Revisiting the Potential to Narrow Model Uncertainty in the Projections of Arctic Runoff - Météo-France
Article Dans Une Revue Geophysical Research Letters Année : 2023

Revisiting the Potential to Narrow Model Uncertainty in the Projections of Arctic Runoff

Emma Dutot
  • Fonction : Auteur

Résumé

Abstract Despite multiple advances in the understanding of the water cycle intensification in a warmer climate, climate models still diverge in their hydrological projections. Here we constrain annual runoff projections over individual and aggregated Arctic river basins. For this purpose, we use two ensembles of global climate models and two statistical methods: a regression scheme assuming similar runoff sensitivities at interannual versus climate change timescales, and a Bayesian method where models are used to derive a posterior runoff response conditioned on historical observations. While both techniques are shown to narrow model uncertainties, more or less substantially depending on rivers, the Bayesian method is less sensitive to the choice of the model ensemble and is more skillful when tested with synthetic observations. It has also been applied over the whole Arctic watershed, showing so far a limited narrowing of the inter‐model spread, but its skill will further improve with increasing climate change.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2023 - Dutot - Revisiting the Potential to Narrow Model Uncertainty in the Projections of.pdf (790.67 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

meteo-04439017 , version 1 (05-02-2024)

Identifiants

Citer

Emma Dutot, Hervé Douville. Revisiting the Potential to Narrow Model Uncertainty in the Projections of Arctic Runoff. Geophysical Research Letters, 2023, 50 (16), ⟨10.1029/2023GL104039⟩. ⟨meteo-04439017⟩
14 Consultations
16 Téléchargements

Altmetric

Partager

More