Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns

Based on the Lagrangian particle dispersion model, HYSPLIT 4.9, this study analyzed the summertime atmospheric moisture sources and transportation pathways affecting six subregions across China. The sources were: Midlatitude Westerly (MLW), Siberian-Arctic regions (SibArc), Okhotsk Sea (OKS), Indian...

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Autores principales:	Ruonan Zhang, QuCheng Chu, Zhiyan Zuo, Yanjun Qi
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	moisture source atmospheric wave trains east asian summer monsoon Pacific-Japan teleconnection Indian summer monsoon Science Q
Acceso en línea:	https://doaj.org/article/9aeb4cf3d8ca4f3f85d3598481d7bd85
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spelling	oai:doaj.org-article:9aeb4cf3d8ca4f3f85d3598481d7bd852021-11-19T05:44:21ZSummertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns2296-646310.3389/feart.2021.756943https://doaj.org/article/9aeb4cf3d8ca4f3f85d3598481d7bd852021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.756943/fullhttps://doaj.org/toc/2296-6463Based on the Lagrangian particle dispersion model, HYSPLIT 4.9, this study analyzed the summertime atmospheric moisture sources and transportation pathways affecting six subregions across China. The sources were: Midlatitude Westerly (MLW), Siberian-Arctic regions (SibArc), Okhotsk Sea (OKS), Indian Ocean (IO), South China Sea (SCS), Pacific Ocean (PO), and China Mainland (CN). Furthermore, the relative contributions of these seven moisture sources to summertime precipitation in China were quantitatively assessed. Results showed that the CN precipitation source dominates the interannual and interdecadal variation of precipitation in most subregions, except Southwest and South China. The Northeast China vortex and Pacific–Japan (PJ) teleconnection, which transport water vapor from the MLW, OKS and PO sources, are crucial atmospheric systems and patterns for the variation of precipitation in Northeast China. The interannual variation of precipitation in Northwest and North China is mainly dominated by mid–high-latitude Eurasian wave trains, which provide the necessary dynamical conditions and associated moisture transport from the MLW and SibArc sources. In addition, an enhanced western North Pacific subtropical high (WNPSH) accompanied by the East Asian–western North Pacific summer monsoon and PJ teleconnection, transports extra moisture to North China from the SCS and PO sources, as well to the Yangtze River Valley and South China. The Indian summer monsoon (ISM) is also critically important for the interdecadal change in precipitation over the Yangtze River Valley and South China, via the southwesterly branch of moisture transport from the IO source. The interdecadal changes in precipitation over Southwest China are determined by the IO and SCS sources, via enhanced WNPSH coupling with a weakened ISM. These results suggest that the interdecadal and interannual variations of moisture sources contribute to the attendant variation of summertime precipitation in China via large-scale circulation regimes in both the mid–high and lower latitudes.Ruonan ZhangRuonan ZhangQuCheng ChuZhiyan ZuoZhiyan ZuoYanjun QiFrontiers Media S.A.articlemoisture sourceatmospheric wave trainseast asian summer monsoonPacific-Japan teleconnectionIndian summer monsoonScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	moisture source atmospheric wave trains east asian summer monsoon Pacific-Japan teleconnection Indian summer monsoon Science Q
spellingShingle	moisture source atmospheric wave trains east asian summer monsoon Pacific-Japan teleconnection Indian summer monsoon Science Q Ruonan Zhang Ruonan Zhang QuCheng Chu Zhiyan Zuo Zhiyan Zuo Yanjun Qi Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
description	Based on the Lagrangian particle dispersion model, HYSPLIT 4.9, this study analyzed the summertime atmospheric moisture sources and transportation pathways affecting six subregions across China. The sources were: Midlatitude Westerly (MLW), Siberian-Arctic regions (SibArc), Okhotsk Sea (OKS), Indian Ocean (IO), South China Sea (SCS), Pacific Ocean (PO), and China Mainland (CN). Furthermore, the relative contributions of these seven moisture sources to summertime precipitation in China were quantitatively assessed. Results showed that the CN precipitation source dominates the interannual and interdecadal variation of precipitation in most subregions, except Southwest and South China. The Northeast China vortex and Pacific–Japan (PJ) teleconnection, which transport water vapor from the MLW, OKS and PO sources, are crucial atmospheric systems and patterns for the variation of precipitation in Northeast China. The interannual variation of precipitation in Northwest and North China is mainly dominated by mid–high-latitude Eurasian wave trains, which provide the necessary dynamical conditions and associated moisture transport from the MLW and SibArc sources. In addition, an enhanced western North Pacific subtropical high (WNPSH) accompanied by the East Asian–western North Pacific summer monsoon and PJ teleconnection, transports extra moisture to North China from the SCS and PO sources, as well to the Yangtze River Valley and South China. The Indian summer monsoon (ISM) is also critically important for the interdecadal change in precipitation over the Yangtze River Valley and South China, via the southwesterly branch of moisture transport from the IO source. The interdecadal changes in precipitation over Southwest China are determined by the IO and SCS sources, via enhanced WNPSH coupling with a weakened ISM. These results suggest that the interdecadal and interannual variations of moisture sources contribute to the attendant variation of summertime precipitation in China via large-scale circulation regimes in both the mid–high and lower latitudes.
format	article
author	Ruonan Zhang Ruonan Zhang QuCheng Chu Zhiyan Zuo Zhiyan Zuo Yanjun Qi
author_facet	Ruonan Zhang Ruonan Zhang QuCheng Chu Zhiyan Zuo Zhiyan Zuo Yanjun Qi
author_sort	Ruonan Zhang
title	Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
title_short	Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
title_full	Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
title_fullStr	Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
title_full_unstemmed	Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns
title_sort	summertime moisture sources and transportation pathways for china and associated atmospheric circulation patterns
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/9aeb4cf3d8ca4f3f85d3598481d7bd85
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Summertime Moisture Sources and Transportation Pathways for China and Associated Atmospheric Circulation Patterns

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