@PhDThesis{Reuter:2013:SeMoMM,
author = "Reuter, Elizabeth Diane de Jesus",
title = "Sensibilidade do modelo MM5 no progn{\'o}stico do vento {\`a}s
diferentes parametriza{\c{c}}{\~o}es de Camada Limite
Planet{\'a}ria no Centro de Lan{\c{c}}amento de Alc{\^a}ntara",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2013",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2013-03-28",
keywords = "Centro de Lan{\c{c}}amento de Alc{\^a}ntara(CLA),
parametriza{\c{c}}{\~o}es de PBL, MM5, Alcantara Launch Center
(ALC), parameterizations of PBL, MM5.",
abstract = "O regime de vento e as condi{\c{c}}{\~o}es da Camada Limite
Planet{\'a}ria (PBL) no Centro de Lan{\c{c}}amento de
Alc{\^a}ntara (CLA) s{\~a}o estudados a fim de propor um melhor
desempenho da previs{\~a}o do vento. Os resultados observacionais
obtidos neste estudo estiveram de acordo com os estudos
observacionais anteriores da regi{\~a}o do CLA. A sensibilidade
das simula{\c{c}}{\~o}es para ajustes de
parametriza{\c{c}}{\~o}es da PBL {\'e} investigada usando a
quinta gera{\c{c}}{\~a}o Pennsylvania State University-NCAR
Modelo de Mesoescala (MM5). Tr{\^e}s parametriza{\c{c}}{\~o}es
de camada limite utilizadas, al{\'e}m da
parametriza{\c{c}}{\~a}o de refer{\^e}ncia, foram selecionadas
para avalia{\c{c}}{\~a}o, das quais duas [esquemas de Blackadar
(BLK) e Previs{\~a}o de M{\'e}dio Alcance (MRF)] s{\~a}o
esquemas simples de primeira ordem e n{\~a}o locais, ETA e BT que
s{\~a}o esquemas de ordem de fechamento de 1,5 e 2,
respectivamente e difus{\~a}o vertical local. Os dados utilizados
foram dos experimentos ocorridos durante os per{\'{\i}}odos seco
(Murici2008) e chuvoso (GPM2010) no CLA, no Maranh{\~a}o. As
compara{\c{c}}{\~o}es s{\~a}o feitas entre as m{\'e}dias das
componentes zonal e meridional do vento observadas e simuladas. Os
esquemas de MRF e BLK produziram melhores resultados que aqueles
de ETA e BT. Apesar disso, MRF e BLK subestimam em torno de 16\%
no per{\'{\i}}odo chuvoso e o superestimam em m{\'e}dia 18\%
no per{\'{\i}}odo seco as componentes zonal e meridional. Os
resultados sugerem uma pequena melhoria na precis{\~a}o geral das
previs{\~o}es a partir dos ajustes de velocidade de
fric{\c{c}}{\~a}o e comprimento de rugosidade
climatol{\'o}gicos do CLA, implementados nas
parametriza{\c{c}}{\~o}es de MRF e BLK, respectivamente.
Efetivamente, houve uma melhora na previs{\~a}o do vento no CLA
para o per{\'{\i}}odo chuvoso. Em contrapartida, para o
per{\'{\i}}odo seco os ajustes propostos ainda n{\~a}o foram
bem definidos em termos de ganho, sendo necess{\'a}rios novos
ajustes nas parametriza{\c{c}}{\~o}es MRF ou BLK combinado
{\`a}s outras op{\c{c}}{\~o}es f{\'{\i}}sicas, principalmente
de radia{\c{c}}{\~a}o, do modelo MM5. ABSTRACT: The wind regime
and conditions of the Planetary Boundary Layer (PBL) in
Alc{\^a}ntara Launch Center (ALC) are studied in order to offer
better performance in wind forecasting. The observational results
obtained in this study were in agreement with previous
observational studies of the CLA. The sensitivity of simulations
to changes in the planetary boundary layer (PBL) parameterization
is investigated using the modified fifth generation Pennsylvania
State University-NCAR Mesoscale Model (MM5) and observations from
two field campaigns in distinct periods. Three boundary layer
parameterizations, in addition to the current parameterization,
were selected for evaluation, of which two (Blackadar (BLK) and
Medium Range Forecast (MRF) schemes) are simple non-local first
order schemes, ETA and BT are schemes of closure order 1.5 and 2,
respectively, and local vertical diffusion. The data are from two
experiments which occurred during the dry (Murici2008) and wet
(GPM2010) seasons at the ALC, in Maranh{\~a}o. The comparisons
are made among the means of the zonal and meridional components of
observed and simulated winds. The MRF and BLK schemes produced
better results than the ETA and BT schemes. Nevertheless, MRF and
BLK underestimate the zonal and meridional wind components by
around 16\% in the rainy season and overestimate them by on
average 18\% in the dry season. The results suggest that there is
a small improvement in the general accuracy of the predictions
with the adjustments of friction velocity and climatological
roughness of the ALC implemented in the MRF and BLK
parameterizations, respectively. Effectively, there was an
improvement in the wind prediction at the ALC for the rainy
season. On the other hand, for the dry season, gains from the
changes proposed in this work were not clear, and new adjustments
in the MRF or BLK parameterizations combined with other physics
options, principally radiation, are needed in the MM5 model.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
committee = "Chan, Chou Sin (presidente) and Fisch, Gilberto Fernando
(orientador) and Oyama, Marcos Daisuke and Correa, Cleber de Souza
and Pellegrini, Claudio de Castro",
copyholder = "SID/SCD",
englishtitle = "Sensitivity of wind forecasts with the MM5 model to different
Planetary Boundary Layer parametrizations at the Alc{\^a}ntara
Launch Center",
language = "pt",
pages = "220",
ibi = "8JMKD3MGP7W/3DMA8UH",
url = "http://urlib.net/ibi/8JMKD3MGP7W/3DMA8UH",
targetfile = "publicacao.pdf",
urlaccessdate = "07 maio 2024"
}