@PhDThesis{Gonçalves:2022:EsCoAm,
author = "Gon{\c{c}}alves, Layrson de Jesus Menezes",
title = "Estudo das condi{\c{c}}{\~o}es ambientais aplicadas na
parametriza{\c{c}}{\~a}o de fra{\c{c}}{\~a}o de nuvens para
representar a intera{\c{c}}{\~a}o entre
nuvem-radia{\c{c}}{\~a}o",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2022",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2022-03-04",
keywords = "dados observacionais, modelagem clim{\'a}tica, fra{\c{c}}{\~a}o
de nuvem, intera{\c{c}}{\~a}o nuvem-radia{\c{c}}{\~a}o, BAM,
observational data, climate modeling, cloud fraction,
cloud-radiation interaction.",
abstract = "Este estudo teve como objetivo compreender as rela{\c{c}}{\~o}es
entre as vari{\'a}veis de larga escala (temperatura, omega e
umidade relativa) e fluxo de radia{\c{c}}{\~a}o de onda curta e
onda longa com a fra{\c{c}}{\~a}o de nuvem combinando dados de
modelagem de alta resolu{\c{c}}{\~a}o e dados observacionais,
visando o desenvolvimento de uma nova parametriza{\c{c}}{\~a}o
de fra{\c{c}}{\~a}o de nuvens para obter uma melhor
representa{\c{c}}{\~a}o da nebulosidade em um modelo
atmosf{\'e}rico global. Para isso, foi feito um estudo
observacional e de modelagem de alta resolu{\c{c}}{\~a}o,
utilizando um Cloud Resolving Model (CRM) chamado de System for
Atmospheric Modeling (SAM), com a finalidade de encontrar
rela{\c{c}}{\~o}es entre vari{\'a}veis atmosf{\'e}ricas que
pudessem ser usadas na nova parametriza{\c{c}}{\~a}o de
fra{\c{c}}{\~a}o de nuvem. Foi desenvolvida uma
parametriza{\c{c}}{\~a}o de fra{\c{c}}{\~a}o de nuvem baseada
na distribui{\c{c}}{\~a}o de Weibull aplicada nas vari{\'a}veis
progn{\'o}sticas de concentra{\c{c}}{\~a}o de {\'a}gua
l{\'{\i}}quida e gelo, que primeiramente, foi testada em um
modelo de intera{\c{c}}{\~a}o nuvem-radia{\c{c}}{\~a}o e por
fim implementada e avaliada no Brazilian Atmospheric Model (BAM),
em simula{\c{c}}{\~a}o clim{\'a}tica global para o
per{\'{\i}}odo de 1975 a 2010. Os resultados indicaram que as
anomalias, em rela{\c{c}}{\~a}o {\`a} m{\'e}dia do dia
anterior, de temperatura, umidade relativa e {\^o}mega, al{\'e}m
do conte{\'u}do de {\'a}gua, s{\~a}o vari{\'a}veis que podem
ser utilizadas na estimativa da fra{\c{c}}{\~a}o de nuvem. A
nova parametriza{\c{c}}{\~a}o de fra{\c{c}}{\~a}o de nuvem
desenvolvida neste trabalho mostrou um bom desempenho na
intera{\c{c}}{\~a}o com os fluxos de radia{\c{c}}{\~a}o de
onda curta e onda longa e as taxas de aquecimento para distintas
regi{\~o}es do planeta sob diferentes condi{\c{c}}{\~o}es
atmosf{\'e}ricas. A simula{\c{c}}{\~a}o clim{\'a}tica com BAM
utilizando a nova parametriza{\c{c}}{\~a}o de fra{\c{c}}{\~a}o
de nuvem desenvolvida neste trabalho, mostrou uma melhor
representa{\c{c}}{\~a}o da distribui{\c{c}}{\~a}o espacial da
nebulosidade e o seu impacto nos fluxos radiativos de onda longa e
onda curta na superf{\'{\i}}cie e topo da atmosfera, al{\'e}m
mostrar consist{\^e}ncia nos campos de precipita{\c{c}}{\~a}o e
de temperatura do ar a 2 metros. ABSTRACT: This study aimed to
understand the relationships between large-scale variables
(temperature, omega and relative humidity) and short-wave and
long-wave radiation flux with the cloud fraction by combining
high-resolution modeling data and observational data, aiming at
the development of a new cloud fraction parameterization to obtain
a better representation of cloudiness in a global atmospheric
model. For this, an observational and high-resolution modeling
study was carried out, using a Cloud Resolving Model (CRM) called
System for Atmospheric Modeling (SAM), in order to find
relationships between atmospheric variables that could be used in
the new parameterization of cloud fraction. A cloud fraction
parameterization was developed based on the Weibull distribution
applied to the prognostic variables of liquid water and ice
concentration, which was first tested in a cloud-radiation
interaction model and finally implemented and evaluated in the
Brazilian Atmospheric Model (BAM), in a global climate simulation
for the period from 1975 to 2010.The results indicated that the
anomalies, in relation to the average of the previous day, of
temperature, relative humidity and omega, in addition to the water
content, are variables that can be used in the estimation of the
cloud fraction. The new cloud fraction parameterization developed
in this work showed a good performance in the interaction with
shortwave and longwave radiation fluxes and heating rates for
different regions of the planet under different atmospheric
conditions. The climate simulation with BAM using the new cloud
fraction parameterization developed in this work, showed a better
representation of the spatial distribution of cloudiness and its
impact on long-wave and short-wave radiative fluxes at the surface
and top of the atmosphere, in addition to showing consistency in
the fields of precipitation and air temperature at 2 meters.",
committee = "Bottino, Marcus Jorge (presidente) and Kubota, Paulo Yoshio
(orientador) and Costa, Simone Marilene Sievert da (orientadora)
and Melo, Maria Luciene Dias de and Ros{\'a}rio, Nilton Manuel
{\'E}vora do",
englishtitle = "Study of environmental conditions applied in the parameterization
of cloud fraction to represent the cloud-radiation interaction",
language = "pt",
pages = "135",
ibi = "8JMKD3MGP3W34T/46EDAF8",
url = "http://urlib.net/ibi/8JMKD3MGP3W34T/46EDAF8",
targetfile = "publicacao.pdf",
urlaccessdate = "08 maio 2024"
}