干旱区生态环境知识资源中心(Arid): Spatial and Temporal Variations of Extreme Precipitation in Central Asia during 1982-2020

Arid

DOI	10.3390/atmos13010060
	Spatial and Temporal Variations of Extreme Precipitation in Central Asia during 1982-2020
	Tian, Yalin; Yan, Zhongwei; Li, Zhen
通讯作者	Li, Z
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2022
卷号	13 期号:1
英文摘要	As one of the largest arid and semi-arid regions in the world, central Asia (CA) is very sensitive to changes in regional climate. However, because of the poor continuity of daily observational precipitation records in CA, the spatial and temporal variations of extreme precipitation in recent decades remain unclear. Considering their good spatial and temporal continuity, gridded data, such as Climate Prediction Center (CPC) global precipitation, and reanalysis data, such as ERA-Interim (ERA), are helpful for exploring the spatial-temporal variations of extreme precipitation. This study evaluates how well CPC and ERA can represent observed precipitation extremes by comparing the differences in eight extreme precipitation indices and observation data at 84 meteorological stations. The results indicate that the CPC (except for 1979-1981) is more suitable for depicting changes in precipitation extremes. Based on the CPC data for the period 1982-2020, we found that seven indices of precipitation extremes, including consecutive wet days (CWD), max1-day precipitation amount (Rx1day), max5-day precipitation amount (Rx5day), number of heavy precipitation days (R10), very wet days (R95p), annual total precipitation in wet days (PRCPTOT), and simple precipitation intensity index (SDII) have increased by 0.2 d/10a, 0.9 mm/10a, 1.8 mm/10a, 0.3 d/10, 8.4 mm/10a, 14.3 mm/10a and 0.1 mm/d/10a, respectively, and the consecutive dry days (CDDs) have decreased by -3.10 d/10a. It is notable that CDDs decreased significantly in the north of Xinjiang (XJ) but increased in Kyrgyzstan (KG), Tajikistan (TI), and eastern Turkmenistan (TX). The other indices increased clearly in the west of XJ, north of Kazakhstan (KZ), and east of KG but decreased in the south of KG, TI, and parts of XJ. For most indices, the largest change occurred in spring, the main season of precipitation in CA. Therefore, the large-scale atmospheric circulation in April is analyzed to contrast between the most and least precipitation years for the region. A typical circulation pattern in April for those extremely wet years includes an abnormal low-pressure center at 850 hpa to the east of the Caspian Sea, which enhances the southerly winds from the Indian Ocean and hence the transportation of water vapor required for precipitation into CA. This abnormal circulation pattern occurred more frequently after 2001 than before, thus partly explaining the recent increasing trends of precipitation extremes in CA.
英文关键词	central Asia extreme precipitation climate change global warming
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000747449900001
WOS关键词	CLIMATE-CHANGE ; VARIABILITY ; REANALYSIS ; TRENDS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376765
推荐引用方式 GB/T 7714	Tian, Yalin,Yan, Zhongwei,Li, Zhen. Spatial and Temporal Variations of Extreme Precipitation in Central Asia during 1982-2020[J],2022,13(1).
APA	Tian, Yalin,Yan, Zhongwei,&Li, Zhen.(2022).Spatial and Temporal Variations of Extreme Precipitation in Central Asia during 1982-2020.ATMOSPHERE,13(1).
MLA	Tian, Yalin,et al."Spatial and Temporal Variations of Extreme Precipitation in Central Asia during 1982-2020".ATMOSPHERE 13.1(2022).