Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration
Terrestrial evapotranspiration (ET) is thermodynamically expected to increase with increasing atmospheric temperature; however, the actual constraints on the intensification of ET remain uncertain due to a lack of direct observations. Based on the FLUXNET2015 Dataset, we found that relative humidity...
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Language: | English |
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IOP Publishing
2021
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Online Access: | http://hdl.handle.net/10138/324390 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/324390 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
terrestrial evapotranspiration relative humidity global warming stomata regulation SOIL-MOISTURE COMPLEMENTARY RELATIONSHIP RECENT DECLINE LAND EVAPORATION WATER TREND CO2 PHOTOSYNTHESIS VARIABILITY 1172 Environmental sciences |
spellingShingle |
terrestrial evapotranspiration relative humidity global warming stomata regulation SOIL-MOISTURE COMPLEMENTARY RELATIONSHIP RECENT DECLINE LAND EVAPORATION WATER TREND CO2 PHOTOSYNTHESIS VARIABILITY 1172 Environmental sciences Xiao, Mingzhong Yu, Zhongbo Kong, Dongdong Gu, Xihui Mammarella, Ivan Montagnani, Leonardo Arain, M. Altaf Merbold, Lutz Magliulo, Vincenzo Lohila, Annalea Buchmann, Nina Wolf, Sebastian Gharun, Mana Hörtnagl, Lukas Beringer, Jason Gioli, Beniamino Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
topic_facet |
terrestrial evapotranspiration relative humidity global warming stomata regulation SOIL-MOISTURE COMPLEMENTARY RELATIONSHIP RECENT DECLINE LAND EVAPORATION WATER TREND CO2 PHOTOSYNTHESIS VARIABILITY 1172 Environmental sciences |
description |
Terrestrial evapotranspiration (ET) is thermodynamically expected to increase with increasing atmospheric temperature; however, the actual constraints on the intensification of ET remain uncertain due to a lack of direct observations. Based on the FLUXNET2015 Dataset, we found that relative humidity (RH) is a more important driver of ET than temperature. While actual ET decrease at reduced RH, potential ET increases, consistently with the complementary relationship (CR) framework stating that the fraction of energy not used for actual ET is dissipated as increased sensible heat flux that in turn increases potential ET. In this study, we proposed an improved CR formulation requiring no parameter calibration and assessed its reliability in estimating ET both at site-level with the FLUXNET2015 Dataset and at basin-level. Using the ERA-Interim meteorological dataset for 1979-2017 to calculate ET, we found that the global terrestrial ET showed an increasing trend until 1998, while the trend started to decline afterwards. Such decline was largely associated with a reduced RH, inducing water stress conditions that triggered stomatal closure to conserve water. For the first time, this study quantified the global-scale implications of changes in RH on terrestrial ET, indicating that the temperature-driven acceleration of the terrestrial water cycle will be likely constrained by terrestrial vegetation feedbacks. Peer reviewed |
author2 |
Staff Services INAR Physics Micrometeorology and biogeochemical cycles |
format |
Article in Journal/Newspaper |
author |
Xiao, Mingzhong Yu, Zhongbo Kong, Dongdong Gu, Xihui Mammarella, Ivan Montagnani, Leonardo Arain, M. Altaf Merbold, Lutz Magliulo, Vincenzo Lohila, Annalea Buchmann, Nina Wolf, Sebastian Gharun, Mana Hörtnagl, Lukas Beringer, Jason Gioli, Beniamino |
author_facet |
Xiao, Mingzhong Yu, Zhongbo Kong, Dongdong Gu, Xihui Mammarella, Ivan Montagnani, Leonardo Arain, M. Altaf Merbold, Lutz Magliulo, Vincenzo Lohila, Annalea Buchmann, Nina Wolf, Sebastian Gharun, Mana Hörtnagl, Lukas Beringer, Jason Gioli, Beniamino |
author_sort |
Xiao, Mingzhong |
title |
Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
title_short |
Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
title_full |
Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
title_fullStr |
Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
title_full_unstemmed |
Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
title_sort |
stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration |
publisher |
IOP Publishing |
publishDate |
2021 |
url |
http://hdl.handle.net/10138/324390 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
10.1088/1748-9326/ab9967 This work used FLUXNET data acquired and shared by the global FLUXNET community, including AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, CarboEuropeIP, CarboItaly, CarboMont, ChinaFlux, Fluxnet-Canada, GreenGrass, ICOS, KoFlux, LBA, NECC, OzFlux-TERN, Swiss FluxNet, TCOSSiberia, and USCCC. The ERA-Interim reanalysis data obtained from ECMWF and processed by LSCE. The FLUXNET eddy covariance data processing and harmonization was carried out by the European Fluxes Database Cluster, AmeriFlux Management Project, and Fluxdata project of FLUXNET, with the support of CDIAC and ICOS Ecosystem Thematic Center, and the OzFlux, ChinaFlux and AsiaFlux offices. In detail, US-Prr is supported by JAMSTEC and IARC/UAF collaboration study and Japanese Arctic Research Program (ArCS); Department of Energy Office of Science, Ameriflux Network Management Project Support for UW ChEAS Cluster (US-Los, US-PFa, US-WCr, USSyv, 2012-present). CPC Global Unified Precipitation data was provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at https://www.esrl.noaa.gov/psd/data/gridded/.Monthly GRDC Reference Dataset was provided by the Global Runoff Data Centre, 56068 Koblenz, Germany. The multi-satellite surface soil moisture data was provided by ESA CCI SM project. The authors acknowledge contributions from individual researcher who made sincere efforts to gather these data sets and made them available for synthesis work. The work was supported by National Key R&D Program of China (2016YFC0402706, 2016YFC0402710); the National Natural Science Foundation of China (51909057, 51539003, 41901041); China Postdoctoral Science Foundation (2017M610292). MG acknowledges funding by Swiss National Science Foundation project ICOS-CH Phase 2 20FI20_173691. The authors also acknowledge Professor Changliang Shao, Dr. Mika Aurela for their interest and helpful correspondence. Finally, we thank two anonymous reviewers and the Editorial Board Member for their constructive comments and review of the manuscript. Xiao , M , Yu , Z , Kong , D , Gu , X , Mammarella , I , Montagnani , L , Arain , M A , Merbold , L , Magliulo , V , Lohila , A , Buchmann , N , Wolf , S , Gharun , M , Hörtnagl , L , Beringer , J & Gioli , B 2020 , ' Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration ' , Environmental Research Letters , vol. 15 , no. 9 , 094066 . https://doi.org/10.1088/1748-9326/ab9967 ORCID: /0000-0002-8516-3356/work/86937475 dd4e1a00-a600-4559-921a-90af665e7648 http://hdl.handle.net/10138/324390 000565753300001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787421590339715072 |
spelling |
ftunivhelsihelda:oai:helda.helsinki.fi:10138/324390 2024-01-07T09:40:48+01:00 Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration Xiao, Mingzhong Yu, Zhongbo Kong, Dongdong Gu, Xihui Mammarella, Ivan Montagnani, Leonardo Arain, M. Altaf Merbold, Lutz Magliulo, Vincenzo Lohila, Annalea Buchmann, Nina Wolf, Sebastian Gharun, Mana Hörtnagl, Lukas Beringer, Jason Gioli, Beniamino Staff Services INAR Physics Micrometeorology and biogeochemical cycles 2021-01-11T13:11:01Z 11 application/pdf http://hdl.handle.net/10138/324390 eng eng IOP Publishing 10.1088/1748-9326/ab9967 This work used FLUXNET data acquired and shared by the global FLUXNET community, including AmeriFlux, AfriFlux, AsiaFlux, CarboAfrica, CarboEuropeIP, CarboItaly, CarboMont, ChinaFlux, Fluxnet-Canada, GreenGrass, ICOS, KoFlux, LBA, NECC, OzFlux-TERN, Swiss FluxNet, TCOSSiberia, and USCCC. The ERA-Interim reanalysis data obtained from ECMWF and processed by LSCE. The FLUXNET eddy covariance data processing and harmonization was carried out by the European Fluxes Database Cluster, AmeriFlux Management Project, and Fluxdata project of FLUXNET, with the support of CDIAC and ICOS Ecosystem Thematic Center, and the OzFlux, ChinaFlux and AsiaFlux offices. In detail, US-Prr is supported by JAMSTEC and IARC/UAF collaboration study and Japanese Arctic Research Program (ArCS); Department of Energy Office of Science, Ameriflux Network Management Project Support for UW ChEAS Cluster (US-Los, US-PFa, US-WCr, USSyv, 2012-present). CPC Global Unified Precipitation data was provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at https://www.esrl.noaa.gov/psd/data/gridded/.Monthly GRDC Reference Dataset was provided by the Global Runoff Data Centre, 56068 Koblenz, Germany. The multi-satellite surface soil moisture data was provided by ESA CCI SM project. The authors acknowledge contributions from individual researcher who made sincere efforts to gather these data sets and made them available for synthesis work. The work was supported by National Key R&D Program of China (2016YFC0402706, 2016YFC0402710); the National Natural Science Foundation of China (51909057, 51539003, 41901041); China Postdoctoral Science Foundation (2017M610292). MG acknowledges funding by Swiss National Science Foundation project ICOS-CH Phase 2 20FI20_173691. The authors also acknowledge Professor Changliang Shao, Dr. Mika Aurela for their interest and helpful correspondence. Finally, we thank two anonymous reviewers and the Editorial Board Member for their constructive comments and review of the manuscript. Xiao , M , Yu , Z , Kong , D , Gu , X , Mammarella , I , Montagnani , L , Arain , M A , Merbold , L , Magliulo , V , Lohila , A , Buchmann , N , Wolf , S , Gharun , M , Hörtnagl , L , Beringer , J & Gioli , B 2020 , ' Stomatal response to decreased relative humidity constrains the acceleration of terrestrial evapotranspiration ' , Environmental Research Letters , vol. 15 , no. 9 , 094066 . https://doi.org/10.1088/1748-9326/ab9967 ORCID: /0000-0002-8516-3356/work/86937475 dd4e1a00-a600-4559-921a-90af665e7648 http://hdl.handle.net/10138/324390 000565753300001 cc_by openAccess info:eu-repo/semantics/openAccess terrestrial evapotranspiration relative humidity global warming stomata regulation SOIL-MOISTURE COMPLEMENTARY RELATIONSHIP RECENT DECLINE LAND EVAPORATION WATER TREND CO2 PHOTOSYNTHESIS VARIABILITY 1172 Environmental sciences Article publishedVersion 2021 ftunivhelsihelda 2023-12-14T00:12:26Z Terrestrial evapotranspiration (ET) is thermodynamically expected to increase with increasing atmospheric temperature; however, the actual constraints on the intensification of ET remain uncertain due to a lack of direct observations. Based on the FLUXNET2015 Dataset, we found that relative humidity (RH) is a more important driver of ET than temperature. While actual ET decrease at reduced RH, potential ET increases, consistently with the complementary relationship (CR) framework stating that the fraction of energy not used for actual ET is dissipated as increased sensible heat flux that in turn increases potential ET. In this study, we proposed an improved CR formulation requiring no parameter calibration and assessed its reliability in estimating ET both at site-level with the FLUXNET2015 Dataset and at basin-level. Using the ERA-Interim meteorological dataset for 1979-2017 to calculate ET, we found that the global terrestrial ET showed an increasing trend until 1998, while the trend started to decline afterwards. Such decline was largely associated with a reduced RH, inducing water stress conditions that triggered stomatal closure to conserve water. For the first time, this study quantified the global-scale implications of changes in RH on terrestrial ET, indicating that the temperature-driven acceleration of the terrestrial water cycle will be likely constrained by terrestrial vegetation feedbacks. Peer reviewed Article in Journal/Newspaper Arctic HELDA – University of Helsinki Open Repository |