Modulation of monthly precipitation patterns over East China by the Pacific Decadal Oscillation

Qing Yang, Zhuguo Ma () and Baoliang Xu
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Qing Yang: Chinese Academy of Sciences
Zhuguo Ma: Chinese Academy of Sciences
Baoliang Xu: Chinese Academy of Sciences

Climatic Change, 2017, vol. 144, issue 3, No 3, 405-417

Abstract: Abstract Previous studies suggest that the Pacific Decadal Oscillation (PDO) modulates annual and summer precipitation patterns over East China. In this study, the effect of the PDO on monthly precipitation anomalies over this region is investigated. The new results show that the effect is month-dependent. The well-known North–South dipole patterns of annual precipitation are dominated by the July–August precipitation. In other months, the corresponding patterns vary in strength, position, and even shape. For example, the May and June precipitation patterns show opposite signs to the July–August or annual mean patterns, whereas the September–December monthly precipitation anomalies show a triple pattern. Monthly precipitation patterns over East China are largely determined by large-scale moisture transport controlled by atmospheric circulation. The PDO affects East China precipitation patterns by modulating the large-scale circulation pattern.

Date: 2017
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DOI: 10.1007/s10584-016-1662-9

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