干旱区生态环境知识资源中心(Arid): Effects of evapotranspiration and precipitation on dryness/wetness changes in China

Arid

DOI	10.1007/s00704-020-03336-8
	Effects of evapotranspiration and precipitation on dryness/wetness changes in China
	Wang, Suping; Zhang, Qiang; Yue, Ping; Wang, Jinsong
通讯作者	Zhang, Q
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
ISSN	0177-798X
EISSN	1434-4483
出版年	2020
卷号	142 期号:3-4 页码:1027-1038
英文摘要	Based on daily meteorological data from 693 weather stations for the period 1960-2017, the characteristics of dryness/wetness trends and their relation with reference crop evapotranspiration (ET0) and precipitation changes were assessed in China. The results showed that the semi-arid/semi-humid areas and humid areas of southwestern China experienced a drying trend, while the arid areas in northwestern China and the humid areas in southern China became wetter over the past 58 years. The dryness/wetness trends were highly sensitive to the variability of ET(0)in the arid and semi-arid areas and to precipitation in the humid and semi-humid areas. Regional differences in the contributions of ET(0)and precipitation to the dryness/wetness trends were significant. In the arid areas, the average contribution of ET(0)was 7% larger than that of precipitation, except in winter. A decreased ET(0)due to a reduction in wind speed and the increase in precipitation led to a wetting trend in these areas. In the semi-arid/semi-humid areas, ET(0)had a significantly larger effect on the dryness/wetness trends than precipitation. Contribution of ET(0)was about 21% larger than that of precipitation in spring and about 7% larger at the annual timescale. Due to an increase in ET(0)because of rising temperature and decrease in precipitation, the areas tended to be drier. In humid areas, precipitation was the dominant factor for the wetting trends. Contribution of precipitation was about 4 to 10% larger than that of ET(0)in summer and at the annual timescale and even completely dominated the trend of SPEI in winter. However, contribution of ET(0)in spring was slightly larger than that of precipitation in the humid areas, and a significant increase in temperature led to an increase in ET(0)and resulted in a tendency of dryness. Aside from the reduction in precipitation, increased evapotranspiration had comparable contributions to the trends of dryness, even greater than that of precipitation in the drying season and in drying areas. Our findings suggested that the effects of ET(0)against the background of global warming deserve more attention in future studies of dryness/wetness or drought.
英文关键词	ET0 Dryness wetness Sensitivity Contribution Regional differences
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000563593900003
WOS关键词	SENSITIVITY-ANALYSIS ; SOIL-MOISTURE ; POTENTIAL EVAPOTRANSPIRATION ; GLOBAL ASSESSMENT ; FLASH DROUGHTS ; CLIMATE ; UNCERTAINTY ; EVAPORATION ; FREQUENCY ; TREND
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325872
作者单位	[Wang, Suping; Zhang, Qiang] Lanzhou Univ, Coll Atmospher Sci, 222 Tianshui South Rd, Lanzhou 730000, Peoples R China; [Wang, Suping; Yue, Ping; Wang, Jinsong] China Meteorol Adm, Key Lab Arid Climat Change & Reducing Disaster Ga, Key Lab Arid Climat Change & Disaster Reduct, Inst Arid Meteorol, 2070 Donggang East Rd, Lanzhou 730020, Peoples R China; [Zhang, Qiang] Meteorol Bur Gansu Prov, 2070 Donggang East Rd, Lanzhou 730020, Peoples R China
推荐引用方式 GB/T 7714	Wang, Suping,Zhang, Qiang,Yue, Ping,et al. Effects of evapotranspiration and precipitation on dryness/wetness changes in China[J]. 兰州大学,2020,142(3-4):1027-1038.
APA	Wang, Suping,Zhang, Qiang,Yue, Ping,&Wang, Jinsong.(2020).Effects of evapotranspiration and precipitation on dryness/wetness changes in China.THEORETICAL AND APPLIED CLIMATOLOGY,142(3-4),1027-1038.
MLA	Wang, Suping,et al."Effects of evapotranspiration and precipitation on dryness/wetness changes in China".THEORETICAL AND APPLIED CLIMATOLOGY 142.3-4(2020):1027-1038.