Articles | Volume 29, issue 20
https://doi.org/10.5194/hess-29-5347-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-29-5347-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Oct 2025
Research article |
| 20 Oct 2025
| 20 Oct 2025
Hyperdroughts in central Chile: drivers, impacts, and projections
René Garreaud
CORRESPONDING AUTHOR
Center for Climate and Resilience Research (CR2), Santiago, Chile
Department of Geophysics, Universidad de Chile, Santiago, Chile
Juan Pablo Boisier
Center for Climate and Resilience Research (CR2), Santiago, Chile
Department of Geophysics, Universidad de Chile, Santiago, Chile
Camila Alvarez-Garreton
Center for Climate and Resilience Research (CR2), Santiago, Chile
Duncan A. Christie
Center for Climate and Resilience Research (CR2), Santiago, Chile
Laboratorio de Dendrocronología y Cambio Global. Instituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile
Tomás Carrasco-Escaff
Center for Climate and Resilience Research (CR2), Santiago, Chile
Iván Vergara
Center for Climate and Resilience Research (CR2), Santiago, Chile
IPATEC, CONICET-UNCo, Bariloche, Argentina
Roberto O. Chávez
Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Instituto de Ecología y Biodiversidad, Santiago, Chile
Paulina Aldunce
Center for Climate and Resilience Research (CR2), Santiago, Chile
Departamento de Ciencias Ambientales y Recursos Naturales Renovables, Universidad de Chile, Santiago, Chile
Pablo Camus
Instituto de Historia, Pontificia Universidad Católica de Chile, Santiago, Chile
Manuel Suazo-Álvarez
Laboratorio de Dendrocronología y Cambio Global. Instituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile
Mariano Masiokas
Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, IANIGLA-CONICET, Mendoza, Argentina
Gabriel Castro
Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Ariel Muñoz
Center for Climate and Resilience Research (CR2), Santiago, Chile
Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Centro de Acción Climática, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Mauricio Zambrano-Bigiarini
Center for Climate and Resilience Research (CR2), Santiago, Chile
Department of Civil Engineering, Universidad de La Frontera, Temuco, Chile
Rodrigo Fuster
Departamento de Ciencias Ambientales y Recursos Naturales Renovables, Universidad de Chile, Santiago, Chile
Lintsiee Godoy
Departamento de Ciencias Ambientales y Recursos Naturales Renovables, Universidad de Chile, Santiago, Chile
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Short summary
This study focuses on hyperdroughts (HDs) in central Chile, defined as years with a regional rainfall deficit exceeding 75 %. Only five HDs occurred in the last century (1924, 1968, 1998, 2019, 2021), but they caused disproportionate environmental and social impacts. In some systems, the effects were larger than expected from those considering moderate droughts and dependent on the antecedent conditions. HDs have analogs from the remote past, and they are expected to increase in the near future.
This study focuses on hyperdroughts (HDs) in central Chile, defined as years with a regional...
