Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas

The climate system has both non-stationary and nonlinear characteristics. The non-stationary processes such as climate change and human activities have brought severe challenges to life, agriculture and ecology in arid areas. It is of great practical significance to study the spatiotemporal variatio...

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Autores principales:	Bing He, Jianxia Chang, Yimin Wang, Yan Wang, Shuai Zhou, Chen Chen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Non-stationary Drought Standardized precipitation evapotranspiration index BFAST Inland arid areas Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/820ee29d308945e0a8b7ca34195b13b3
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id	oai:doaj.org-article:820ee29d308945e0a8b7ca34195b13b3
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spelling	oai:doaj.org-article:820ee29d308945e0a8b7ca34195b13b32021-12-01T04:50:21ZSpatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas1470-160X10.1016/j.ecolind.2021.107644https://doaj.org/article/820ee29d308945e0a8b7ca34195b13b32021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21003095https://doaj.org/toc/1470-160XThe climate system has both non-stationary and nonlinear characteristics. The non-stationary processes such as climate change and human activities have brought severe challenges to life, agriculture and ecology in arid areas. It is of great practical significance to study the spatiotemporal variation and non-stationary characteristics of drought in arid region for adopting the countermeasures to adapt to climate change. The traditional trend change and variation analysis method was used to study the drought change characteristics, which could not effectively identify the clustering phenomenon of drought and the spatial and temporal variation of drought in different time intervals. Therefore, the method of breaks for additive seasonal and trend (BFAST) was introduced to determine the non-stationary characteristics and spatial variation of drought. In this study, a typical inland arid area was taken as the study area, and the drought was quantified by standardized precipitation evapotranspiration index (SPEI). The results show that: (1) the study area was prone to light drought and moderate drought, and the duration and intensity of drought events increased significantly after 1996; (2) The spatial distribution of drought frequency and drought intensity in different seasons were significantly different; (3) The results of BFAST analysis showed that there were four discontinuities in SPEI12 time series, which indicated that the drought in the study area had obvious non-stationary characteristics. Through the analysis of the breakpoint and drought change characteristics in the study area, the occurrence time of the breakpoint in the northern region had a certain periodicity, and the climate was in a state of aridity. The results of this study have important guiding significance for further understanding the non-stationary characteristics of drought in inland arid areas, and will promote the management of water resources and the protection of ecological environment.Bing HeJianxia ChangYimin WangYan WangShuai ZhouChen ChenElsevierarticleNon-stationaryDroughtStandardized precipitation evapotranspiration indexBFASTInland arid areasEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107644- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Non-stationary Drought Standardized precipitation evapotranspiration index BFAST Inland arid areas Ecology QH540-549.5
spellingShingle	Non-stationary Drought Standardized precipitation evapotranspiration index BFAST Inland arid areas Ecology QH540-549.5 Bing He Jianxia Chang Yimin Wang Yan Wang Shuai Zhou Chen Chen Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
description	The climate system has both non-stationary and nonlinear characteristics. The non-stationary processes such as climate change and human activities have brought severe challenges to life, agriculture and ecology in arid areas. It is of great practical significance to study the spatiotemporal variation and non-stationary characteristics of drought in arid region for adopting the countermeasures to adapt to climate change. The traditional trend change and variation analysis method was used to study the drought change characteristics, which could not effectively identify the clustering phenomenon of drought and the spatial and temporal variation of drought in different time intervals. Therefore, the method of breaks for additive seasonal and trend (BFAST) was introduced to determine the non-stationary characteristics and spatial variation of drought. In this study, a typical inland arid area was taken as the study area, and the drought was quantified by standardized precipitation evapotranspiration index (SPEI). The results show that: (1) the study area was prone to light drought and moderate drought, and the duration and intensity of drought events increased significantly after 1996; (2) The spatial distribution of drought frequency and drought intensity in different seasons were significantly different; (3) The results of BFAST analysis showed that there were four discontinuities in SPEI12 time series, which indicated that the drought in the study area had obvious non-stationary characteristics. Through the analysis of the breakpoint and drought change characteristics in the study area, the occurrence time of the breakpoint in the northern region had a certain periodicity, and the climate was in a state of aridity. The results of this study have important guiding significance for further understanding the non-stationary characteristics of drought in inland arid areas, and will promote the management of water resources and the protection of ecological environment.
format	article
author	Bing He Jianxia Chang Yimin Wang Yan Wang Shuai Zhou Chen Chen
author_facet	Bing He Jianxia Chang Yimin Wang Yan Wang Shuai Zhou Chen Chen
author_sort	Bing He
title	Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
title_short	Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
title_full	Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
title_fullStr	Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
title_full_unstemmed	Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
title_sort	spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/820ee29d308945e0a8b7ca34195b13b3
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Spatio-temporal evolution and non-stationary characteristics of meteorological drought in inland arid areas

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