干旱区生态环境知识资源中心(Arid): Development of a biparametric varying Non-Stationary Standardized Precipitation Evapotranspiration Index and its application in the West Liaoning semi-arid zone

Arid

DOI	10.1002/joc.8582
	Development of a biparametric varying Non-Stationary Standardized Precipitation Evapotranspiration Index and its application in the West Liaoning semi-arid zone
	Gong, Xinglong; Xu, Yuan; Liu, Mingyang; Xu, Aiqi
通讯作者	Xu, Y
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2024
英文摘要	The reliability of conventional drought indices is increasingly called into question as the stationarity of hydrologic series undergoes significant alterations and becomes irreversibly impacted by environmental changes. In the extant literature concerning Non-Stationary Standardized Precipitation Evapotranspiration Indices (NSPEIs), researchers typically construct linear models incorporating location parameters and covariates; however, the simultaneous consideration of both location and scale parameters has been conspicuously infrequent. In this study, we developed a NSPEI using the generalized additive models in location, scale and shape. This index innovatively incorporates location and scale parameters that vary in response to changes in meteorological factors, thereby offering a more reliable and robust means to quantify drought characteristics under changing environmental conditions. The index was employed across representative sub-watersheds within the western region of Liaoning Province and subjected to a comparative analysis alongside the conventional Standardized Precipitation Evapotranspiration Index (SPEI) to ascertain its reliability. The findings indicate that within the study area, both the precipitation and evapotranspiration series exhibit non-stationary behaviour. Specifically, the precipitation data reveals an overall declining trend, while the evapotranspiration data demonstrates an ascending trend. Furthermore, NSPEI demonstrates superior performance over SPEI in the reconstruction of historical drought events within the western region of Liaoning Province, thereby providing a more accurate representation of the actual drought conditions experienced. The NSPEI estimated a larger drought peak, whereas the SPEI identified longer durations and greater severity of droughts. These findings provide valuable information for evaluating drought characteristics and managing water resources under changing environmental conditions. Parameters (location and scale) described as a non-linear function of climatic factor combinations. Non-Stationary Standardized Precipitation Evapotranspiration Index (NSPEI) demonstrates superior performance over Standardized Precipitation Evapotranspiration Index (SPEI) in the reconstruction of historical drought events within the study area. NSPEI appears to be more effective in reproducing drought intensity and demonstrates greater sensitivity in detecting the occurrence of drought events. image
英文关键词	GAMLSS meteorological drought non-stationary NSPEI west of Liaoning
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001281971200001
WOS关键词	DROUGHT ; STATIONARITY ; DEAD
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404219
推荐引用方式 GB/T 7714	Gong, Xinglong,Xu, Yuan,Liu, Mingyang,et al. Development of a biparametric varying Non-Stationary Standardized Precipitation Evapotranspiration Index and its application in the West Liaoning semi-arid zone[J],2024.
APA	Gong, Xinglong,Xu, Yuan,Liu, Mingyang,&Xu, Aiqi.(2024).Development of a biparametric varying Non-Stationary Standardized Precipitation Evapotranspiration Index and its application in the West Liaoning semi-arid zone.INTERNATIONAL JOURNAL OF CLIMATOLOGY.
MLA	Gong, Xinglong,et al."Development of a biparametric varying Non-Stationary Standardized Precipitation Evapotranspiration Index and its application in the West Liaoning semi-arid zone".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2024).