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DOI: 10.1002/joc.5895
Scopus ID: 2-s2.0-85056260592
Title:
Synoptic patterns and sounding-derived parameters associated with summertime heavy rainfall in Beijing
Author: Yan Y.; Miao Y.; Guo J.; Liu S.; Liu H.; Lou M.; Liu L.; Chen D.; Xue W.; Zhai P.
Source Publication: International Journal of Climatology
ISSN: 8998418
Indexed By: SCI ; SCI-E ; EI
Publishing Year: 2019
Volume: 39, Issue:3
pages begin: 1476
pages end: 1489
Language: 英语
Keyword: heavy rainfall ; inverted V sounding ; loaded gun sounding ; synoptic pattern ; thin tube sounding
Scopus Keyword: Principal component analysis ; Troposphere ; Heavy rainfall ; inverted V sounding ; loaded gun sounding ; synoptic pattern ; Thin tubes ; Rain
English Abstract: Heavy precipitation in Beijing is modulated by both synoptic forcings and local thermodynamic characteristics of troposphere, which has yet to be well known. This study investigated the large-scale synoptic patterns and local sounding features associated with the summertime heavy precipitation in Beijing, based on long-term surface meteorological observations, radiosonde measurements, in combination of reanalysis data from 2008 to 2017. The results show that the heavy rainfall occurs more frequently in late July, which is associated with the movement of subtropical anticyclone. The sounding parameters during the heavy rainfall days are examined as well. It is found that the heavy rainfall is often related to favourable convective conditions characterized by abundant water vapour and high unstable energy. The soundings for around 45% of heavy rainfall days in Beijing exhibit the pattern of “thin tube” (TT), and those for ~25 and ~20% of heavy rainfall days show the patterns of “loaded gun” (LG) and “inverted V” (IV), respectively. On average, the rainfall amount of TT is 55.8 mm/day, which is ~3 mm/day (~15 mm/day) higher than that of LG (IV). The more frequent and heavier rainfall observed for TT pattern is due to the high values of precipitable water and wind shear. On the large scale, three dominant synoptic patterns associated with heavy rainfall in Beijing have been identified using the T-mode principle component analysis. These synoptic patterns are all characterized by prevailing southerly winds within the lower troposphere, resulting in water vapours being easily transported from southern regions to Beijing, which in turn favours the occurrence of heavy precipitation. These dominant synoptic patterns and thermodynamic characteristics associated with the heavy rainfall in Beijing revealed in this study have important implications for better understanding of heavy rainfall in the North China Plain. © 2018 Royal Meteorological Society
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被引频次[WOS]:1   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/116540
Appears in Collections:全球变化的国际研究计划

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Affiliation: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Department of Atmospheric and Oceanic Sciences, Peking University, Beijing, China; Nanjing University of Information Science & Technology, Nanjing, China

Recommended Citation:
Yan Y.,Miao Y.,Guo J.,et al. Synoptic patterns and sounding-derived parameters associated with summertime heavy rainfall in Beijing[J]. International Journal of Climatology,2019-01-01,39(3)
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