@Article{BorgesSCSOMSSBPM:2020:SeVaSu,
author = "Borges, Camilla K. and Santos, Carlos A. C. dos and Carneiro,
Rayonil Gomes and Silva, Lindenberg L. da and Oliveira, Gabriel de
and Mariano, Denis and Silva, Madson T. and Silva, Bernardo B. da
and Bezerra, Bergson G. and Perez-Marin, Aldrin M. and Medeiros,
Salom{\~a}o de S.",
affiliation = "{Universidade Federal de Campina Grande (UFCG)} and {Universidade
Federal de Campina Grande (UFCG)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and carlos.santos@ufcg.edu.br and
{University of Toronto} and {Funda{\c{c}}{\~a}o Cearense de
Meteorologia e Recursos H{\'{\i}}drico (FUNCEME)} and
carlos.santos@ufcg.edu.br and carlos.santos@ufcg.edu.br and
{Universidade Federal do Rio Grande do Norte (UFRN)} and
{Instituto Nacional do Semi{\'a}rido (INSA)} and {Instituto
Nacional do Semi{\'a}rido (INSA)}",
title = "Seasonal variation of surface radiation and energy balances over
two contrasting areas of the seasonally dry tropical forest
(Caatinga) in the Brazilian semi-arid",
journal = "Environmental Monitoring and Assessment",
year = "2020",
volume = "192",
number = "8",
pages = "e524",
month = "Aug.",
keywords = "Semi-arid . Drought . Land degradation . Turbulent fluxes. Energy
balance closure.",
abstract = "Arid and semi-arid environments correspond to one-third of the
Earths terrestrial surface. In these environments, precipitation
is an essential and limiting element for vegetation growth and
ecosystem biomass productivity. The semi-arid region of Brazil
comprises around 11.5% of the national territory, where the
Caatinga biome originally composed ~ 76% of this area, with water
deficit as a prominent feature, annual rainfall lower than 800 mm,
temperatures ranging between 25 and 30 °C, and potential
evapotranspiration higher than 2000 mm/year. Research on the
dynamics of mass and heat fluxes through techniques such as eddy
covariance (EC) has contributed to estimate the magnitude and
seasonal patterns of turbulent exchanges between ecosystems and
the atmosphere. This study was conducted in an area of dense
Caatinga (DC) and another of sparse Caatinga (SC) from 2013 to
2014. It was observed that albedo (\α) and net radiation
(Rn) were higher in the SC compared with DC since the magnitude of
incoming shortwave radiation was higher in this area. It was found
that most of the Rn is converted to sensible heat flux (H), mainly
during the dry period in the SC, about 50% for H and 20% for
\λE. The energy balance closure showed that the turbulent
fluxes (H + \λE) were underestimated in comparison to the
available energy at the surface (Rn \− G). We also observed
that this discrepancy was higher in the DC area, corresponding to
~ 30%.",
doi = "10.1007/s10661-020-08484-y",
url = "http://dx.doi.org/10.1007/s10661-020-08484-y",
issn = "0167-6369",
language = "en",
targetfile = "Borges2020_Article_SeasonalVariationOfSurfaceRadi.pdf",
urlaccessdate = "27 abr. 2024"
}