Influence of the large-scale climate variability on daily rainfall extremes over Argentina
A singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and sea surface temperature (SST) anomalies from 17.5°N-90°S to describe and understand the influence of the large-scale variability of the SSTs on the regional extrem...
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todo:paper_08998418_v36_n1_p412_Robledo2023-10-03T15:44:24Z Influence of the large-scale climate variability on daily rainfall extremes over Argentina Robledo, F.A. Vera, C. Penalba, O.C. Argentina Daily precipitation Large-scale climate variability Tropical oceans Atmospheric pressure Atmospheric temperature Climate change Climatology Moisture Oceanography Singular value decomposition Surface waters Tropics Argentina Circulation anomalies Climate variability Daily precipitations Eastern tropical pacific Sea surface temperature anomalies Southeastern South America Tropical ocean Rain atmospheric circulation climate variation El Nino-Southern Oscillation precipitation (climatology) rainfall regional climate sea surface temperature teleconnection Argentina Atlantic Ocean Atlantic Ocean (Tropical) Indian Ocean Indian Ocean (West) Pacific Ocean Pacific Ocean (South) Pacific Ocean (Tropical) A singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and sea surface temperature (SST) anomalies from 17.5°N-90°S to describe and understand the influence of the large-scale variability of the SSTs on the regional extreme rainfall events for spring summer, autumn and winter. Three main leading modes were identified in agreement with previous works. Mode 1 activity is strongly related to El Niño-Southern Oscillation (ENSO). Warm anomalies in the central-eastern tropical Pacific and western Indian Ocean induce circulation anomalies extended along the South Pacific and the development of a continental-scale circulation gyre in South America promoting moisture convergence, and in turn favouring DIER positive anomalies, in eastern Argentina. The combined influence of SST anomalies in the tropical Atlantic and western tropical Pacific characterizes Mode 2 activity, which induces an anticyclonic (cyclonic) circulation gyre in southeastern South America promoting anomalous moisture convergence (divergence) and thus positive (negative) DIER anomalies in eastern Argentina in spring and fall (summer and winter). Finally, Mode 3 activity is also influenced by SST anomalies in tropical central-eastern Pacific from winter to summer. The associated teleconnections contribute to the development of a cyclonic circulation mainly influencing southeastern South America (SESA) circulation to the north of 30°S from summer to winter, and further south in spring. © 2016 Royal Meteorological Society. Fil:Robledo, F.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vera, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Penalba, O.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08998418_v36_n1_p412_Robledo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Daily precipitation Large-scale climate variability Tropical oceans Atmospheric pressure Atmospheric temperature Climate change Climatology Moisture Oceanography Singular value decomposition Surface waters Tropics Argentina Circulation anomalies Climate variability Daily precipitations Eastern tropical pacific Sea surface temperature anomalies Southeastern South America Tropical ocean Rain atmospheric circulation climate variation El Nino-Southern Oscillation precipitation (climatology) rainfall regional climate sea surface temperature teleconnection Argentina Atlantic Ocean Atlantic Ocean (Tropical) Indian Ocean Indian Ocean (West) Pacific Ocean Pacific Ocean (South) Pacific Ocean (Tropical) |
| spellingShingle |
Argentina Daily precipitation Large-scale climate variability Tropical oceans Atmospheric pressure Atmospheric temperature Climate change Climatology Moisture Oceanography Singular value decomposition Surface waters Tropics Argentina Circulation anomalies Climate variability Daily precipitations Eastern tropical pacific Sea surface temperature anomalies Southeastern South America Tropical ocean Rain atmospheric circulation climate variation El Nino-Southern Oscillation precipitation (climatology) rainfall regional climate sea surface temperature teleconnection Argentina Atlantic Ocean Atlantic Ocean (Tropical) Indian Ocean Indian Ocean (West) Pacific Ocean Pacific Ocean (South) Pacific Ocean (Tropical) Robledo, F.A. Vera, C. Penalba, O.C. Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| topic_facet |
Argentina Daily precipitation Large-scale climate variability Tropical oceans Atmospheric pressure Atmospheric temperature Climate change Climatology Moisture Oceanography Singular value decomposition Surface waters Tropics Argentina Circulation anomalies Climate variability Daily precipitations Eastern tropical pacific Sea surface temperature anomalies Southeastern South America Tropical ocean Rain atmospheric circulation climate variation El Nino-Southern Oscillation precipitation (climatology) rainfall regional climate sea surface temperature teleconnection Argentina Atlantic Ocean Atlantic Ocean (Tropical) Indian Ocean Indian Ocean (West) Pacific Ocean Pacific Ocean (South) Pacific Ocean (Tropical) |
| description |
A singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and sea surface temperature (SST) anomalies from 17.5°N-90°S to describe and understand the influence of the large-scale variability of the SSTs on the regional extreme rainfall events for spring summer, autumn and winter. Three main leading modes were identified in agreement with previous works. Mode 1 activity is strongly related to El Niño-Southern Oscillation (ENSO). Warm anomalies in the central-eastern tropical Pacific and western Indian Ocean induce circulation anomalies extended along the South Pacific and the development of a continental-scale circulation gyre in South America promoting moisture convergence, and in turn favouring DIER positive anomalies, in eastern Argentina. The combined influence of SST anomalies in the tropical Atlantic and western tropical Pacific characterizes Mode 2 activity, which induces an anticyclonic (cyclonic) circulation gyre in southeastern South America promoting anomalous moisture convergence (divergence) and thus positive (negative) DIER anomalies in eastern Argentina in spring and fall (summer and winter). Finally, Mode 3 activity is also influenced by SST anomalies in tropical central-eastern Pacific from winter to summer. The associated teleconnections contribute to the development of a cyclonic circulation mainly influencing southeastern South America (SESA) circulation to the north of 30°S from summer to winter, and further south in spring. © 2016 Royal Meteorological Society. |
| format |
JOUR |
| author |
Robledo, F.A. Vera, C. Penalba, O.C. |
| author_facet |
Robledo, F.A. Vera, C. Penalba, O.C. |
| author_sort |
Robledo, F.A. |
| title |
Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| title_short |
Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| title_full |
Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| title_fullStr |
Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| title_full_unstemmed |
Influence of the large-scale climate variability on daily rainfall extremes over Argentina |
| title_sort |
influence of the large-scale climate variability on daily rainfall extremes over argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_08998418_v36_n1_p412_Robledo |
| work_keys_str_mv |
AT robledofa influenceofthelargescaleclimatevariabilityondailyrainfallextremesoverargentina AT verac influenceofthelargescaleclimatevariabilityondailyrainfallextremesoverargentina AT penalbaoc influenceofthelargescaleclimatevariabilityondailyrainfallextremesoverargentina |
| _version_ |
1782029745152589824 |