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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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HESS | Articles | Volume 24, issue 6
Hydrol. Earth Syst. Sci., 24, 2921–2930, 2020
https://doi.org/10.5194/hess-24-2921-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Hydrol. Earth Syst. Sci., 24, 2921–2930, 2020
https://doi.org/10.5194/hess-24-2921-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Jun 2020

Research article | 03 Jun 2020

Comparing Palmer Drought Severity Index drought assessments using the traditional offline approach with direct climate model outputs

Yuting Yang et al.

Data sets

CMIP5 project data Lawrence Livermore National Laboratory https://esgf-node.llnl.gov/search/cmip5/

Model code and software

zslthu/Calculate-PDSI-in-Matlab: Calculate-PDSI-in-Matlab (Version v1.0.0) zslthu https://doi.org/10.5281/zenodo.3871420

Publications Copernicus
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Short summary
Many previous studies using offline drought indices report that future warming will increase worldwide drought. However, this contradicts observations/projections of vegetation greening and increased runoff. We resolved this paradox by re-calculating the same drought indices using direct climate model outputs and find no increase in future drought as the climate warms. We also find that accounting for the impact of CO2 on plant transpiration avoids the previous overestimation of drought.
Many previous studies using offline drought indices report that future warming will increase...
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