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...
Guardado en:
Autores principales: | , , , , |
---|---|
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 |