Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina
Summer precipitation is a crucial variable for Subtropical Argentina (STAr) from a social and economic perspective. Monthly forcing mechanism variations of subregional summer precipitation over STAr are studied. Most subregional precipitation anomalies are related to a convection dipole between east...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Elsevier
2023
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| Online Access: | http://hdl.handle.net/20.500.12123/14709 https://www.sciencedirect.com/science/article/pii/S0169809523000066 https://doi.org/10.1016/j.atmosres.2023.106609 |
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| author | Hurtado, Santiago Ignacio Agosta Scarel, Eduardo A. Zaninelli, Pablo G. |
| author_browse | Agosta Scarel, Eduardo A. Hurtado, Santiago Ignacio Zaninelli, Pablo G. |
| author_facet | Hurtado, Santiago Ignacio Agosta Scarel, Eduardo A. Zaninelli, Pablo G. |
| author_sort | Hurtado, Santiago Ignacio |
| collection | INTA Digital |
| description | Summer precipitation is a crucial variable for Subtropical Argentina (STAr) from a social and economic perspective. Monthly forcing mechanism variations of subregional summer precipitation over STAr are studied. Most subregional precipitation anomalies are related to a convection dipole between eastern STAr and the South Atlantic Convergence Zone (SACZ) region. In this sense, wet (dry) conditions in subregions of eastern STAr are associated with anomalous low-level anticyclonic (cyclonic) tropospheric circulation in southeastern Brazil. The anomalies are mainly associated with a teleconnection via Rossby wave train that propagate through the South Pacific, which is link to El Niño Southern Oscillation (ENSO) phenomena in December, to enhanced convection in the western tropical Pacific in January, and to conversion of mean flow kinetic energy in January and February. Also, the anomalous low-level anticyclonic tropospheric circulation in southeastern Brazil (wet conditions in eastern STAr) is related to anomalous Walker cell caused mainly by an active convection core in the western Pacific basin probably owing to the Madden-Julian Oscillation (MJO) phases 6 and 7. In addition, dry (wet) conditions in subregions of southwestern STAr in January and February are associated with an anomalous low-level tropospheric anticyclonic (cyclonic) circulation over Patagonia and the Argentinian Sea. The tropospheric anticyclonic circulation anomaly center in February appears to be generated by vorticity flux convergence owing to a quasi-stationary Rossby wave activity from the previous month (January) that generates positive geopotential height anomalies over Patagonia and surrounding areas. |
| format | info:ar-repo/semantics/artículo |
| id | INTA14709 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA147092025-04-24T10:20:49Z Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina Hurtado, Santiago Ignacio Agosta Scarel, Eduardo A. Zaninelli, Pablo G. Precipitación Atmosférica Verano Zona Subtropical Teledetección Clima Argentina Precipitation Summer Subtropical Zones Remote Sensing Climate Summer precipitation is a crucial variable for Subtropical Argentina (STAr) from a social and economic perspective. Monthly forcing mechanism variations of subregional summer precipitation over STAr are studied. Most subregional precipitation anomalies are related to a convection dipole between eastern STAr and the South Atlantic Convergence Zone (SACZ) region. In this sense, wet (dry) conditions in subregions of eastern STAr are associated with anomalous low-level anticyclonic (cyclonic) tropospheric circulation in southeastern Brazil. The anomalies are mainly associated with a teleconnection via Rossby wave train that propagate through the South Pacific, which is link to El Niño Southern Oscillation (ENSO) phenomena in December, to enhanced convection in the western tropical Pacific in January, and to conversion of mean flow kinetic energy in January and February. Also, the anomalous low-level anticyclonic tropospheric circulation in southeastern Brazil (wet conditions in eastern STAr) is related to anomalous Walker cell caused mainly by an active convection core in the western Pacific basin probably owing to the Madden-Julian Oscillation (MJO) phases 6 and 7. In addition, dry (wet) conditions in subregions of southwestern STAr in January and February are associated with an anomalous low-level tropospheric anticyclonic (cyclonic) circulation over Patagonia and the Argentinian Sea. The tropospheric anticyclonic circulation anomaly center in February appears to be generated by vorticity flux convergence owing to a quasi-stationary Rossby wave activity from the previous month (January) that generates positive geopotential height anomalies over Patagonia and surrounding areas. EEA Bariloche Fil: Hurtado, Santiago Ignacio. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Hurtado, Santiago Ignacio. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Hurtado, Santiago Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Hurtado, Santiago Ignacio. Universidad de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Agosta, Eduardo A. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Agosta, Eduardo A. Universidad de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Zaninelli, Pablo G. Consejo Superior de Investigaciones Científicas. Instituto de Geociencias (IGEO); España Fil: Zaninelli, Pablo G. Universidad Complutense de Madrid. Instituto de Geociencias (IGEO); España Fil: Zaninelli, Pablo G. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Zaninelli, Pablo G. Universidad de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina 2023-07-06T16:29:08Z 2023-07-06T16:29:08Z 2023-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14709 https://www.sciencedirect.com/science/article/pii/S0169809523000066 0169-8095 1873-2895 https://doi.org/10.1016/j.atmosres.2023.106609 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 Argentina .......... (nation) (World, South America) 7006477 Elsevier Atmospheric Research 285 : 106609. (April 2023) |
| spellingShingle | Precipitación Atmosférica Verano Zona Subtropical Teledetección Clima Argentina Precipitation Summer Subtropical Zones Remote Sensing Climate Hurtado, Santiago Ignacio Agosta Scarel, Eduardo A. Zaninelli, Pablo G. Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title | Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title_full | Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title_fullStr | Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title_full_unstemmed | Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title_short | Monthly variations of forcing mechanisms of austral summer precipitation in subtropical Argentina |
| title_sort | monthly variations of forcing mechanisms of austral summer precipitation in subtropical argentina |
| topic | Precipitación Atmosférica Verano Zona Subtropical Teledetección Clima Argentina Precipitation Summer Subtropical Zones Remote Sensing Climate |
| url | http://hdl.handle.net/20.500.12123/14709 https://www.sciencedirect.com/science/article/pii/S0169809523000066 https://doi.org/10.1016/j.atmosres.2023.106609 |
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