Journal article

Impact of Ural Blocking on Winter Warm Arctic-Cold Eurasian Anomalies. Part II: The Link to the North Atlantic Oscillation

Dehai Luo, Yiqing Xiao, Yina Diao, Aiguo Dai, Christian LE Franzke, Ian Simmonds

JOURNAL OF CLIMATE | AMER METEOROLOGICAL SOC | Published : 2016

Abstract

In Part I of this study, the Ural blocking (UB)-induced amplification role of winter warm Arctic-cold Eurasian (WACE) anomalies has been examined. It was found that the long-lived UB together with the positive North Atlantic Oscillation (NAO+) significantly contributes to the amplification of the WACE pattern. The present study examines how the UB variability affects quasi-biweekly WACE (QB-WACE) anomalies and depends on the NAO+ and North Atlantic conditions by classifying the UB based on a case study of a cold event that occurred over southern China in January 2008. A composite analysis during 1979-2013 shows that the QB-WACE anomalies associated with the UB that often occur with the NAO+ ..

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University of Melbourne Researchers

Grants

Awarded by National Science Foundation of China


Awarded by National Basic Research Program of China


Awarded by U.S. National Science Foundation


Awarded by U.S. Department of Energy's Office of Science


Awarded by U.S. National Oceanic and Atmospheric Administration


Awarded by German Research Foundation (DFG) through the cluster of excellence CliSAP at the University of Hamburg


Funding Acknowledgements

The authors acknowledge the support from the National Science Foundation of China (Grants 41375067 and 41430533) and the National Basic Research Program of China (2015CB953903). A. Dai is supported by the U.S. National Science Foundation (Grant AGS-1353740), the U.S. Department of Energy's Office of Science (Award DE-SC0012602), and the U.S. National Oceanic and Atmospheric Administration (Award NA15OAR4310086). C. Franzke was supported by the German Research Foundation (DFG) through the cluster of excellence CliSAP (EXC 177) at the University of Hamburg. I. Simmonds is supported by Australian Research Council Grant DP 160101997. The authors thank three anonymous reviewers and Prof. Walsh, whose comments improved this paper, and Dr. Y. Yao, who plotted Fig. 16.