Abstract
AbstractThe South China Sea (SCS) serves as the main source of moisture for rainfall in Southern China (SC) and the meridional moisture transport to SC is dominated by wind changes during the first rainy season (April–June). El Niño-Southern Oscillation (ENSO) and Tropical Northwestern Pacific (TNWP) variability modulate the SC rainfall through anomalous anticyclonic circulation over the western North Pacific by strengthening the SCS meridional moisture transport to SC. However, our study indicates that the SCS is not only the intermediary in which ENSO or the TNWP affects the SC rainfall but also plays an independent role in the modulation of the SC rainfall. Notably, the SCS meridional moisture transport has a lower impact on the SC rainfall during the second rainy season (July–September), especially in July. At that time, the main cause of the SC rainfall is the southward moisture flux anomaly across its northern boundary with the anomalous cyclone over SC. This cyclone suppresses the moisture flux out of SC and leads to moisture convergence in SC. Moreover, we present a new concept by analyzing internal differences of moisture circulation during the second rainy season. Either strengthening the meridional moisture flux into SC across its southern boundary or suppressing the moisture flux out of SC across its northern boundary is important depending on whether or not the moisture from the SCS can converge in SC, which is mainly determined by the amplitude of moisture transport fluxes in SC.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory
Strategic Priority Research Program of the Chinese Academy of Sciences
Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences
Leading Talents Program of Guangdong Province
Publisher
Springer Science and Business Media LLC
Reference47 articles.
1. Adler RF, Sapiano MRP, Huffman GJ et al (2018) The Global Precipitation Climatology Project (GPCP) monthly analysis (New Version 2.3) and a review of 2017 global precipitation. Atmosphere (Basel). https://doi.org/10.3390/atmos9040138
2. Berrisford P, Dee D, Fielding K et al (2009) ERA report series - the ERA-Interim archive Version 1.0. Weather 16
3. Chen SX, Gao SF, Yang S (1983) The source of water vapor in the southern part of China in May and June and its abnormality. Proceedings of the symposium on the summer monsoon in South East Asia (in Chinese). People's Press of Yunnan Province 97–110
4. Chen M, Xie P, Janowiak JE (2002) Global land precipitation: a 50-yr monthly analysis based on gauge observations. J Hydrometeorol 3:249–266. https://doi.org/10.1175/1525-7541(2002)003%3c0249:GLPAYM%3e2.0.CO;2
5. Chen CS, Lin KP, Wang PX (2004) Relation between pre-flood season precipitation anomalies in South China and water Vapor Transportation (in Chinese). J Nanjing Inst Meteorol 27(6):721–727
Cited by
27 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献