Observed Influences of Autumn-Early Winter Eurasian Snow Cover Anomalies on the Hemispheric PNA-like Variability in Winter

被引：33
|
作者：
Wu, Qigang [1 ]
Hu, Haibo [1 ]
Zhang, Lujun [1 ]
机构：
[1] Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China
来源：
JOURNAL OF CLIMATE | 2011年 / 24卷 / 07期
基金：
中国国家自然科学基金;
关键词：
NORTHERN-HEMISPHERE; ATMOSPHERIC CIRCULATION; SUMMER MONSOON; ATLANTIC SST; CLIMATE; STRATOSPHERE; ENSEMBLE; SEESAW;
D O I：
10.1175/2011JCLI4236.1
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The impact of the Eurasian snow cover extent on the Northern Hemisphere (NH) circulation is investigated by applying a lagged maximum covariance analysis (MCA) to monthly satellite-derived snow cover and NCEP reanalysis data. Wintertime atmospheric signals significantly correlated with persistently autumn early winter snow cover anomalies are found in the leading two MCA modes. The first MCA mode indicates the effect of Eurasian snow cover anomalies on the Arctic Oscillation/North Atlantic Oscillation (AO/NAO). The second MCA mode corresponds with the forcing of Eurasian snow cover anomalies on the hemispheric Pacific North America (PNA)-like atmospheric variations. This snow atmosphere relationship may present a significant potential for wintertime predictability.
引用
收藏
页码：2017 / 2023
页数：7
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