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Journal articles
Partitioning global land evapotranspiration using CMIP5 models constrained by observations
Xu Lian
1
Shilong Piao
1
Chris Huntingford
2
Yue Li
1
Zhenzhong Zeng
1
Xuhui Wang
3
Philippe Ciais
4, 5
Tim Mcvicar
6
Shushi Peng
1
Catherine Ottle
4, 7
Hui Yang
1
Yuting Yang
8
Yongqiang Zhang
6
Tao Wang
9
5
ICOS-ATC - ICOS-ATC
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
7
MERMAID - Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE
Shushi Peng 1
Author
Catherine Ottle 4, 7
Author IdHAL : catherine-ottle ORCID : https://orcid.org/0000-0003-1304-6414
Hui Yang 1
Author
Yuting Yang 8
Author
Yongqiang Zhang 6
Author
Tao Wang 9
Author
1
Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences (Peking University, Beijing 100871, China - China)
- Peking University [Beijing] (No.5 Yiheyuan Road Haidian District, Beijing, P.R.China 100871 - China)
2
CEH - Centre for Ecology and Hydrology [Wallingford] (Maclean Building Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB - United Kingdom)
- NERC - Natural Environment Research Council (United Kingdom)
4
LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8212 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8212 (France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/LSCE (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8212 (55 avenue de Paris - 78035 Versailles cedex - France)
5
ICOS-ATC - ICOS-ATC (LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin. - France)
- LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE (Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8212 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8212 (France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/LSCE (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8212 (55 avenue de Paris - 78035 Versailles cedex - France)
6
CSIRO - Commonwealth Scientific and Industrial Research Organisation [Canberra] (GPO Box 1700, Canberra ACT 2600 - Australia)
7
MERMAID - Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin. - France)
- LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] : DRF/LSCE (Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8212 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8212 (France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/LSCE (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8212 (55 avenue de Paris - 78035 Versailles cedex - France)
Abstract : The ratio of plant transpiration to total terrestrial evapotranspiration (T/ET) captures the role of vegetation in surface–atmosphere interactions. However, its magnitude remains highly uncertain at the global scale. Here we apply an emergent constraint approach that integrates CMIP5 Earth system models (ESMs) with 33 field T/ET measurements to re-estimate the global T/ET value. Our observational constraint strongly increases the original ESM estimates (0.41 ± 0.11) and greatly alleviates intermodel discrepancy, which leads to a new global T/ET estimate of 0.62 ± 0.06. For all the ESMs, the leaf area index is identified as the primary driver of spatial variations of T/ET, but to correct its bias generates a larger T/ET underestimation than the original ESM output. We present evidence that the ESM underestimation of T/ET is, instead, attributable to inaccurate representation of canopy light use, interception loss and root water uptake processes in the ESMs. These processes should be prioritized to reduce model uncertainties in the global hydrological cycle.
Document type :
Journal articles
Domain :
Complete list of metadata
https://hal-cea.archives-ouvertes.fr/cea-01874286
Contributor : Bruno Savelli Connect in order to contact the contributor
Submitted on : Friday, September 14, 2018 - 11:22:41 AM
Last modification on : Thursday, October 21, 2021 - 3:43:38 AM
Contributor : Bruno Savelli Connect in order to contact the contributor
Submitted on : Friday, September 14, 2018 - 11:22:41 AM
Last modification on : Thursday, October 21, 2021 - 3:43:38 AM
Identifiers
- HAL Id : cea-01874286, version 1
- DOI : 10.1038/s41558-018-0207-9
Collections
CEA | CNRS | UVSQ | CEA-UPSAY | LSCE | INSU | LSCE-CEA | GS-ENGINEERING | GS-BIOSPHERA | GS-GEOSCIENCES
Citation
Xu Lian, Shilong Piao, Chris Huntingford, Yue Li, Zhenzhong Zeng, et al.. Partitioning global land evapotranspiration using CMIP5 models constrained by observations. Nature Climate Change, Nature Publishing Group, 2018, 8, pp.640 - 646. ⟨10.1038/s41558-018-0207-9⟩. ⟨cea-01874286⟩
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