@MastersThesis{Costa:2018:CaObEs,
author = "Costa, Paulo Cesar Silva da",
title = "Precipita{\c{c}}{\~a}o no trimestre seco no Centro de
Lan{\c{c}}amento de Alc{\^a}ntara: caracteriza{\c{c}}{\~a}o
observacional e estudo de caso",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2018",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2018-08-21",
keywords = "centro de lan{\c{c}}amento de Alc{\^a}ntara, trimestre seco,
estudo de caso, sistema convectivo de mesoescala, modelo WRF, ALC,
dry quarter, case study, mesoscale convective complex - MCC, model
WRF.",
abstract = "As atividades aeroespaciais necessitam de uma meteorologia
favor{\'a}vel para a montagem e o lan{\c{c}}amento de foguetes.
Na esta{\c{c}}{\~a}o seca do CLA, h{\'a} eventos de chuva que
podem inviabilizar a opera{\c{c}}{\~a}o e danificar
equipamentos. O presente trabalho busca caracterizar o padr{\~a}o
do acumulado trimestral dos dias {\'u}midos (PWET) e do
n{\'u}mero de dias {\'u}midos (NWET) no CLA com base nos totais
di{\'a}rios de precipita{\c{c}}{\~a}o do CPC de 1979 a 2016 (37
anos). No aspecto observacional, verifica-se que o acumulado de
chuva no trimestre seco {\'e} inferior a 50 mm e,
predominantemente, as chuvas ocorrem em dias isolados. Os dias
{\'u}midos n{\~a}o ultrapassam, em m{\'e}dia, tr{\^e}s dias a
cada m{\^e}s. Os maiores volumes ocorrem pela manh{\~a} e os
menores no final da noite. Nos anos em que os acumulados de chuva
ficam acima da m{\'e}dia, ocorrem maior quantidade de dias com
chuva. As ocorr{\^e}ncia de PWET e NWET aumentam quando
associados {\`a} Gradiente negativo do Atl{\^a}ntico Sul (GRAD)
e {\`a} intensidade do vento abaixo da m{\'e}dia em 925 hPa. As
precipita{\c{c}}{\~o}es excedentes maior ou igual a 1 mm
ajusta-se {\`a} distribui{\c{c}}{\~a}o Log-normal e estabelece
que {\'e} prov{\'a}vel que 1 evento de precipita{\c{c}}{\~a}o
intensa ocorra a cada dois anos e que a precipita{\c{c}}{\~a}o
igual ou superior a 20 mm ocorra a cada cinco anos. Neste eventos,
a atmosfera apresenta uma circula{\c{c}}{\~a}o de grande escala
favor{\'a}vel, com converg{\^e}ncia de massa e de umidade em
baixos n{\'{\i}}veis, com correntes ascendentes e
concentra{\c{c}}{\~a}o de umidade em m{\'e}dios n{\'{\i}}veis
e com diverg{\^e}ncia de massa nos n{\'{\i}}veis superiores. O
evento, que ocorreu no dia 20/10/2011, apresentou padr{\~a}o de
grande escala com presen{\c{c}}a de v{\'a}rios transientes que
contrbu{\'{\i}}ram para o desenvolvimento do Sistema Convectivo
de Mesoescala. Ao final deste trabalho, a simula{\c{c}}{\~a}o do
caso foi realizada com o modelo WRF, mas suas sa{\'{\i}}das
subestimaram o desenvolvimento e deslocamento do SCM e a
intensidade da precipita{\c{c}}{\~a}o na regi{\~a}o do CLA.
ABSTRACT: Aerospace activities require a favorable meteorology for
assembling and launching rockets. In the CLA dry season, there are
rain events that can make operation unviable and damage equipment.
The present work aims to characterize the pattern of the quarterly
accumulation of wet days (PWET) and the number of wet days (NWET)
in the CLA based on daily CPC precipitation totals from 1979 to
2016 (37 years). In the observational aspect, it is verified that
the accumulated rainfall in the dry quarter is less than 50 mm
and, predominantly, rainfall occurs on isolated days. Wet days do
not exceed, on average, three days each month. The largest volumes
occur in the morning and the smallest in the evening. In the years
in which the accumulations of rain are above average, they occur
more amount of days with rain. The occurrence of PWET and NWET
increases when associated with the Southern Atlantic Negative
Gradient (GRAD) and below average wind intensity at 925 hPa.
Excess precipitation greater than or equal to 1 mm fits the
Log-normal distribution and establishes that it is likely that 1
event of intense precipitation occurs every two years and that
precipitation equal to or greater than 20 mm occurs every five
years. In this event, the atmosphere has a favorable largescale
circulation, with mass and humidity convergence at low levels,
with upward currents and humidity concentration at medium levels
and with mass divergence at higher levels. The event, which
occurred on October 20, 2011, presented a large scale pattern with
the presence of several transients that contributed to the
development of the Mesoscale Convective System. At the end of this
work, the simulation of the case was performed with the WRF model,
but its outputs underestimated the development and displacement of
the SCM and the intensity of precipitation in the CLA region.",
committee = "Sansigolo, Cl{\'o}vis Angeli (Presidente) and Oyama, Marcos
Daisuke (Orientador) and Eichholz, Cristiano Wickboldt and Brito,
Sheila Santana de Barros",
englishtitle = "Precipitation in the dry quarter in the Alc{\^a}nara Launch
Center: observational characterization and case study",
language = "pt",
pages = "80",
ibi = "8JMKD3MGP3W34R/3RMG4PS",
url = "http://urlib.net/ibi/8JMKD3MGP3W34R/3RMG4PS",
targetfile = "publicacao.pdf",
urlaccessdate = "25 abr. 2024"
}