气候变化领域集成服务门户(CCPortal): Recent variations in the seasonality difference between precipitation and potential evapotranspiration in China

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DOI	10.1002/joc.7435
	Recent variations in the seasonality difference between precipitation and potential evapotranspiration in China
	Ning, Tingting; Feng, Qi; Qin, Yanyan
发表日期	2021
ISSN	0899-8418
EISSN	1097-0088
英文摘要	The seasonality difference between precipitation (P) and potential evapotranspiration (E-0) has a significant imprint on ecohydrological processes, but little attention has been given to this difference in China. A climate seasonality and asynchrony index (SAI), considering the amplitude and phase difference (PD) between P and E-0, was thus applied to investigate the variation in seasonality difference between P and E-0 across China from 1960 to 2017. The main results showed that the mean amplitudes of seasonal P (delta(P)) were larger than that of E-0 (delta(E0)). Except for in east and central south China, the peak values of E-0 had a time lag of 23 days behind those of P. The annual SAI in China showed a significantly downward trend (p < 0.05), suggesting a reduction in the difference in seasonal P and E-0 in China. The attribution results showed that the variation in SAI was mainly controlled by delta(P) changes across China with a relative contribution of 60.5%, followed by delta(E0) (35.9%) and PD (3.6%). Wavelet analysis showed that the annual SAI had a significant relationship with ocean-atmosphere circulation patterns at a scale of 1-6 years (p < 0.05). As an attempt to investigate the difference in seasonal P and E-0 in China, the findings of this study can provide a reference for climate seasonality variations and support for the quantification of its effects on the ecohydrological environment.
英文关键词	attribution analysis; climate seasonality; potential evapotranspiration; precipitation
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS关键词	CLIMATE-CHANGE ; CIRCULATION PATTERNS ; RAINFALL SEASONALITY ; VEGETATION DYNAMICS ; WATER-BALANCE ; LAND-COVER ; TEMPERATURE ; CATCHMENT ; EXTREMES ; IMPACTS
WOS记录号	WOS:000718530700001
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239423
作者单位	[Ning, Tingting; Feng, Qi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Ning, Tingting; Qin, Yanyan] Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou, Peoples R China; [Ning, Tingting; Feng, Qi] Qilian Mt Ecoenvironm Res Ctr Gansu Prov, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Ning, Tingting,Feng, Qi,Qin, Yanyan. Recent variations in the seasonality difference between precipitation and potential evapotranspiration in China[J]. 中国科学院西北生态环境资源研究院,2021.
APA	Ning, Tingting,Feng, Qi,&Qin, Yanyan.(2021).Recent variations in the seasonality difference between precipitation and potential evapotranspiration in China.INTERNATIONAL JOURNAL OF CLIMATOLOGY.
MLA	Ning, Tingting,et al."Recent variations in the seasonality difference between precipitation and potential evapotranspiration in China".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2021).