The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation
The Eastern Pacific (EP) and Central Pacific (CP) El Niño-Southern Oscillation (ENSO) types and their impacts on the tropical North Atlantic (TNA) SST variability and 15°N–15°S South American precipitation during the warm and cold phases of the Atlantic Multidecadal Oscillation (WAMO and CAMO) were...
| Autor principal: | Figliuolo, Guilherme C. |
|---|---|
| Outros Autores: | Andreoli, Rita Valéria, Kayano, Mary Toshie, Costa, Jean Antunes Custódio da, Rego, Willy Hagi Teles, Moraes, Djanir Sales de |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
International Journal of Climatology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16499 |
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oai:repositorio:1-16499 |
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oai:repositorio:1-16499 The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation Figliuolo, Guilherme C. Andreoli, Rita Valéria Kayano, Mary Toshie Costa, Jean Antunes Custódio da Rego, Willy Hagi Teles Moraes, Djanir Sales de Atmospheric Pressure Nickel Compounds Oceanography Rain Tropics Atlantic Multidecadal Oscillations Eastern Equatorial Pacific Low Frequency Oscillations Precipitation Anomalies South America Teleconnection Patterns Teleconnections Tropical Atlantic Climatology Atlantic Multidecadal Oscillation Climate Effect El Nino-southern Oscillation Precipitation Assessment Sea Surface Temperature Teleconnection Walker Circulation Warming Atlantic Ocean Atlantic Ocean (north) Brasil Pacific Ocean Pacific Ocean (central) Pacific Ocean (east) The Eastern Pacific (EP) and Central Pacific (CP) El Niño-Southern Oscillation (ENSO) types and their impacts on the tropical North Atlantic (TNA) SST variability and 15°N–15°S South American precipitation during the warm and cold phases of the Atlantic Multidecadal Oscillation (WAMO and CAMO) were evaluated during the 1901–2012 period. The results show more frequent ENSO events during the CAMO. The El Niño (EN) (La Niña [LN]) events, regardless of type (EP or CP), during the WAMO (CAMO) were accompanied by a warming (cooling) in the TNA after its mature phases. In these cases, extratropical teleconnection patterns are established through variations in the Pacific/North America (PNA) teleconnection pattern and are accompanied by variations in the Walker circulation. For the EN (LN) in the CAMO (WAMO), the tropical teleconnections occur predominant, through the Walker cell and the zonal inter-basin gradient, which is intensified due to the SST gradient between the eastern equatorial Pacific (non-neutral anomalies) and the equatorial Atlantic (neutral anomalies). These circulation pattern changes affect the precipitation patterns in the 15°N–15°S South American sector during December–January–February (D(0)JF(+1)) and March–April–May (MAM(+1)). The EP EN (EPEN) events are associated with the intensification of the negative precipitation anomalies in northeastern Brazil (NEB) during the WAMO and in the central part of the Amazon during the CAMO. In the case of CP EN (CPEN) events, the greatest differences between the AMO phases occur during MAM(+1), with reverse sign anomalies over northwestern South America. In the case of LN events, the largest differences occur in NEB, with reduced rainfall in the WAMO, regardless of type EP or CP. The results presented here highlight the role of low frequency oscillations in defining the teleconnection patterns between tropical Pacific and Atlantic Oceans, not discussed previously. © 2019 Royal Meteorological Society 2020-06-15T21:35:05Z 2020-06-15T21:35:05Z 2020 Artigo https://repositorio.inpa.gov.br/handle/1/16499 10.1002/joc.6309 en Volume 40, Número 4, Pags. 1943-1964 Restrito International Journal of Climatology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Atmospheric Pressure Nickel Compounds Oceanography Rain Tropics Atlantic Multidecadal Oscillations Eastern Equatorial Pacific Low Frequency Oscillations Precipitation Anomalies South America Teleconnection Patterns Teleconnections Tropical Atlantic Climatology Atlantic Multidecadal Oscillation Climate Effect El Nino-southern Oscillation Precipitation Assessment Sea Surface Temperature Teleconnection Walker Circulation Warming Atlantic Ocean Atlantic Ocean (north) Brasil Pacific Ocean Pacific Ocean (central) Pacific Ocean (east) |
| spellingShingle |
Atmospheric Pressure Nickel Compounds Oceanography Rain Tropics Atlantic Multidecadal Oscillations Eastern Equatorial Pacific Low Frequency Oscillations Precipitation Anomalies South America Teleconnection Patterns Teleconnections Tropical Atlantic Climatology Atlantic Multidecadal Oscillation Climate Effect El Nino-southern Oscillation Precipitation Assessment Sea Surface Temperature Teleconnection Walker Circulation Warming Atlantic Ocean Atlantic Ocean (north) Brasil Pacific Ocean Pacific Ocean (central) Pacific Ocean (east) Figliuolo, Guilherme C. The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| topic_facet |
Atmospheric Pressure Nickel Compounds Oceanography Rain Tropics Atlantic Multidecadal Oscillations Eastern Equatorial Pacific Low Frequency Oscillations Precipitation Anomalies South America Teleconnection Patterns Teleconnections Tropical Atlantic Climatology Atlantic Multidecadal Oscillation Climate Effect El Nino-southern Oscillation Precipitation Assessment Sea Surface Temperature Teleconnection Walker Circulation Warming Atlantic Ocean Atlantic Ocean (north) Brasil Pacific Ocean Pacific Ocean (central) Pacific Ocean (east) |
| description |
The Eastern Pacific (EP) and Central Pacific (CP) El Niño-Southern Oscillation (ENSO) types and their impacts on the tropical North Atlantic (TNA) SST variability and 15°N–15°S South American precipitation during the warm and cold phases of the Atlantic Multidecadal Oscillation (WAMO and CAMO) were evaluated during the 1901–2012 period. The results show more frequent ENSO events during the CAMO. The El Niño (EN) (La Niña [LN]) events, regardless of type (EP or CP), during the WAMO (CAMO) were accompanied by a warming (cooling) in the TNA after its mature phases. In these cases, extratropical teleconnection patterns are established through variations in the Pacific/North America (PNA) teleconnection pattern and are accompanied by variations in the Walker circulation. For the EN (LN) in the CAMO (WAMO), the tropical teleconnections occur predominant, through the Walker cell and the zonal inter-basin gradient, which is intensified due to the SST gradient between the eastern equatorial Pacific (non-neutral anomalies) and the equatorial Atlantic (neutral anomalies). These circulation pattern changes affect the precipitation patterns in the 15°N–15°S South American sector during December–January–February (D(0)JF(+1)) and March–April–May (MAM(+1)). The EP EN (EPEN) events are associated with the intensification of the negative precipitation anomalies in northeastern Brazil (NEB) during the WAMO and in the central part of the Amazon during the CAMO. In the case of CP EN (CPEN) events, the greatest differences between the AMO phases occur during MAM(+1), with reverse sign anomalies over northwestern South America. In the case of LN events, the largest differences occur in NEB, with reduced rainfall in the WAMO, regardless of type EP or CP. The results presented here highlight the role of low frequency oscillations in defining the teleconnection patterns between tropical Pacific and Atlantic Oceans, not discussed previously. © 2019 Royal Meteorological Society |
| format |
Artigo |
| author |
Figliuolo, Guilherme C. |
| author2 |
Andreoli, Rita Valéria Kayano, Mary Toshie Costa, Jean Antunes Custódio da Rego, Willy Hagi Teles Moraes, Djanir Sales de |
| author2Str |
Andreoli, Rita Valéria Kayano, Mary Toshie Costa, Jean Antunes Custódio da Rego, Willy Hagi Teles Moraes, Djanir Sales de |
| title |
The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| title_short |
The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| title_full |
The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| title_fullStr |
The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| title_full_unstemmed |
The role of the Atlantic Multidecadal Oscillation precondition in the teleconnection of different El Niño-Southern Oscillation types and impacts on the 15°N–15°S South American sector precipitation |
| title_sort |
role of the atlantic multidecadal oscillation precondition in the teleconnection of different el niño-southern oscillation types and impacts on the 15°n–15°s south american sector precipitation |
| publisher |
International Journal of Climatology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16499 |
| _version_ |
1787142422080258048 |
| score |
11.755432 |