Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China

Reference evapotranspiration (ET0) indicates atmospheric evaporating capability over a hypothetical reference surface. ET0 is an important hydrological and meteorological variable to reflect climate change. This is particularly true for the Upper Yangtze River Basin (UYRB), which is vulnerable and s...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Manlin Wang, Yu Zhang, Yan Lu, Xulong Gong, Li Gao
Formato: article
Lenguaje:EN
Publicado: IWA Publishing 2021
Materias:
Acceso en línea:https://doaj.org/article/f44220eec0bd4224afada958c591faef
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:f44220eec0bd4224afada958c591faef
record_format dspace
spelling oai:doaj.org-article:f44220eec0bd4224afada958c591faef2021-11-05T19:07:51ZDetection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China2040-22442408-935410.2166/wcc.2021.011https://doaj.org/article/f44220eec0bd4224afada958c591faef2021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2624https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Reference evapotranspiration (ET0) indicates atmospheric evaporating capability over a hypothetical reference surface. ET0 is an important hydrological and meteorological variable to reflect climate change. This is particularly true for the Upper Yangtze River Basin (UYRB), which is vulnerable and sensitive to changing environment. This study aims to provide a newer and longer description of ET0 change and the causes at basin and subbasin scales in the UYRB. Based on the observed data from 1951 to 2020, ET0 in the entire UYRB and subbasins is estimated using the Penman–Montieth method with local calibration. The spatial–temporal characteristics in ET0 change are identified from time-series analysis. Our results show that ET0 increases significantly by 3.3 mm/year in the entire UYRB. Stations with significant increases in annual ET0 are concentrated in the central part of the UYRB, where the mean annual ET0 is low. We further propose an improved method to assess the causes of ET0 change. Our results suggest that the relative humidity decrease has the most dominant effect, causing 4.69 mm/year of ET0 increase. Temperature increase tends to cause 1.26 mm/year of ET0 increase. Sunshine duration decrease and wind speed decrease contribute to 1.96 and 0.48 mm/year of ET0 decrease. HIGHLIGHTS ET0 increases significantly in the UYRB.; The significant increases of annual ET0 gather in the central region of the UYRB.; The relative humidity decrease has the most dominant effect on ET0 increase in the UYRB.; The ET0 change and contributions of climatic variables vary in subbasins.;Manlin WangYu ZhangYan LuXulong GongLi GaoIWA Publishingarticleattribution analysisclimate changereference evapotranspiration changesensitivity analysisthe upper yangtze river basinEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2624-2638 (2021)
institution DOAJ
collection DOAJ
language EN
topic attribution analysis
climate change
reference evapotranspiration change
sensitivity analysis
the upper yangtze river basin
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
spellingShingle attribution analysis
climate change
reference evapotranspiration change
sensitivity analysis
the upper yangtze river basin
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Manlin Wang
Yu Zhang
Yan Lu
Xulong Gong
Li Gao
Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
description Reference evapotranspiration (ET0) indicates atmospheric evaporating capability over a hypothetical reference surface. ET0 is an important hydrological and meteorological variable to reflect climate change. This is particularly true for the Upper Yangtze River Basin (UYRB), which is vulnerable and sensitive to changing environment. This study aims to provide a newer and longer description of ET0 change and the causes at basin and subbasin scales in the UYRB. Based on the observed data from 1951 to 2020, ET0 in the entire UYRB and subbasins is estimated using the Penman–Montieth method with local calibration. The spatial–temporal characteristics in ET0 change are identified from time-series analysis. Our results show that ET0 increases significantly by 3.3 mm/year in the entire UYRB. Stations with significant increases in annual ET0 are concentrated in the central part of the UYRB, where the mean annual ET0 is low. We further propose an improved method to assess the causes of ET0 change. Our results suggest that the relative humidity decrease has the most dominant effect, causing 4.69 mm/year of ET0 increase. Temperature increase tends to cause 1.26 mm/year of ET0 increase. Sunshine duration decrease and wind speed decrease contribute to 1.96 and 0.48 mm/year of ET0 decrease. HIGHLIGHTS ET0 increases significantly in the UYRB.; The significant increases of annual ET0 gather in the central region of the UYRB.; The relative humidity decrease has the most dominant effect on ET0 increase in the UYRB.; The ET0 change and contributions of climatic variables vary in subbasins.;
format article
author Manlin Wang
Yu Zhang
Yan Lu
Xulong Gong
Li Gao
author_facet Manlin Wang
Yu Zhang
Yan Lu
Xulong Gong
Li Gao
author_sort Manlin Wang
title Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
title_short Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
title_full Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
title_fullStr Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
title_full_unstemmed Detection and attribution of reference evapotranspiration change (1951–2020) in the Upper Yangtze River Basin of China
title_sort detection and attribution of reference evapotranspiration change (1951–2020) in the upper yangtze river basin of china
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/f44220eec0bd4224afada958c591faef
work_keys_str_mv AT manlinwang detectionandattributionofreferenceevapotranspirationchange19512020intheupperyangtzeriverbasinofchina
AT yuzhang detectionandattributionofreferenceevapotranspirationchange19512020intheupperyangtzeriverbasinofchina
AT yanlu detectionandattributionofreferenceevapotranspirationchange19512020intheupperyangtzeriverbasinofchina
AT xulonggong detectionandattributionofreferenceevapotranspirationchange19512020intheupperyangtzeriverbasinofchina
AT ligao detectionandattributionofreferenceevapotranspirationchange19512020intheupperyangtzeriverbasinofchina
_version_ 1718444076947210240