Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns
Previous papers have shown that the rainfall anomalies over the Amazon region result from the independent or combined effects of the eastern tropical Pacific and Atlantic Basins. Here, the monthly rainfall data of Itaituba, Manaus, Parintins, and Santarém for the 1931-1996 period has been used to cl...
| Autor principal: | Andreoli, Rita Valéria |
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| Outros Autores: | Souza, Rodrigo Augusto Ferreira de, Kayano, Mary Toshie, Cândido, Luiz Antônio |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
International Journal of Climatology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18025 |
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oai:repositorio:1-18025 |
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oai:repositorio:1-18025 Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns Andreoli, Rita Valéria Souza, Rodrigo Augusto Ferreira de Kayano, Mary Toshie Cândido, Luiz Antônio Amazon Region Atlantic Basin Atmospheric Pattern Climate Condition Climate Variability Combined Effect Differential Factors Dry Seasons Eastern Amazons Eastern Tropical Pacific New Results Pacific Sector Precipitation Extremes Rainfall Anomaly Rainfall Data Rainy Seasons Sea Level Pressure Sea Surface Temperature (sst) Seasonal Differences Seasonal Phase Locking Tropical Atlantic Tropical Ocean Atmospheric Pressure Climatology Drought Earth Atmosphere Nickel Compounds Sea Level Tropics Rain Climate Conditions Climate Variation El Nino-southern Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Seasonal Variation Temperature Anomaly Temperature Gradient Amazonas Amazonia Atlantic Ocean Atlantic Ocean (tropical) Brasil Manaus Pacific Ocean Pacific Ocean (tropical) Para [brazil] Santarem [para] Previous papers have shown that the rainfall anomalies over the Amazon region result from the independent or combined effects of the eastern tropical Pacific and Atlantic Basins. Here, the monthly rainfall data of Itaituba, Manaus, Parintins, and Santarém for the 1931-1996 period has been used to classify its dry and rainy seasons into dry, very dry, wet, and very wet categories. The sea surface temperature (SST) and sea level pressure (SLP) patterns associated with these climate conditions in the central and eastern Amazon are discussed in terms of the relative influence of the tropical Atlantic and Pacific sectors, as well as their seasonal differences. These seasonal differences are, in part, determined by the seasonal phase locking of the El Niño-Southern Oscillation (ENSO) and Atlantic equatorial modes. The rainy season cases are mostly driven by the ENSO and the inter-hemispheric SST gradient mode in the tropical Atlantic, and the dry season cases, by the Atlantic equatorial mode (AEM). A new result here is the role of the inter-Pacific-Atlantic anomalous SST gradient mode on the rainfall anomalies. This mode acts concordantly with the Atlantic modes on the rainfall over the central and eastern Amazon, and is responsible for precipitation extreme cases during the dry season and for the very wet rainy season case. In other words, the intense inter-Pacific-Atlantic mode for these cases is the differential factor in relation to the moderate cases. The results here, especially in relation to the role of the inter-Pacific-Atlantic gradient in the central and eastern Amazon precipitation, have not been discussed before and should be taken into consideration in the diagnostic activities. © 2011 Royal Meteorological Society. 2020-06-15T21:51:03Z 2020-06-15T21:51:03Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/18025 10.1002/joc.2345 en Volume 32, Número 8, Pags. 1193-1205 Restrito International Journal of Climatology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Amazon Region Atlantic Basin Atmospheric Pattern Climate Condition Climate Variability Combined Effect Differential Factors Dry Seasons Eastern Amazons Eastern Tropical Pacific New Results Pacific Sector Precipitation Extremes Rainfall Anomaly Rainfall Data Rainy Seasons Sea Level Pressure Sea Surface Temperature (sst) Seasonal Differences Seasonal Phase Locking Tropical Atlantic Tropical Ocean Atmospheric Pressure Climatology Drought Earth Atmosphere Nickel Compounds Sea Level Tropics Rain Climate Conditions Climate Variation El Nino-southern Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Seasonal Variation Temperature Anomaly Temperature Gradient Amazonas Amazonia Atlantic Ocean Atlantic Ocean (tropical) Brasil Manaus Pacific Ocean Pacific Ocean (tropical) Para [brazil] Santarem [para] |
| spellingShingle |
Amazon Region Atlantic Basin Atmospheric Pattern Climate Condition Climate Variability Combined Effect Differential Factors Dry Seasons Eastern Amazons Eastern Tropical Pacific New Results Pacific Sector Precipitation Extremes Rainfall Anomaly Rainfall Data Rainy Seasons Sea Level Pressure Sea Surface Temperature (sst) Seasonal Differences Seasonal Phase Locking Tropical Atlantic Tropical Ocean Atmospheric Pressure Climatology Drought Earth Atmosphere Nickel Compounds Sea Level Tropics Rain Climate Conditions Climate Variation El Nino-southern Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Seasonal Variation Temperature Anomaly Temperature Gradient Amazonas Amazonia Atlantic Ocean Atlantic Ocean (tropical) Brasil Manaus Pacific Ocean Pacific Ocean (tropical) Para [brazil] Santarem [para] Andreoli, Rita Valéria Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| topic_facet |
Amazon Region Atlantic Basin Atmospheric Pattern Climate Condition Climate Variability Combined Effect Differential Factors Dry Seasons Eastern Amazons Eastern Tropical Pacific New Results Pacific Sector Precipitation Extremes Rainfall Anomaly Rainfall Data Rainy Seasons Sea Level Pressure Sea Surface Temperature (sst) Seasonal Differences Seasonal Phase Locking Tropical Atlantic Tropical Ocean Atmospheric Pressure Climatology Drought Earth Atmosphere Nickel Compounds Sea Level Tropics Rain Climate Conditions Climate Variation El Nino-southern Oscillation Precipitation (climatology) Rainfall Sea Level Pressure Sea Surface Temperature Seasonal Variation Temperature Anomaly Temperature Gradient Amazonas Amazonia Atlantic Ocean Atlantic Ocean (tropical) Brasil Manaus Pacific Ocean Pacific Ocean (tropical) Para [brazil] Santarem [para] |
| description |
Previous papers have shown that the rainfall anomalies over the Amazon region result from the independent or combined effects of the eastern tropical Pacific and Atlantic Basins. Here, the monthly rainfall data of Itaituba, Manaus, Parintins, and Santarém for the 1931-1996 period has been used to classify its dry and rainy seasons into dry, very dry, wet, and very wet categories. The sea surface temperature (SST) and sea level pressure (SLP) patterns associated with these climate conditions in the central and eastern Amazon are discussed in terms of the relative influence of the tropical Atlantic and Pacific sectors, as well as their seasonal differences. These seasonal differences are, in part, determined by the seasonal phase locking of the El Niño-Southern Oscillation (ENSO) and Atlantic equatorial modes. The rainy season cases are mostly driven by the ENSO and the inter-hemispheric SST gradient mode in the tropical Atlantic, and the dry season cases, by the Atlantic equatorial mode (AEM). A new result here is the role of the inter-Pacific-Atlantic anomalous SST gradient mode on the rainfall anomalies. This mode acts concordantly with the Atlantic modes on the rainfall over the central and eastern Amazon, and is responsible for precipitation extreme cases during the dry season and for the very wet rainy season case. In other words, the intense inter-Pacific-Atlantic mode for these cases is the differential factor in relation to the moderate cases. The results here, especially in relation to the role of the inter-Pacific-Atlantic gradient in the central and eastern Amazon precipitation, have not been discussed before and should be taken into consideration in the diagnostic activities. © 2011 Royal Meteorological Society. |
| format |
Artigo |
| author |
Andreoli, Rita Valéria |
| author2 |
Souza, Rodrigo Augusto Ferreira de Kayano, Mary Toshie Cândido, Luiz Antônio |
| author2Str |
Souza, Rodrigo Augusto Ferreira de Kayano, Mary Toshie Cândido, Luiz Antônio |
| title |
Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| title_short |
Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| title_full |
Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| title_fullStr |
Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| title_full_unstemmed |
Seasonal anomalous rainfall in the central and eastern Amazon and associated anomalous oceanic and atmospheric patterns |
| title_sort |
seasonal anomalous rainfall in the central and eastern amazon and associated anomalous oceanic and atmospheric patterns |
| publisher |
International Journal of Climatology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18025 |
| _version_ |
1787145083827519488 |
| score |
11.675608 |