Estimating regional flood discharge during Palaeocene-Eocene global warming - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Scientific Reports Year : 2018

Estimating regional flood discharge during Palaeocene-Eocene global warming

Chen Chen
  • Function : Author
Brady Z. Foreman
  • Function : Author
Hima J. Hassenruck-Gudipati
  • Function : Author
Thierry Adatte
Louis Honegger
  • Function : Author
Marc Perret
  • Function : Author
Appy Sluijs
  • Function : Author
Sébastien Castelltort
  • Function : Author


Among the most urgent challenges in future climate change scenarios is accurately predicting the magnitude to which precipitation extremes will intensify. Analogous changes have been reported for an episode of millennial-scale 5 °C warming, termed the Palaeocene-Eocene Thermal Maximum (PETM; 56 Ma), providing independent constraints on hydrological response to global warming. However, quantifying hydrologic extremes during geologic global warming analogs has proven difficult. Here we show that water discharge increased by at least 1.35 and potentially up to 14 times during the early phase of the PETM in northern Spain. We base these estimates on analyses of channel dimensions, sediment grain size, and palaeochannel gradients across the early PETM, which is regionally marked by an abrupt transition from overbank palaeosol deposits to conglomeratic fluvial sequences. We infer that extreme floods and channel mobility quickly denuded surrounding soil-mantled landscapes, plausibly enhanced by regional vegetation decline, and exported enormous quantities of terrigenous material towards the ocean. These results support hypotheses that extreme rainfall events and associated risks of flooding increase with global warming at similar, but potentially at much higher, magnitudes than currently predicted.
Fichier principal
Vignette du fichier
s41598-018-31076-3.pdf (1.91 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03661394 , version 1 (06-05-2022)





Chen Chen, Laure Guerit, Brady Z. Foreman, Hima J. Hassenruck-Gudipati, Thierry Adatte, et al.. Estimating regional flood discharge during Palaeocene-Eocene global warming. Scientific Reports, 2018, 8, ⟨10.1038/s41598-018-31076-3⟩. ⟨insu-03661394⟩
54 View
11 Download



Gmail Facebook X LinkedIn More