Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region
Mineral aerosols profoundly impact global climate. Modeling of the dust cycle is the main tool used to gauge this effect. However, the scarcity of in situ modern dust flux measurements is the main reason why validation of existing models is hampered. We present the first long-term (14-year) record o...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Sage Publications
2023
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| Online Access: | http://hdl.handle.net/20.500.12123/14796 https://journals.sagepub.com/doi/10.1177/0959683619875198 https://doi.org/10.1177/0959683619875198 |
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| author | Cosentino, Nicolas Juan Gaiero, Diego Marcelo Torre, Gabriela Pasquini, Andrea Ines Coppo, Renata Arce, Juan Mateo Velez, Georgina |
| author_browse | Arce, Juan Mateo Coppo, Renata Cosentino, Nicolas Juan Gaiero, Diego Marcelo Pasquini, Andrea Ines Torre, Gabriela Velez, Georgina |
| author_facet | Cosentino, Nicolas Juan Gaiero, Diego Marcelo Torre, Gabriela Pasquini, Andrea Ines Coppo, Renata Arce, Juan Mateo Velez, Georgina |
| author_sort | Cosentino, Nicolas Juan |
| collection | INTA Digital |
| description | Mineral aerosols profoundly impact global climate. Modeling of the dust cycle is the main tool used to gauge this effect. However, the scarcity of in situ modern dust flux measurements is the main reason why validation of existing models is hampered. We present the first long-term (14-year) record of dust flux in the Pampas, southern South America, home to the largest loess deposit in the Southern Hemisphere. Measured 14-year mean deposition (40 g m−2 year−1) and horizontal (362 g m−2 year−1) fluxes imply that current models underestimate the power of the central Pampas as a dust sink. Based on cross-spectral analysis, both wet and, to a lesser extent, dry deposition are found to play significant roles in atmospheric dust extraction. Dust is sourced regionally from the South American Arid Diagonal and from the shores of Mar Chiquita lake (~260 km), which we find to be the main contributor of dust particles >30 µm. Cross-spectral and satellite image analyses show that surface wind speed and precipitation at the Puna-Altiplano Plateau are controlling factors for horizontal dust flux in the Pampas. El Niño Southern Oscillation probably plays a role in controlling interannual horizontal dust flux periodicities. Finally, preliminary comparisons between modern vertical dust fluxes and loess accumulation rates point to the Pampas as a more powerful dust sink during the last deglaciation and Antarctic Cold Reversal (18–12.5 ka). |
| format | info:ar-repo/semantics/artículo |
| id | INTA14796 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Sage Publications |
| publisherStr | Sage Publications |
| record_format | dspace |
| spelling | INTA147962023-07-21T12:42:47Z Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region Cosentino, Nicolas Juan Gaiero, Diego Marcelo Torre, Gabriela Pasquini, Andrea Ines Coppo, Renata Arce, Juan Mateo Velez, Georgina Polvo (contaminantes) Clima Análisis Espectral Imágenes por Satélites Datos Atmosféricos Dust Climate Spectral Analysis Satellite Imagery Atmospheric Data Región Pampeana Mineral aerosols profoundly impact global climate. Modeling of the dust cycle is the main tool used to gauge this effect. However, the scarcity of in situ modern dust flux measurements is the main reason why validation of existing models is hampered. We present the first long-term (14-year) record of dust flux in the Pampas, southern South America, home to the largest loess deposit in the Southern Hemisphere. Measured 14-year mean deposition (40 g m−2 year−1) and horizontal (362 g m−2 year−1) fluxes imply that current models underestimate the power of the central Pampas as a dust sink. Based on cross-spectral analysis, both wet and, to a lesser extent, dry deposition are found to play significant roles in atmospheric dust extraction. Dust is sourced regionally from the South American Arid Diagonal and from the shores of Mar Chiquita lake (~260 km), which we find to be the main contributor of dust particles >30 µm. Cross-spectral and satellite image analyses show that surface wind speed and precipitation at the Puna-Altiplano Plateau are controlling factors for horizontal dust flux in the Pampas. El Niño Southern Oscillation probably plays a role in controlling interannual horizontal dust flux periodicities. Finally, preliminary comparisons between modern vertical dust fluxes and loess accumulation rates point to the Pampas as a more powerful dust sink during the last deglaciation and Antarctic Cold Reversal (18–12.5 ka). EEA Marcos Juárez Fil: Cosentino, Nicolas Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Cosentino, Nicolas Juan. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Cosentino, Nicolas Juan. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico - CONICET - Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Gaiero, Diego Marcelo. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Gaiero, Diego Marcelo. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina Fil: Torre, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico - CONICET - Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Torre, Gabriela. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Torre, Gabriela. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina Fil: Pasquini, Andrea Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico - CONICET - Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Pasquini, Andrea Ines. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Pasquini, Andrea Ines. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina Fil: Coppo, Renata. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico - CONICET - Córdoba. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Coppo, Renata. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Coppo, Renata. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina Fil: Arce, Juan Mateo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Marcos Juárez; Argentina Fil: Velez, Georgina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Marcos Juárez; Argentina 2023-07-21T12:39:56Z 2023-07-21T12:39:56Z 2020-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14796 https://journals.sagepub.com/doi/10.1177/0959683619875198 0959-6836 1477-0911 https://doi.org/10.1177/0959683619875198 eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf South America .......... (continent) (World) 1000002 Sage Publications The Holocene 30 (4) : 575-588. (April 2020) |
| spellingShingle | Polvo (contaminantes) Clima Análisis Espectral Imágenes por Satélites Datos Atmosféricos Dust Climate Spectral Analysis Satellite Imagery Atmospheric Data Región Pampeana Cosentino, Nicolas Juan Gaiero, Diego Marcelo Torre, Gabriela Pasquini, Andrea Ines Coppo, Renata Arce, Juan Mateo Velez, Georgina Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title | Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title_full | Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title_fullStr | Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title_full_unstemmed | Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title_short | Atmospheric dust dynamics in southern South America: A 14-year modern dust record in the loessic Pampean region |
| title_sort | atmospheric dust dynamics in southern south america a 14 year modern dust record in the loessic pampean region |
| topic | Polvo (contaminantes) Clima Análisis Espectral Imágenes por Satélites Datos Atmosféricos Dust Climate Spectral Analysis Satellite Imagery Atmospheric Data Región Pampeana |
| url | http://hdl.handle.net/20.500.12123/14796 https://journals.sagepub.com/doi/10.1177/0959683619875198 https://doi.org/10.1177/0959683619875198 |
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