Dust transport enhanced land surface weatherability in a cooling world

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dc.catalogadorgrr
dc.contributor.authorYang, Y.
dc.contributor.authorGaly, A.
dc.contributor.authorZhang, J.
dc.contributor.authorLambert, Fabrice
dc.contributor.authorZhang, M.
dc.contributor.authorZhang, F.
dc.contributor.authorFang, X.
dc.date.accessioned2024-01-10T13:45:27Z
dc.date.available2024-01-10T13:45:27Z
dc.date.issued2023
dc.description.abstractThe weatherability of exposed silicate rocks drives the efficiency of climatic feedback on the geological carbon cycle through silicate weathering. However, the controls and evolution of land surface weatherability are not fully understood. Tectonically induced exposure of fresh silicates can induce a wide range of weatherability, depending on the maturity and lithology of the exhumed rocks. Here, we propose that aeolian dust has potentially been pivotal in sustaining land surface weatherability during global cooling. Our analysis of palaeoclimate simulations shows an additional transport of 1072 ± 69 Tg yr−1 of dust to regions with precipitation of more than 400 mm yr−1 during the Last Glacial Maximum compared to the pre-industrial period. As dust mainly contains fresh minerals with high surface areas, such dust transport markedly increases land surface weatherability, yielding an additional atmospheric CO2 consumption of 0.431 ± 0.030 Tmol yr−1, which would offset the reduced silicate weathering induced by weaker climatic forcing. It is suggested that a dustier world could increase global land surface weatherability, leading to a more buffered carbon cycle that sustained low atmospheric CO2 levels.
dc.description.funderSecond Tibetan Plateau Scientific Expedition and Research
dc.description.funderNational Natural Science Foundation of China
dc.description.funderFONDECYT
dc.description.funderNational Key Research and Development Program of China
dc.description.funderFONDAP
dc.fuente.origenScopus
dc.identifier.doi10.7185/geochemlet.2322
dc.identifier.eissn2410-3403
dc.identifier.issn2410-339X
dc.identifier.scopusidSCOPUS_ID:85168162352
dc.identifier.urihttps://doi.org/10.7185/geochemlet.2322
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79035
dc.information.autorucInstituto de Geografía; Lambert Fabrice; 0000-0002-2192-024X; 250043
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final39
dc.pagina.inicio36
dc.publisherEuropean Association of Geochemistry
dc.revistaGeochemical Perspectives Letters
dc.rightsacceso abierto
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subjectCarbon cycle
dc.subjectCooling
dc.subjectDust
dc.subjectLand surface
dc.subjectLast Glacial Maximum
dc.subjectPaleoclimate
dc.subjectPrecipitation (climatology)
dc.subjectEolian deposit
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.titleDust transport enhanced land surface weatherability in a cooling world
dc.typeartículo
dc.volumen26
sipa.codpersvinculados250043
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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