Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data

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dc.contributor.authorCosentino, N. J.
dc.contributor.authorGaiero, D. M.
dc.contributor.authorLambert, F.
dc.date.accessioned2024-01-10T13:44:50Z
dc.date.available2024-01-10T13:44:50Z
dc.date.issued2021
dc.description.abstractThe magnitude of the climatic forcing associated with mineral dust aerosols remains uncertain due in part to a lack of observations on dust sources. While modeling and satellite studies provide spatially extensive constraints, they must be supported by surface-validating dust monitoring. Southern South America is the main dust source to the southern oceans (>45 degrees S), a region of low biological productivity potentially susceptible to increased micronutrient fertilization through dust deposition, as well as one of the main dust sources to Antarctica, implying long-range transport of dust from Patagonia and potentially affecting snow cover albedo. We present multiyear time series of dust-related visibility reduction (DRVR) and dust mass flux in Patagonia. We find that local DRVR is partly controlled by long-term (i.e., months) water deficit, while same-day conditions play a smaller role, reflective of water retention properties of fine-grained dust-emitting soils in low-moisture conditions. This is supported independently by reanalysis data showing that large-scale dust outbreaks are usually associated with anomalously high long-term water deficit. By combining visibility data, surface dust sampling, and particle dispersion modeling, we derive regional dust emission rates. Our results suggest that the inclusion of long-term soil hydrologic balance parameterizations under low-moisture conditions may improve the performance of dust emission schemes in Earth system models.
dc.description.funderAgencia Nacional de Promocion Cientifica y Tecnologica (ANPyCT)
dc.description.funderANID-Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT)
dc.description.funderANID/Fondecyt
dc.description.funderANID/Fondo de Financiamiento de Centros de Investigacion en areas Prioritarias (FONDAP)
dc.description.funderANID/Millennium Science Initiative/Millennium Nucleus Paleoclimate
dc.fechaingreso.objetodigital2024-05-02
dc.format.extent18 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1029/2020JD034459
dc.identifier.eissn2169-8996
dc.identifier.issn2169-897X
dc.identifier.urihttps://doi.org/10.1029/2020JD034459
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78943
dc.identifier.wosidWOS:000688706700011
dc.information.autorucFacultad de Historia, Geografía y Ciencia Política; Lambert No Informado, Fabrice; S/I; 250043
dc.issue.numero16
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherAMER GEOPHYSICAL UNION
dc.revistaJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
dc.rightsacceso restringido
dc.subjectaerosols
dc.subjectaridity
dc.subjectdust
dc.subjectPatagonia
dc.subjectSOURCE REGIONS
dc.subjectSOIL-MOISTURE
dc.subjectMINERAL DUST
dc.subjectAEOLIAN DUST
dc.subjectTRANSPORT
dc.subjectDESERT
dc.subjectDEPOSITION
dc.subjectAEROSOLS
dc.subjectIMPACT
dc.subjectMODEL
dc.subject.ods13 Climate Action
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa13 Acción por el clima
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titlePresent-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data
dc.typeartículo
dc.volumen126
sipa.codpersvinculados250043
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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