@MastersThesis{Barros:2008:AsObDe,
author = "Barros, Sheila Santana de",
title = "Precipita{\c{c}}{\~a}o no Centro de Lan{\c{c}}amento de
Alc{\^a}ntara: aspectos observacionais e de modelagem",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2008",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2008-05-29",
keywords = "precipita{\c{c}}{\~a}o, Centro de Lan{\c{c}}amento de
Alc{\^a}ntara (CLA), modelagem estat{\'{\i}}stica,
observa{\c{c}}{\~o}es, rainfall, Alcantara Rocket Lauching
Center (CLA), modeling, statistics, observation.",
abstract = "O Centro de Lan{\c{c}}amento de Alc{\^a}ntara (CLA; 2° 22S, 44º
23W) tem papel importante para as atividades aeroespaciais no
Brasil, sendo assim de interesse estudar os sistemas precipitantes
atuantes sobre a regi{\~a}o. O presente trabalho teve como
objetivo caracterizar estatisticamente a precipita{\c{c}}{\~a}o
no CLA usando dados hor{\'a}rios coletados de set/1993 a
mar/2007, caracterizar os sistemas e fatores associados aos
eventos de precipita{\c{c}}{\~a}o no CLA, e avaliar o desempenho
do modelo regional MM5 em simular os eventos de
precipita{\c{c}}{\~a}o de 2005 e 2006. Por meio da
caracteriza{\c{c}}{\~a}o estat{\'{\i}}stica, confirmou-se que
a esta{\c{c}}{\~a}o chuvosa (seca) esteve bem definida durante
os meses de mar{\c{c}}o e abril (setembro a novembro), quando a
precipita{\c{c}}{\~a}o apresentou seus maiores (menores)
{\'{\i}}ndices pluviom{\'e}tricos. Principalmente na
esta{\c{c}}{\~a}o chuvosa, grande parte dos eventos de chuva
apresenta pouco total acumulado, curta dura{\c{c}}{\~a}o e
pequena intensidade. Utilizando dados de Rean{\'a}lise,
radia{\c{c}}{\~a}o de onda longa emergente e temperatura de
brilho no canal infravermelho, tamb{\'e}m se definiram
crit{\'e}rios para identificar os sistemas meteorol{\'o}gicos de
grande, meso e de escala local associados aos eventos de
precipita{\c{c}}{\~a}o no CLA em 2005 e 2006. Os resultados
apontaram que 40% dos eventos de precipita{\c{c}}{\~a}o esteve
associada a fatores de grande escala, destacando-se a Zona de
Converg{\^e}ncia Intertropical. Verificou-se que 60% (40%) dos
eventos de precipita{\c{c}}{\~a}o ocorridos no CLA se deve a
processos estratiformes (convectivos). Em simula{\c{c}}{\~o}es
com o modelo MM5 para 2005 e 2006, os resultados mostraram que o
modelo superestima o total de precipita{\c{c}}{\~a}o mensal e o
n{\'u}mero de eventos durante todo o ano. ABSTRACT: The
Alc{\^a}ntara Rocket Launching Center (CLA; 2° 22S, 44º 23W)
plays an important role in aerospace research activities in
Brazil, and so it is of interest to study the precipitation
systems over the CLA region. This work aims at statistically
characterizing the precipitation in the CLA by using hourly
precipitation data collected from September 1993 to March 2007;
characterizing the systems and patterns associated to rainfall
events in the CLA; and evaluating the regional model MM5 skill in
simulating the rainfall events in 2005 and 2006. The statistical
characterization ratified that the rainy (dry) season was well
defined during March and April (September to November), when the
total monthly precipitation was maximum (minimum). Mainly in the
rainy season, the majority of rain events showed small amount of
total rainfall, short duration and light intensity. By using NCEP
reanalysis data, and outgoing longwave radiation and brightness
temperature data, the criteria to identify large, meso, and local
scale systems associated with precipitation over CLA in 2005 and
2006 were defined. The results showed that 40% of the
precipitation events were associated with large scale systems,
mainly the Intertropical Convergence Zone. About 60% (40%) of the
precipitation events over CLA are due to stratiform (convective)
processes. In simulations using the MM5 regional model for 2005
and 2006, the results showed that the model overestimated the
monthly precipitation amount and number of events all year
round.",
committee = "Fernandez, Julio Pablo Reyes (presidente) and Oyama, Marcos
Daisuke (orientador) and Angelis, Carlos Frederico de and Gandu,
Adilson Wagner",
copyholder = "SID/SCD",
englishtitle = "Rainfall at the Alc{\^a}ntara Rocket Lauching Center:
observational and modeling aspects",
language = "pt",
pages = "112",
ibi = "8JMKD3MGP8W/33END9S",
url = "http://urlib.net/ibi/8JMKD3MGP8W/33END9S",
targetfile = "publicacao.pdf",
urlaccessdate = "15 jun. 2024"
}