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Pré-Publication, Document De Travail Année : 2021

Global carbon sequestration through continental chemical weathering in a climatic change context

Juan Luis Lechuga-Crespo
Sabine Sauvage
Estilita Ruiz-Romera
  • Fonction : Auteur
Jean-Luc Probst

Résumé

Abstract Here, we simulate carbon dioxide (CO2) sequestration in 300 major world river basins (about 70% of global surface area) through carbonates dissolution and silicate hydrolysis. For each river basin, the daily timescale impacts under both the RCP 2.6 and RCP 8.5 climate scenarios were assessed relative to a historic baseline (1969-1999) using a cascade of models accounting for the hydrological evolution under climate change scenarios. Here we show that global temporal evolution of the CO2 uptake presents a general increase in the annual amount of CO2 consumed from 0.247 Pg C·y-1 to 0.261 and 0.273 Pg C·y-1, respectively for RCP 2.6 and RCP 8.5. Besides, despite showing a general increase for the global daily carbon sequestration, both climate scenarios present a decrease between June and August. Such projected changes have been mapped and evaluated against changes in hydrology, identifying hot spots and moments for the annual and seasonal periods.

Dates et versions

hal-03430616 , version 1 (16-11-2021)

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Citer

Juan Luis Lechuga-Crespo, Sabine Sauvage, Michelle Vanvliet, Estilita Ruiz-Romera, Jean-Luc Probst, et al.. Global carbon sequestration through continental chemical weathering in a climatic change context. 2021. ⟨hal-03430616⟩

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