Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2021.105609 |
Footprints of Pacific Decadal Oscillation in the interdecadal variation of Consecutive Cloudy–Rainy Events in Southern China | |
Letian Gu, Jianqi Sun, Shui Yu, Mengqi Zhang | |
2021-03-26 | |
发表期刊 | Atmospheric Research |
出版年 | 2021 |
英文摘要 | Consecutive Cloud-Rainy Events (CCREs) in spring have a disastrous impact on agriculture and the natural ecosystem over southern China. In this study, the variability of the frequency of spring CCREs in southern China from 1961 to 2016 and the underlying mechanism of these phenomena are explored. The results indicate that the dominant mode of the CCRE frequency in southern China varies in a uniform spatial pattern, and the time series exhibits a strong interdecadal variation, with a higher frequency between the late 1970s and late 1990s and a lower frequency in the other periods. Such an interdecadal variation in the CCRE frequency varies well in–phase with the Pacific Decadal Oscillation (PDO). Further dynamic diagnosis and numerical simulation both suggest that the PDO is linked with CCREs in southern China through two physical processes. On the one hand, the anomalous PDO is associated with the anomalous North Pacific Oscillation (NPO). The westward extension of the NPO is accompanied by anomalous East Asian westerly jet (EAWJ) and West Pacific subtropical high (WPSH). On the other hand, the eastward development process associated with the PDO variation can excite a Rossby wave train over the Northern Hemispheric mid-latitudes. The PDO-related Rossby wave train can alter East Asian atmospheric circulations, leading to anomalous EAWJ. The changes in the EAWJ and WPSH can further lead to anomalous upward motion over southern China and moisture transportation from the South China Sea to southern China. Through these physical processes, the positive–phase (negative–phase) PDO provides a favorable (unfavorable) condition for the occurrence of CCREs in southern China. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/320879 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Letian Gu, Jianqi Sun, Shui Yu, Mengqi Zhang. Footprints of Pacific Decadal Oscillation in the interdecadal variation of Consecutive Cloudy–Rainy Events in Southern China[J]. Atmospheric Research,2021. |
APA | Letian Gu, Jianqi Sun, Shui Yu, Mengqi Zhang.(2021).Footprints of Pacific Decadal Oscillation in the interdecadal variation of Consecutive Cloudy–Rainy Events in Southern China.Atmospheric Research. |
MLA | Letian Gu, Jianqi Sun, Shui Yu, Mengqi Zhang."Footprints of Pacific Decadal Oscillation in the interdecadal variation of Consecutive Cloudy–Rainy Events in Southern China".Atmospheric Research (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论