Skip to Main content Skip to Navigation
Journal articles

Rapid response of silicate weathering rates to climate change in the Himalaya

Abstract : Chemical weathering of continental rocks plays a central role in regulating the carbon cycle and the Earth's climate (Walker et al., 1981; Berner et al., 1983), accounting for nearly half the consumption of atmospheric carbon dioxide globally (Beaulieu et al., 2012). However, the role of climate variability on chemical weathering is still strongly debated. Here we focus on the Himalayan range and use the lithium isotopic composition of clays in fluvial terraces to show a tight coupling between climate change and chemical weathering over the past 40 ka. Between 25 and 10 ka ago, weathering rates decrease despite temperature increase and monsoon intensification. This suggests that at this timescale, temperature plays a secondary role compared to runoff and physical erosion, which inhibit chemical weathering by accelerating sediment transport and act as fundamental controls in determining the feedback between chemical weathering and atmospheric carbon dioxide.
Document type :
Journal articles
Complete list of metadata

Cited literature [29 references]  Display  Hide  Download
Contributor : CRPG UL Connect in order to contact the contributor
Submitted on : Thursday, April 19, 2018 - 2:34:36 PM
Last modification on : Friday, March 4, 2022 - 10:08:02 AM
Long-term archiving on: : Tuesday, September 18, 2018 - 1:27:19 PM


Publisher files allowed on an open archive




A. Dosseto, N. Vigier, R Joannes-Boyau, I Moffat, T Singh, et al.. Rapid response of silicate weathering rates to climate change in the Himalaya. Geochemical Perspectives Letters, European Assoication of Geochemistry, 2015, 1 (1), pp.10 - 19. ⟨10.7185/geochemlet.1502⟩. ⟨hal-01771250⟩



Record views


Files downloads