气候变化领域集成服务门户(CCPortal): Reasons behind seasonal and monthly precipitation variability in the Qinghai-Tibet Plateau and its surrounding areas during 1979∼2017

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DOI	10.1016/j.jhydrol.2023.129329
	Reasons behind seasonal and monthly precipitation variability in the Qinghai-Tibet Plateau and its surrounding areas during 1979∼2017
	Lu, Hou-Liang; Li, Fang-Fang; Gong, Tong-Liang; Gao, Yan-Hong; Li, Jian-Feng; Qiu, Jun
发表日期	2023
ISSN	0022-1694
EISSN	1879-2707
卷号	619
英文摘要	The Qinghai-Tibet Plateau (QTP) is a hotspot in the study of global climate change due to its profound impact on the atmospheric water cycle in Asia and even the world. Previous studies on the QTP mainly focused on the spatial distribution of precipitation and its changing trend. To investigate the temporal and spatial variations of precipitation variability on the QTP, this study applied the standardized variability index (SVI) based on entropy on its daily precipitation without any preset distribution. The results showed that for most monsoon months in the past 40 years, SVI has a significant downward trend in the southwest foot of the Himalayas and the border zone between barren and grassland areas, indicating that precipitation has become more uniform, which is beneficial for growth of grassland. However, the Hurst exponent shows that such trend will reverse in the future, which may cause natural disasters such as landslides and debris flows in the monsoon period considering the large amount of precipitation and the local topographic conditions in the southwest of the Himalayan foothills. The inducements of such precipitation variability were also studied, including Asian monsoon, westerly jets, sea -land thermal difference, and Sea Surface Temperature (SST). Compared with the monsoon index, the sea-land thermal difference has a stronger correlation with the precipitation variability. The SST anomaly closer to the east coast of the equatorial Pacific also has a great impact on the variability of precipitation over the plateau. This study contributes to understanding precipitation variability in the QTP at a sub-seasonal period.
关键词	Entropy Standardized variability index (SVI)Qinghai-Tibet Plateau Seasonal Monthly precipitation variability Influencing factors on precipitation variability
英文关键词	SUMMER PRECIPITATION; SPATIAL-DISTRIBUTION; RAINFALL VARIATIONS; HURST EXPONENT; WATER; MONSOON; CLIMATE; TRENDS; IDENTIFICATION; PERSISTENCE
WOS研究方向	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000952127100001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282657
作者单位	China Agricultural University; Tibet Agriculture & Animal Husbandry University; Qinghai University; Tsinghua University
推荐引用方式 GB/T 7714	Lu, Hou-Liang,Li, Fang-Fang,Gong, Tong-Liang,et al. Reasons behind seasonal and monthly precipitation variability in the Qinghai-Tibet Plateau and its surrounding areas during 1979∼2017[J],2023,619.
APA	Lu, Hou-Liang,Li, Fang-Fang,Gong, Tong-Liang,Gao, Yan-Hong,Li, Jian-Feng,&Qiu, Jun.(2023).Reasons behind seasonal and monthly precipitation variability in the Qinghai-Tibet Plateau and its surrounding areas during 1979∼2017.JOURNAL OF HYDROLOGY,619.
MLA	Lu, Hou-Liang,et al."Reasons behind seasonal and monthly precipitation variability in the Qinghai-Tibet Plateau and its surrounding areas during 1979∼2017".JOURNAL OF HYDROLOGY 619(2023).