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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
21/06/2016 |
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Data da última atualização: |
21/06/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
RODRIGUES, M. L. G.; YNOUE, R. Y. |
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Título: |
Mesoscale and synoptic environment in three orographically-enhanced rain events on the coast of Santa Catarina (Brazil). |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Weather and Forecasting, Boston, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
In this study three cases of extreme rainfall events are analyzed in Florianopolis, on the
Santa Catarina coast, lying between the mountains and the South Atlantic Ocean in
southeastern South America. The largest totals - 200-300 mm in 12-24 hours - resulted
in flash floods. ECMWF 6-hourly 1.5° x 1.5° data were used to determine synoptic
fields and quasi-geostrophic forcing, and observational data from local networks, for
subsynoptic analysis. In case C1, in May 2010, there was a frontal passage. In C2 and
C3, January 2008 and February 1979, the coastline separated a ridge over the
continent from a trough over the sea at the surface, with an atmosphere of low
baroclinicity predominating at 500 hPa. All three events were characterized by postfrontal
conditions, the presence of a anticyclone over the sea, centered at 35-40 °S,
and slow-moving or quasi-stationary mid-level cyclones over the continent, at 27 °S.
The circulation generated in the cyclone resulted in strong (10 m s-1) and persistent
low-level east-northeast winds on the coast of SC, favoring the influx of heat and
humidity on the day of heavy rain. The upward motion at 850 hPa was concentrated
over the affected areas and stronger than that at 500 hPa. Even so, the moist air that
reached the mountain in a conditionally unstable environment, rose only to middle
levels. The features presented were similar to those observed in events of orographic
rain in Europe and the USA. |
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Palavras-Chave: |
Chuva extrema; litoral Santa Catarina; orografia. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01993naa a2200169 a 4500
001 1125129
005 2016-06-21
008 2016 bl uuuu u00u1 u #d
100 1 $aRODRIGUES, M. L. G.
245 $aMesoscale and synoptic environment in three orographically-enhanced rain events on the coast of Santa Catarina (Brazil).$h[electronic resource]
260 $c2016
520 $aIn this study three cases of extreme rainfall events are analyzed in Florianopolis, on the Santa Catarina coast, lying between the mountains and the South Atlantic Ocean in southeastern South America. The largest totals - 200-300 mm in 12-24 hours - resulted in flash floods. ECMWF 6-hourly 1.5° x 1.5° data were used to determine synoptic fields and quasi-geostrophic forcing, and observational data from local networks, for subsynoptic analysis. In case C1, in May 2010, there was a frontal passage. In C2 and C3, January 2008 and February 1979, the coastline separated a ridge over the continent from a trough over the sea at the surface, with an atmosphere of low baroclinicity predominating at 500 hPa. All three events were characterized by postfrontal conditions, the presence of a anticyclone over the sea, centered at 35-40 °S, and slow-moving or quasi-stationary mid-level cyclones over the continent, at 27 °S. The circulation generated in the cyclone resulted in strong (10 m s-1) and persistent low-level east-northeast winds on the coast of SC, favoring the influx of heat and humidity on the day of heavy rain. The upward motion at 850 hPa was concentrated over the affected areas and stronger than that at 500 hPa. Even so, the moist air that reached the mountain in a conditionally unstable environment, rose only to middle levels. The features presented were similar to those observed in events of orographic rain in Europe and the USA.
653 $aChuva extrema
653 $alitoral Santa Catarina
653 $aorografia
700 1 $aYNOUE, R. Y.
773 $tWeather and Forecasting, Boston, 2016.
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