@MastersThesis{Silva:2010:VaSaAn,
author = "Silva, Marcelo Gomes da",
title = "Varia{\c{c}}{\~a}o sazonal e an{\'a}lise da influ{\^e}ncia de
par{\^a}metros ambientais na emiss{\~a}o de metano no Pantanal",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2010",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2010-05-31",
keywords = "metano, pantanal, par{\^a}metros ambientais, {\'a}rea alagada,
varia{\c{c}}{\~a}o sazonal, methane, pantanal, environmental
parameters, seasonal variation, wetland.",
abstract = "Este trabalho apresenta os resultados do estudo de par{\^a}metros
ambientais na emiss{\~a}o de metano na regi{\~a}o
Sul-Matogrossense do Pantanal. Foram realizadas duas campanhas,
sendo a primeira em setembro de 2009 e a segunda em mar{\c{c}}o
de 2010, correspondendo ao per{\'{\i}}odo de seca e cheia,
respectivamente. O fluxo de metano foi determinado pela
t{\'e}cnica de c{\'u}pula est{\'a}tica. Os par{\^a}metros
ambientais analisados foram a profundidade da coluna d{\'a}gua,
temperatura do ar e da {\'a}gua, pH, potencial de
oxirredu{\c{c}}{\~a}o, condutividade el{\'e}trica,
oxig{\^e}nio dissolvido e total de s{\'o}lidos dissolvidos.
Tamb{\'e}m foi medido o metano dissolvido em tr{\^e}s
profundidades (subsuperficial, meio e fundo). A m{\'e}dia geral
dos 151 fluxos v{\'a}lidos foi de 163,8 \$\pm\$ 343,2
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$, com uma mediana de 39,0
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$. Foram obtidos 67 fluxos
difusivos (m{\'e}dia de 15,9 \$\pm\$ 27,9 e mediana de 5,7
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$) e 84 fluxos ebulitivos
(m{\'e}dia de 281,9 \$\pm\$ 424,8
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$ e mediana de 119,2
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$). A exist{\^e}ncia de
influ{\^e}ncia dos par{\^a}metros ambientais na emiss{\~a}o de
metano foi investigada atrav{\'e}s da an{\'a}lise de componentes
principais. O fluxo difusivo mostrou correla{\c{c}}{\~a}o
significativa para pH, oxig{\^e}nio dissolvido e potencial de
oxirredu{\c{c}}{\~a}o. Para fluxos ebulitivos, as vari{\'a}veis
que apresentaram alguma diferen{\c{c}}a estat{\'{\i}}stica
foram a temperatura da {\'a}gua e do ar. O fluxo de metano
estimado pelo modelo de filme estagnado utilizando dados de metano
dissolvido subsuperficial foi comparado com o fluxo difusivo,
apresentando baixa correla{\c{c}}{\~a}o e mostrando que modelos
de emiss{\~a}o devem incorporar caracter{\'{\i}}sticas do
ambiente como as perturba{\c{c}}{\~o}es causadas por ventos e
correnteza. ABSTRACT: This work presents the results of the study
of environmental parameters on methane emission in southern Mato
Grosso, Pantanal. There were two campaigns, the first being in
September 2009 and the second in March 2010, corresponding to the
period of drought and flood, respectively. The flow of methane was
determined by the technique of static chamber. The environmental
parameters examined were the depth of the water column, air and
water temperature, pH, redox potential, electrical conductivity,
dissolved oxygen and total dissolved solids. The dissolved methane
at three depths (subsurface, middle and bottom) was also measured.
The overall average of 151 valid flows was 163.8 \$\pm\$ 343.2
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$, with a median of 39.0
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$. 67 diffusive fluxes (mean
15.9 \$\pm\$ 27.9 mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$ and a
median of 5.7 mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$) and 84 bubble
fluxes (mean 281.9 \$\pm\$ 424.8
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$ and a median of 119.2
mgCH\$_4\$m\$^{-2}\$d\$^{-1}\$) were obtained. The existence
of influence of environmental parameters on methane emission was
investigated by principal component analysis. The diffusive flux
showed a significant correlation for pH, dissolved oxygen and
redox potential. For bubble fluxes, the variables that showed some
statistical differences were the temperature of the water and air.
The flow of methane estimated by the stagnant film model using
data from subsurface dissolved methane was compared with the
diffusive flux, with low correlation and showing that emission
models should incorporate features of the environment such as the
disturbance caused by winds and currents.",
committee = "Muralikrisna, Polinaya (presidente) and Alval{\'a},
Pl{\'{\i}}nio Carlos (orientador) and Marani, Luciano
(orientador) and Gobbi, Delano and Pav{\~a}o, Hamilton Germano",
copyholder = "SID/SCD",
englishtitle = "Seasonal variation and analysis of the influence of environmental
parameters on the emission methane emission in Pantanal",
language = "pt",
pages = "106",
ibi = "8JMKD3MGP7W/37FH53S",
url = "http://urlib.net/ibi/8JMKD3MGP7W/37FH53S",
targetfile = "publicacao.pdf",
urlaccessdate = "27 abr. 2024"
}