. Atmospheric circulation anomalies associated with the SIC variability show a wave train structure that is persistent from autumn to winter and is responsible for the covariability between the autumn Arctic SICs and North American winter precipitation. This relationship suggests a potential long-term outlook for the North American winter precipitation.Associations between the autumn Arctic sea ice concentrations （SICs） and North American winter precipitation were examined using singular value decomposition. The results show that a reduced SIC in the majority of the Arctic is accompanied by dry conditions over the Great Plains, the southern United States, Mexico, eastern Alaska, and southeastern Greenland, and by wet conditions over the majority of Canada, the northeastern United States, and the majority of Greenland. Atmospheric circulation anomalies associated with the SIC variability show a wave train structure that is persistent from autumn to winter and is responsible for the covariability between the autumn Arctic SICs and North American winter precipitation. This relationship suggests a potential long-term outlook for the North American winter precipitation.

关 键 词：Arctic sea ice North American precipitation singular value decomposition 

分 类 号：P458.121[天文地球—大气科学及气象学] P434