Global critical soil moisture thresholds of plant water stress
Centre National de la Recherche Scientifique · Université de Versailles Saint-Quentin-en-Yvelines · +24 more institutions
Abstract
Abstract During extensive periods without rain, known as dry-downs, decreasing soil moisture (SM) induces plant water stress at the point when it limits evapotranspiration, defining a critical SM threshold (θ crit ). Better quantification of θ crit is needed for improving future projections of climate and water resources, food production, and ecosystem vulnerability. Here, we combine systematic satellite observations of the diurnal amplitude of land surface temperature (dLST) and SM during dry-downs, corroborated by in-situ data from flux towers, to generate the observation-based global map of θ crit . We find an average global θ crit of 0.19 m 3 /m 3 , varying from 0.12 m 3 /m 3 in arid ecosystems to 0.26 m 3…
Citation impact
- FWCI
- 27.99
- Percentile
- 100%
- References
- 99
Authors
22- ZFZheng FuCorresponding
Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Chinese Academy of Sciences, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Laboratoire des Sciences du Climat et de l'Environnement, CEA Paris-Saclay, Institute of Geographic Sciences and Natural Resources Research
- PCPhilippe Ciais
Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Laboratoire des Sciences du Climat et de l'Environnement, CEA Paris-Saclay
- JWJean‐Pierre Wigneron
Université de Bordeaux, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, École Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine
- PGPierre Gentine
Columbia University
- AFAndrew F. Feldman
Goddard Space Flight Center, Earth System Science Interdisciplinary Center, University of Maryland, College Park
Topics & keywords
- Environmental science
- Evapotranspiration
- Ecosystem
- Arid
- Soil texture
- Tipping point (physics)
- Aridity index
- Precipitation
Funding
- NANational Aeronautics and Space AdministrationAward: 80NSSC23K0109
- OROak Ridge Associated Universities
- UOUniversity of Pennsylvania
- PSPennsylvania State University
- ECEuropean CommissionAward: 787203
- ANAgence Nationale de la Recherche
- NNNational Natural Science Foundation of ChinaAward: 31988102
- CNCentre National d’Etudes Spatiales
- NSNuclear Safety and Security Commission
- INInstitut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
- GSGoddard Space Flight Center