Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data
The 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 So...
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ftpunivcchile:oai:repositorio.uc.cl:11534/78943 2024-06-09T07:40:37+00:00 Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data Cosentino, N. J. Gaiero, D. M. Lambert, F. 2024-01-10T13:44:50Z 18 páginas application/pdf https://repositorio.uc.cl/handle/11534/78943 https://doi.org/10.1029/2020JD034459 en eng AMER GEOPHYSICAL UNION doi:10.1029/2020JD034459 2169-8996 2169-897X https://doi.org/10.1029/2020JD034459 https://repositorio.uc.cl/handle/11534/78943 WOS:000688706700011 acceso restringido aerosols aridity dust Patagonia SOURCE REGIONS SOIL-MOISTURE MINERAL DUST AEOLIAN DUST TRANSPORT DESERT DEPOSITION IMPACT MODEL 13 Climate Action 11 Sustainable Cities and Communities 13 Acción por el clima 11 Ciudades y comunidades sostenibles artículo 2024 ftpunivcchile https://doi.org/10.1029/2020JD034459 2024-05-14T23:43:15Z The 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. Agencia Nacional de Promocion Cientifica y Tecnologica (ANPyCT) ANID-Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT) ANID/Fondecyt ANID/Fondo de Financiamiento de Centros de Investigacion en areas Prioritarias (FONDAP) ANID/Millennium Science Initiative/Millennium Nucleus Paleoclimate Article in Journal/Newspaper Antarc* Antarctica Pontificia Universidad Católica de Chile: Repositorio UC Patagonia Journal of Geophysical Research: Atmospheres 126 16 |
institution |
Open Polar |
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Pontificia Universidad Católica de Chile: Repositorio UC |
op_collection_id |
ftpunivcchile |
language |
English |
topic |
aerosols aridity dust Patagonia SOURCE REGIONS SOIL-MOISTURE MINERAL DUST AEOLIAN DUST TRANSPORT DESERT DEPOSITION IMPACT MODEL 13 Climate Action 11 Sustainable Cities and Communities 13 Acción por el clima 11 Ciudades y comunidades sostenibles |
spellingShingle |
aerosols aridity dust Patagonia SOURCE REGIONS SOIL-MOISTURE MINERAL DUST AEOLIAN DUST TRANSPORT DESERT DEPOSITION IMPACT MODEL 13 Climate Action 11 Sustainable Cities and Communities 13 Acción por el clima 11 Ciudades y comunidades sostenibles Cosentino, N. J. Gaiero, D. M. Lambert, F. Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
topic_facet |
aerosols aridity dust Patagonia SOURCE REGIONS SOIL-MOISTURE MINERAL DUST AEOLIAN DUST TRANSPORT DESERT DEPOSITION IMPACT MODEL 13 Climate Action 11 Sustainable Cities and Communities 13 Acción por el clima 11 Ciudades y comunidades sostenibles |
description |
The 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. Agencia Nacional de Promocion Cientifica y Tecnologica (ANPyCT) ANID-Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT) ANID/Fondecyt ANID/Fondo de Financiamiento de Centros de Investigacion en areas Prioritarias (FONDAP) ANID/Millennium Science Initiative/Millennium Nucleus Paleoclimate |
format |
Article in Journal/Newspaper |
author |
Cosentino, N. J. Gaiero, D. M. Lambert, F. |
author_facet |
Cosentino, N. J. Gaiero, D. M. Lambert, F. |
author_sort |
Cosentino, N. J. |
title |
Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
title_short |
Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
title_full |
Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
title_fullStr |
Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
title_full_unstemmed |
Present-Day Patagonian Dust Emissions: Combining Surface Visibility, Mass Flux, and Reanalysis Data |
title_sort |
present-day patagonian dust emissions: combining surface visibility, mass flux, and reanalysis data |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2024 |
url |
https://repositorio.uc.cl/handle/11534/78943 https://doi.org/10.1029/2020JD034459 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
doi:10.1029/2020JD034459 2169-8996 2169-897X https://doi.org/10.1029/2020JD034459 https://repositorio.uc.cl/handle/11534/78943 WOS:000688706700011 |
op_rights |
acceso restringido |
op_doi |
https://doi.org/10.1029/2020JD034459 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
16 |
_version_ |
1801383987734642688 |