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

Juan Luis Lechuga-Crespo, Sabine Sauvage, Estilita Ruiz-Romera, Michelle T.H. van Vliet, Jean Luc Probst, Clément Fabre, José Miguel Sánchez-Pérez*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

This study simulates 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 the RCP 2.6 and RCP 8.5 climate scenarios were assessed relative to a historical baseline (1969–1999) using a cascade of models accounting for the hydrological evolution under climate change scenarios. Here we show that the global temporal evolution of the CO2 uptake presents a general increase in the annual amount of CO2 consumed from 0.247 ± 0.045 Pg C year−1 to 0.261 and 0.273 ± 0.054 Pg C year−1, respectively for RCP 2.6 and RCP 8.5. Despite showing a general increase in the global daily carbon sequestration, both climate scenarios show 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.

Original languageEnglish
Article number23588
Pages (from-to)1-8
JournalScientific Reports
Volume11
Issue number1
DOIs
Publication statusPublished - Dec 2021

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