气候变化领域集成服务门户(CCPortal): Spatial and Temporal Variations of Potential Evapotranspiration in the Loess Plateau of China During 1960-2017

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DOI	10.3390/su12010354
	Spatial and Temporal Variations of Potential Evapotranspiration in the Loess Plateau of China During 1960-2017
	Sun, Congjian; Zheng, Zhenjing; Chen, Wei; Wang, Yuyang
通讯作者	Sun, CJ ; Zheng, ZJ (通讯作者)
发表日期	2020
EISSN	2071-1050
卷号	12 期号:1
英文摘要	Potential evapotranspiration (ET0) is an integral component of the hydrological cycle and the global energy balance, and its long-term variation is of much concern in climate change studies. The Loess Plateau is an important area of agricultural civilization and water resources research. This study analyzed the spatial and temporal evolution processes and influential parameters of ET0 at 70 stations in different topographical areas of the Chinese Loess Plateau (CLP). Using the Mann-Kendall trend, Cross wavelet transform, and the ArcGIS platform, the ET0 of each station was quantified using the Penman-Monteith equation, and the effects of climatic factors on ET0 were assessed by analyzing the correlation coefficients and contribution rates of the climatic factors. The results showed that: (1) the overall trend of the ET0 in different terrains of the Loess Plateau is consistent, however, the ET0 values differ; the hill region (HR) has the highest ET0, followed by the valley region (VR), and the mountain region (MR) has the lowest, and ET0 changes differ between seasons. (2) Spatial distribution characteristics of multiyear mean ET0 in the study are as follows: the ET0 values in mountain and hilly areas are decreasing from west to east, and the higher mean annual ET0 value in the VR is mainly concentrated in the eastern CLP. (3) In the past 58 years, the annual mean and the seasonal ET0 of the region showed increasing trends, however, differences in different terrains were obvious. (4) ET0 has significant correlations with El Nino-Southern Oscillation (ENSO), Pacific-North American teleconnection (PNA), and Atlantic Multidecadal Oscillation (AMO). The resonance period of ET0 and ENSO was 3-6 a, mainly in 1976-1985. The mean coherence phase angle was close to 360 degrees, indicating that ET0 lags behind PNA by approximately 2-6 a; ET0 has a very strong positive correlation with AMO. (5) Relative humidity (RH) is the main influencing factor of ET0 change in the Loess Plateau. Temperature (T) variation has the highest contribution rate (42%) to the regional ET0 variation in the entire CLP. We should pay more attention to the variation of evaporation under future climate change, especially temperature change.
关键词	SOUTHWESTERN CHINA CLIMATE-CHANGE TEMPERATURE INTENSIFICATION IMPACTS REGION TREND
英文关键词	potential evapotranspiration; Penman-Monteith model; temporal-spatial distribution; controlling parameters; Loess Plateau
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS记录号	WOS:000521955600354
来源期刊	SUSTAINABILITY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259746
推荐引用方式 GB/T 7714	Sun, Congjian,Zheng, Zhenjing,Chen, Wei,et al. Spatial and Temporal Variations of Potential Evapotranspiration in the Loess Plateau of China During 1960-2017[J]. 中国科学院青藏高原研究所,2020,12(1).
APA	Sun, Congjian,Zheng, Zhenjing,Chen, Wei,&Wang, Yuyang.(2020).Spatial and Temporal Variations of Potential Evapotranspiration in the Loess Plateau of China During 1960-2017.SUSTAINABILITY,12(1).
MLA	Sun, Congjian,et al."Spatial and Temporal Variations of Potential Evapotranspiration in the Loess Plateau of China During 1960-2017".SUSTAINABILITY 12.1(2020).