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Assessment of the global coherence of different types of droughts in model simulations under a high anthropogenic emission scenario
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  • Luis Gimeno-Sotelo,
  • Ahmed M. El Kenawy,
  • Magí Franquesa,
  • Iván Noguera,
  • Beatriz Fernández-Duque,
  • Fernando Domínguez-Castro,
  • Dhais Peña-Angulo,
  • Fergus Reig-Gracia,
  • Rogert Sorí,
  • Luis Gimeno,
  • Raquel Nieto,
  • Sergio M Vicente-Serrano
Luis Gimeno-Sotelo
Centro de Investigación Mariña, Universidade de Vigo, Environmental Physics Laboratory (EPhysLab), Ourense, Spain

Corresponding Author:[email protected]

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Ahmed M. El Kenawy
Instituto Pirenaico de Ecología, CSIC (Spanish Research Council)
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Magí Franquesa
Instituto Pirenaico de Ecología, CSIC (Spanish Research Council)
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Iván Noguera
Instituto Pirenaico de Ecología, CSIC (Spanish Research Council)
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Beatriz Fernández-Duque
Instituto Pirenaico de Ecología, CSIC (Spanish Research Council)
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Fernando Domínguez-Castro
2Aragonese Agency for Research and Development Researcher (ARAID). Department of Geography, University of Zaragoza.
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Dhais Peña-Angulo
Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC)
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Fergus Reig-Gracia
Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC)
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Rogert Sorí
Centro de Investigación Mariña, Universidade de Vigo, Environmental Physics Laboratory (EPhysLab), Campus As Lagoas s/n, Ourense, 32004, Spain / Instituto Dom Luiz, Faculdade de Ci&#x
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Luis Gimeno
Universidad de Vigo
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Raquel Nieto
EPhysLab (Environmental Physics Laboratory), Universidad de Vigo
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Sergio M Vicente-Serrano
Instituto Pirenaico de Ecología, CSIC (Spanish Research Council)
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Abstract

This study provides a global analysis of drought metrics obtained from several climatic, hydrologic and ecological variables in a climate change framework using CMIP6 model data. A comprehensive analysis of the evolution of drought severity on a global scale is carried out for the historical experiment (1850-2014) and for future simulations under a high emissions scenario (SSP5-8.5). This study focuses on assessing trends in the magnitude and duration of drought events according to different standardised indices over the world land-surface area. The spatial and temporal agreement between the different drought indices on a global scale was also evaluated. Overall, there is a fairly large consensus among models and drought metrics in pointing to drought increase in southern North America, Central America, the Amazon region, the Mediterranean, southern Africa and southern Australia. Our results show important spatial differences in drought projections, which are highly dependent on the drought metric employed. While a strong relationship between climatic indices was evident, climatic and ecological drought metrics showed less dependency over both space and time. Importantly, our study demonstrates uncertainties in future projections of drought trends and their interannual variability, stressing the importance of coherent hydrological and plant physiological patterns when analysing CMIP6 model simulations of droughts under a warming climate scenario.
02 Mar 2023Submitted to ESS Open Archive
06 Mar 2023Published in ESS Open Archive