@ElectronicSource{BormaRCCKBFTOR-::CoEvHe,
abstract = "We describe hydrometeorological processes in a seasonal floodplain
area with savanna vegetation, near the Bananal Island region,
Brasil, within the transition zone of forest savanna in eastern
Amazonia. Measurements included climatological variables,
evapotranspiration and sensible heat flux, 3 m depth soil moisture
profile, groundwater and flood height. Continuous measurements of
eddy covariance over a 42 m tower and ground observations were
taken during November 2003 to December 2006. The increasing
evapotranspiration in the wet season and particularly in the flood
period showed how there the free surface water dominated the
energy exchanges. In opposition, evapotranspiration decreased,
despite the simultaneous increasing net radiation, air temperature
and water vapour deficit, that did not explain sufficiently the
losses of water to the atmosphere. On the other hand, the
turbulent mixing, the status of soil moisture, that depleted
substantially during the dry season, and adaptive mechanisms of
the vegetation contributted in larger extensions to limit
evapotranspiration. The vegetation over these floodplain forests
in Amazonia can erroneously be thought as ecosystems that have
abundant water availability. Despite the plenty of water in the
rainy season, the soil moisture status in the dry season showed
only a tiny memory of the floodtime. Strong drainage within very
permeable sandy soils helped to explain the depletioning. As long
as it is expected the savanna vegetation is adapted to such strong
seasonal oscilation, in anomalous dry years where the hydrological
pulse is weak, the response of the vegetation as a source for
evapotranspiration may be strongly affected in long dry spells.",
address = "S{\~a}o Jos{\'e} dos Campos",
affiliation = "{Universidade de S{\~a}o Paulo} and {Universidade de S{\~a}o
Paulo} and {Embrapa Meio Ambiente} and {Unitins Agro} and
{Universidade Federal do Tocantins} and {Universidade Federal do
Tocantins} and {Universidade de S{\~a}o Paulo} and {Universidade
de S{\~a}o Paulo} and {Universidade de S{\~a}o Paulo} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
author = "Borma, Laura De Simone and Rocha, Humberto Ribeiro da and Cabral,
Osvaldo Machado Rodrigues and Collicchio, Erich and Kurzatkowski,
Dariusz and Brugger, Paulo Jos{\'e} and Freitas, Helber
Cust{\'o}dio de and Tannus, Rafael and Oliveira, Leuda da Silva
and Renn{\'o}, Camilo Daleles and von-Randow, Celso",
keywords = "evapotranspiration, sensible heat flux, eddy covariance, soil
moisture, floodplain, savanna, Amazonia, Bananal Island.",
language = "en",
lastupdatedate = "2008-04-01",
publisher = "Instituto and Nacional and de and Pesquisas and Espaciais",
ibi = "sid.inpe.br/mtc-m17@80/2008/03.29.23.59",
url = "http://urlib.net/ibi/sid.inpe.br/mtc-m17@80/2008/03.29.23.59",
targetfile = "v1.pdf",
title = "Controls of the evaporation and heat flux over a floodplain forest
in the Bananal island region, Amazonia",
typeofmedium = "On-line",
urlaccessdate = "08 maio 2024"
}