@InProceedings{CalheirosGarcKayaMach:2009:AnTiPr,
author = "Calheiros, Alan James Peixoto and Garcia, S{\^a}mia Regina and
Kayano, Mary Toshie and Machado, Luiz Augusto Toledo",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "An{\'a}lise do tipo de precipita{\c{c}}{\~a}o no
in{\'{\i}}cio e fim da esta{\c{c}}{\~a}o chuvosa sobre a Bacia
Amaz{\^o}nica Central em 2007/2008",
year = "2009",
organization = "Simp{\'o}sio Internacional de Climatologia, 3.",
keywords = "esta{\c{c}}{\~a}o chuvosa, precipita{\c{c}}{\~a}o, TRMM.",
abstract = "O In{\'{\i}}cio e o Fim da Esta{\c{c}}{\~a}o Chuvosa (IEC e
FEC) de 2007 e 2008, respectivamente, s{\~a}o investigados na
regi{\~a}o da Bacia Amaz{\^o}nica Central (BAC) utilizando os
dados de Radia{\c{c}}{\~a}o de Onda Longa (ROL) e dados do
Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar
(PR). A determina{\c{c}}{\~a}o das datas de IEC e FEC foi
baseada no campo de ROL anti-sim{\'e}trico em rela{\c{c}}{\~a}o
ao equador \ROLant \. O campo de ant ROL
m{\'e}dio na BAC para o per{\'{\i}}odo de IEC de 2007 fornece
uma boa indica{\c{c}}{\~a}o de quando a esta{\c{c}}{\~a}o
chuvosa {\'e} estabelecida na regi{\~a}o. Entretanto, a data de
FEC de 2008 estimada da s{\'e}rie de ROLant {\'e} uma ou duas
p{\^e}ntadas antes da data quando a precipita{\c{c}}{\~a}o
{\'e} ausente na regi{\~a}o da BAC. Com os dados do TRMM/PR foi
poss{\'{\i}}vel analisar o tipo de precipita{\c{c}}{\~a}o
associado ao IEC e FEC sobre a regi{\~a}o e avaliar o
per{\'{\i}}odo de transi{\c{c}}{\~a}o. Notou-se, assim, que a
precipita{\c{c}}{\~a}o estratiforme tem grande influ{\^e}ncia
no FEC. ABSTRACT: Onset and demise of the rainy season (ONR and
DER) of 2007 and 2008, respectively, are investigated over the
Central Amazon Basin (CAM) using outgoing longwave radiation (OLR)
data and TRMM/PR (Tropical Rainfall Measuring Mission
Precipitation Radar). The determination of these dates was based
on the antisymmetric in relation to the equator outgoing longwave
radiation \AOLR\. The spatial average of AOLR
over the CAM for the ONR of 2007 gives a reasonable indication of
when the rainy season is established in the region. However, the
DER date estimated from the AOLR time series for 2008 is one to
two pentads before the date when rainfall is absent in the CAM
region. With the TRMM/PR data, it was possible to analyze the type
of precipitation associated to ONR and DER over the area and to
assess the transition period. Thus, it was noted that the
stratiform precipitation has influence on the FEC.",
conference-location = "Canela, RS",
conference-year = "18-21 out.",
language = "pt",
targetfile = "SIC3_calheiros et al.pdf",
urlaccessdate = "27 jun. 2024"
}