globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2334-y
Scopus记录号: 2-s2.0-84929701921
论文题名:
Influences of northward propagating 25–90-day and quasi-biweekly oscillations on eastern China summer rainfall
作者: Chen J.; Wen Z.; Wu R.; Chen Z.; Zhao P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期:2017-01-02
起始页码: 105
结束页码: 124
语种: 英语
英文关键词: 25–90-day and quasi-biweekly oscillations ; Eastern China summer rainfall ; Interdecadal changes ; Northward propagation
英文摘要: The present study reveals that rainfall anomalies associated with the 25–90-day (quasi-biweekly) tropical convective activity propagates northward (northwestward) into northern China (the Yangtze River). Enhanced rainfall over southern China results directly from enhanced convection propagating northward from the South China Sea (SCS)–western north Pacific (WNP), strengthened northward water vapor transport and intensified upper-level divergence. The anomalous anticyclone over SCS–WNP, which is induced by local lower sea surface temperature, provides a favorable condition for transporting more moisture to southern China. Stronger subtropical westerly jet and South Asia high strengthen upper-level divergence. The northward propagating 25–90-day oscillation over eastern China reaches farther north than the quasi-biweekly oscillation (QBWO). The intensity of QBWO in summer rainfall has significantly strengthened over southern China after 1993 but not for the 25–90-day oscillation. This is mainly contributed by an interdecadal increase in rainfall over southern China and the Yangtze River Basin in the wet phases of QBWO. The interdecadal enhancement of rainfall associated with the QBWO is attributed to three factors. One is lower tropospheric convergence caused by anomalous anticyclone over the WNP and anomalous cyclone over Korean Peninsula and Japan. The second is upper tropospheric divergence resulting from strengthening of subtropical westerly jet and the South Asia high. The last is enhanced ascent over South China through meridional vertical circulation. © 2014, Springer-Verlag Berlin Heidelberg.
资助项目: NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China ; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54015
Appears in Collections:过去全球变化的重建

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作者单位: Center for Monsoon and Environment Research/Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, China; Institute of Space and Earth Information Science and Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Jiangsu Collaborative Innovation Center for Climate Change, Nanjing, China

Recommended Citation:
Chen J.,Wen Z.,Wu R.,et al. Influences of northward propagating 25–90-day and quasi-biweekly oscillations on eastern China summer rainfall[J]. Climate Dynamics,2015-01-01,45(2017-01-02)
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