|
|
|
| Associations between the Autumn Arctic Sea Ice and North American Winter Precipitation |
| SONG Mi-Rong,LIU Ji-Ping,LIU Hai-Long,REN Xiao-Bo,WANG Xiu-Cheng |
| State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Graduate University of Chinese Academy of Sciences, Beijing 100049;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Meteorological Center, Northwest Regional Air Traffic Management Bureau of Civil Aviation of China, Xi’an 710082 |
|
|
|
|
Abstract 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 SIC and North American winter precipitation. This relationship suggests a potential long-term outlook for the North American winter precipitation.
|
|
Received: 22 December 2011
Revised: 18 January 2012
Accepted: 22 February 2012
|
|
|
|
|
|
|
