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影响因子：5.148

DOI码：10.1175/JCLI-D-20-0226.1

发表刊物：Journal of Climate

刊物所在地：美国

摘要：This study investigates eastward-moving summer heavy rainfall events in the lower reaches of the Yangtze River (LRYR), which are associated with the Tibetan Plateau (TP) vortices. On the basis of rainfall data from gauges and additional atmospheric data from ERA-Interim, the dynamic and thermodynamic effects of moisture transport and diabatic heating are estimated to determine the physical mechanisms that support the eastward-moving heavy rainfall events. As the rainband moves eastward, it is accompanied by anomalous cyclonic circulation in the upper and middle troposphere and enhanced vertical motion throughout the troposphere. In particular, the rainfall region is located in the fore of the upper-level trough, which is ideal for baroclinic organization of the convective system and further development of the eastward-moving vortex. The large atmospheric apparent heat source (Q1) also contributes for lifting the lower-level air into the upper atmosphere and for enhancing the low-level convective motion and convergence during the heavy rainfall process. Piecewise potential vorticity inversion further verifies the crucial role that the diabatic heating played in developing the anomalous geopotential height favorable for the enhanced rainfall. The combined action of the dynamic and thermodynamic processes, as well as the rich moisture supply from the seas, synergistically sustained and enhanced the eastward-moving rainfall.

全部作者：Zhao Y., Chen D., Deng Y., Son S.-W., Wang X., Di D., Pan M., Ma, X.

第一作者：Yang Zhao

论文编号：10.1175/JCLI-D-20-0226.1

卷号：34

期号：2

页面范围：607-620

ISSN号：0894-8755

是否译文：否

发表时间：2020-01-01