气候变化领域集成服务门户(CCPortal): Precipitation anomalies over Qinghai-Tibet Plateau during Bay of Bengal Storm double-peak periods

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DOI	10.1007/s00704-023-04806-5
	Precipitation anomalies over Qinghai-Tibet Plateau during Bay of Bengal Storm double-peak periods
	Wang, Jinsong; Li, Ying; Wu, Jing
发表日期	2023
ISSN	0177-798X
EISSN	1434-4483
英文摘要	The Bay of Bengal Storm (BBS) frequently occurs during the double-peak periods in (1) May (pre-peak period) and (2) October to November (post-peak period). Exploring precipitation variation and its anomalies during these periods is crucial for understanding climate change in the Qinghai-Tibet Plateau (QTP). Precipitation products of MSWEP v2 (Multi-Source Weighted Ensemble Precipitation Version 2) along with precipitation observations from meteorological stations and BBS data from the Guam Joint Typhoon Warning Center from 1979 to 2020 were employed for the analysis. The objective of the present study was to investigate the anomalous characteristics and multi-temporal variability of regional precipitation over the QTP and its relationship with the BBS using the empirical orthogonal function (EOF), rotated empirical orthogonal function (REOF), and percentage calculation method. There was a consistent spatial distribution of precipitation on the QTP during double-peak periods based on the first mode of EOF. However, the second mode of EOF identified a northeast-southwest reverse in precipitation distribution. The QTP was categorized into five precipitation anomalous subregions during double-peak periods using REOF. Precipitation showed significant increases (12.6 mm/10a in May and 5.1 mm/10a in October to November) in specific regions. Precipitation anomalies on the QTP during double-peak periods exhibited positive anomalies at various timescales (monthly, ten-day, and pentad), with stronger BBS influence in the pre-peak period. From 1979 to 2020, all monthly precipitation anomalies on the QTP during double-peak periods were accompanied by BBS, with an 8% probability. The rates of precipitation anomalies under the influence of BBS were about 18% and 28% in the ten-day and pentad timescales, respectively, with BBS contributing the most to pentad precipitation anomalies. Daily precipitation anomalies during the pre-peak and post-peak periods were influenced by BBS to varying extents (30%, 20%, and 25% in May, October, and November, respectively). Extreme daily precipitation days affected by BBS represented 19%, 16%, and 21% of the statistical period extreme precipitation days in May, October, and November, respectively, with higher rates in the post-peak period.
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001130336300002
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283177
作者单位	China Meteorological Administration; China Meteorological Administration; Chinese Academy of Meteorological Sciences (CAMS)
推荐引用方式 GB/T 7714	Wang, Jinsong,Li, Ying,Wu, Jing. Precipitation anomalies over Qinghai-Tibet Plateau during Bay of Bengal Storm double-peak periods[J],2023.
APA	Wang, Jinsong,Li, Ying,&Wu, Jing.(2023).Precipitation anomalies over Qinghai-Tibet Plateau during Bay of Bengal Storm double-peak periods.THEORETICAL AND APPLIED CLIMATOLOGY.
MLA	Wang, Jinsong,et al."Precipitation anomalies over Qinghai-Tibet Plateau during Bay of Bengal Storm double-peak periods".THEORETICAL AND APPLIED CLIMATOLOGY (2023).