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

机译:太平洋二等振动振荡对华东地区月度降水模式的调制

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Heading>Abstract/Heading>Para ID="Par1">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鈥揝outh dipole patterns of annual precipitation are dominated by the July鈥揂ugust 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鈥揂ugust or annual mean patterns, whereas the September鈥揇ecember 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./Para>
机译:&标题>抽象& /标题>& para id =“par1”>以前的研究表明,太平洋二数振荡(PDO)调制了华东地区的年夏季降水模式。在这项研究中,研究了PDO对该地区的月度降水异常的影响。新结果表明,效果是依赖于月份。众所周知的北鈥揝oveh偶极模式的年降水量是7月鈥揂ugust降水的主导。在其他几个月内,相应的图案在强度,位置和甚至形状中变化。例如,5月和六月降水模式显示了7月鈥揂UGUST或年平均模式的相反迹象,而9月鈥揇九月月度降水异常表现出三重模式。华东地区的月度降水模式主要取决于由大气循环控制的大规模水分运输。通过调制大规模循环模式,PDO影响了华东降水模式。& / para>

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