@Article{CominAcevSouz:2016:SiNuAl,
author = "Comin, Alcimoni Nelci and Acevedo, Ot{\'a}vio Costa and Souza,
Ronald Buss de",
affiliation = "{Universidade Federal de Santa Maria (UFSM)} and {Universidade
Federal de Santa Maria (UFSM)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Simula{\c{c}}{\~a}o num{\'e}rica em alta resolu{\c{c}}{\~a}o
nas Ilhas Shetland do Sul, Ant{\'a}rtica, usando WRF",
journal = "Anu{\'a}rio do Instituto de Geoci{\^e}ncias",
year = "2016",
volume = "39",
number = "3",
pages = "105--110",
keywords = "WRF, alta resolu{\c{c}}{\~a}o, ilhas Shetland do Sul, Navio
Polar, WRF, High-resolution, South Shetland Islands, Polar Ship.",
abstract = "Este artigo apresenta simula{\c{c}}{\~o}es de alta
resolu{\c{c}}{\~a}o com o modelo Weather Research and
Forecasting (WRF) para a Ilhas Shetland do Sul, na Ant{\'a}rtica.
Os dados observados s{\~a}o coletadas pelos sensores instalados
no navio Polar durante o transecto nesta regi{\~a}o. Este estudo
incluiu quatro simula{\c{c}}{\~o}es diferentes; variando o
n{\'u}mero de pontos de grade no dom{\'{\i}}nio interno entre
127 x 127 e 187 x 187 e duas configura{\c{c}}{\~o}es de
microf{\'{\i}}sica. As simula{\c{c}}{\~o}es para a temperatura
do ar e ponto de orvalho s{\~a}o altamente dependente do
n{\'u}mero de pontos de grade do dom{\'{\i}}nio interno. Quando
o dom{\'{\i}}nio com 127 pontos {\'e} usado o modelo reproduz
flutua{\c{c}}{\~o}es abruptas dessas vari{\'a}veis e altas
subestimativas em ambas as configura{\c{c}}{\~o}es. Isto pode
ser atribu{\'{\i}}do {\`a} sensibilidade associada {\`a}
transfer{\^e}ncia de informa{\c{c}}{\~o}es entre as diferentes
grades aninhadas. Com a expans{\~a}o da grade interna em 187
pontos as flutua{\c{c}}{\~o}es deixam de ocorrer. A
subestimativa das temperaturas no modelo WRF tamb{\'e}m {\'e}
associada com a defici{\^e}ncia na representa{\c{c}}{\~a}o de
nebulosidade estratiforme. Nos dias com nebulosidade m{\'e}dia o
modelo simula melhor essas vari{\'a}veis. J{\'a} a press{\~a}o
{\'e} adequadamente simulada com os dois dom{\'{\i}}nios e
{\'e} mais dependente de padr{\~o}es clim{\'a}ticos de grande
escala derivadas do modelo global. As pequenas diferen{\c{c}}as
na press{\~a}o s{\~a}o devido ao ajuste din{\^a}mico do modelo.
O esquema microf{\'{\i}}sico WSM5 apresenta resultados melhores
que o WSM3 para todas as vari{\'a}veis testadas aqui. ABSTRACT:
This paper presents run high-resolution Weather Research and
Forecasting (WRF) model in the region of South Shetland Islands,
in Antarctica. Simulation model are compared to observations taken
aboard a Polar Ship during the transect in this region. A total of
4 different simulations were performed, varying the number of
points of the innermost domain 127 x 127 and 187 x 187 and two
microphysics schemes. The results of air temperature and dew point
are highly dependent on the size of the internal domain. When the
small domain with points 127 are used, the model produces abrupt
fluctuations of these variables and highly underestimates them in
both settings. This can be attributed the sensitivity of the model
to the transfer of information between the different nested grids.
With larger innermost grid with points 187, such fluctuations no
longer occur. The underestimation temperatures in the WRF model is
associated with the deficiency representation on days with
stratiform cloudiness. Days with middle-level clouds model the
temperature tend to be better represented. The air pressure is
adequately simulated with both domains, as it is more dependent on
large-scale weather patterns, derived from the global model, which
provides the boundary conditions. The small differences in air
pressure among the simulations are a consequence of the dynamical
adjustment of the model. The microphysics scheme WSM5 results were
better than scheme WSM3 for all variables tested here.",
issn = "0101-9759",
language = "en",
targetfile = "comin_simulacao.pdf",
urlaccessdate = "27 abr. 2024"
}