@MastersThesis{Moura:2001:EsRaSo,
author = "Moura, Rildo Gon{\c{c}}alves de",
title = "Estudo das radia{\c{c}}{\~o}es solar e terrestre acima e dentro
de uma floresta tropical {\'u}mida",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2001",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2001-10-01",
keywords = "radia{\c{c}}{\~a}o solar, radia{\c{c}}{\~a}o terrestre,
floresta tropical, micrometeorologia, reserva biol{\'o}gica de
Jaru, solar radiation, terrestrial radiation, rain forests,
micrometeorology, Jaru biological reservation.",
abstract = "Em um experimento micrometeorol{\'o}gico realizado durante a
campanha WETAMC/LBA (de 26/01 a 10/03/1999) realizaram-se medidas
de radia{\c{c}}{\~a}o solar e terrestre em ambiente de floresta
tropical de terra firme na Reserva Biol{\'o}gica do Jaru- RO
(10º05' S; 61º56' W). Coletaram-se dados de fluxo incidente e
refletido de radia{\c{c}}{\~a}o de solar global usando
piran{\^o}metros, incidente e refletido, de radia{\c{c}}{\~a}o
fotossinteticamente ativa (RFA) usando sensores quantum, e do
balan{\c{c}}o de radia{\c{c}}{\~a}o usando-se
saldo-radi{\^o}metros, tanto no topo da torre
micrometeorol{\'o}gica como em 5 n{\'{\i}}veis (35, 30, 25, 15
e 2,5 metros) no interior da floresta. Os mesmos fluxos foram
obtidos utilizando-se um conjunto composto de doze
piran{\^o}metros, doze piran{\^o}metros (sensores quantum) e
oito saldo-radi{\^o}metros distribu{\'{\i}}dos ao redor da base
da torre. Coletaram-se tamb{\'e}m, as quatro componentes do
balan{\c{c}}o de radia{\c{c}}{\~a}o utilizando-se um
saldo-radi{\^o}metro (independente), apenas no topo da torre
micrometeorol{\'o}gica. Adicionalmente foram coletadas
informa{\c{c}}{\~o}es que dizem respeito ao {\'{\i}}ndice de
{\'a}rea foliar (IAF), utilizando-se um imageador digital de
dossel, marca/modelo CID-110 equipado com lente do tipo olho de
peixe de 8mm. Aproximadamente 50% da radia{\c{c}}{\~a}o
m{\'e}dia di{\'a}ria extra-terrestre foi observada no topo da
floresta, sendo esta composta de 46% de RFA e 54% de
radia{\c{c}}{\~a}o na faixa do infra-vermelho pr{\'o}ximo
(IVP). Os valores dos coeficientes de refletividade foram 13,7%,
3,6% e 22,0%, respectivamente, para radia{\c{c}}{\~a}o solar
(R\↓), RFA e IVP. A rela{\c{c}}{\~a}o entre o saldo de
Radia{\c{c}}{\~a}o Rn e R\↓ foi descrita adequadamente
pela express{\~a}o Rn = 0,852 R\↓ - 22,6 Wm-2. O fluxo de
radia{\c{c}}{\~a}o no ch{\~a}o da floresta representou apenas
3,5%, 1,9% e 2,8% dos respectivos fluxos no topo da floresta, para
R\↓, Rn e P\↓, respectivamente. A
composi{\c{c}}{\~a}o espectral da radia{\c{c}}{\~a}o solar no
ch{\~a}o da floresta {\'e} constitu{\'{\i}}da de 25% de RFA e
75% de IVP. O perfil de extin{\c{c}}{\~a}o de
radia{\c{c}}{\~a}o no interior da vegeta{\c{c}}{\~a}o pode ser
descrito de maneira an{\'a}loga {\`a} lei de Beer, sendo que a
camada superior da copa, entre 30 e 35 m de altura, {\'e} a parte
que mais absorve radia{\c{c}}{\~a}o solar e emite
radia{\c{c}}{\~a}o de onda longa. Os dias que predomina a
radia{\c{c}}{\~a}o difusa, a floresta pode ser considerada
homog{\^e}nea na distribui{\c{c}}{\~a}o de seus elementos e
apresenta um {\'{\I}}ndice de {\'A}rea Foliar m{\'e}dio de
aproximadamente 5,6 m2/m2. ABSTRACT: In a micrometeorological
experiment accomplished during the campaign WETAMC/LBA (from 26/01
to 10/03/1999) measurements of solar and terrestrial radiation
were made on a tropical forest environment, at Biological
Reservation of Jaru- RO (10º 05'S; 61º 56' W). Data of incident
and reflected solar global radiation flux were collected using
pyranometers, incident and reflected photosintetically active
radiation flux using quantum sensors and the radiation budget
using net radiometers, on a micrometeorological tower of 60
meters, in six levels (58, 35, 30, 25, 15 and 2,5 meters). Near
the forest ground was installed a set of radiometers composed of
twelve pyranometers, twelve quantum sensors and eight net
radiometers distributed around the base of the tower. Downward and
upward long wave radiation were collected by two pyrgeometers
(Kipp \& Zonen), just placed on the top of the
micrometeorological tower. Additionally, it was collected
information of leaf area index (LAI), using a Digital photographic
camera, model CID-110, equipped with lens of 8mm. Only 50% of
extraterrestrial radiation were observed at the level of forest
top, which was spectrally composed by 46% of PAR and 54% of near
infrared solar radiation (NIR). Calculated values for albedos of
solar radiation (R\↓), PAR and NIR were 13,7%, 3,6% e
22,0%, respectively. The relationship between net radiation, Rn,
and solar radiation, R\↓, was adequatelly described by the
expression Rn = 0.825 R\↓ - 22,6 Wm-2. Radiation flux near
the forest floor were only 3,5%, 1,9% e 2,8% of the forest top
radiation flux, respectively, for R\↓, Rn e P\↓. The
spectral composition of the solar radiation reaching the ground
was 25% of PAR and 75% of NIR. The extintion profile of radiation
inside the canopy could be described by an expression similar to
the Beers law. The upper layer of the canopy, between 30 and 35 m,
is the more effective in absorbing solar radiation and emmitting
long wave radiation. In dominant diffuse radiation conditions the
forest can be considered homogeneous for the distribution of its
vegetation elements, with a mean Leaf Area Index (LAI) of
approximately 5,6 m2/m2.",
committee = "S{\'a}, Leonardo Deane de Abreu (presidente) and Manzi, Antonio
Ocimar (orientador) and Alval{\'a}, Regina C{\'e}lia dos Santos
and Fisch, Gilberto Fernando and Andr{\'e}, Rom{\'{\i}}sio
Geraldo Bouhid",
copyholder = "SID/SCD",
englishtitle = "Solar and terrestrial radiation above and inside a tropical rain
forest",
language = "pt",
pages = "147",
ibi = "6qtX3pFwXQZGivnK2Y/RadHE",
url = "http://urlib.net/rep/6qtX3pFwXQZGivnK2Y/RadHE",
targetfile = "publicacao.pdf",
urlaccessdate = "09 dez. 2019"
}