@Article{PaulinoJúniorVonRVonR:2017:AnBiMe,
author = "Paulino J{\'u}nior, Narciso and Von Randow, Rita de C{\'a}ssia
Silva and Von Randow, Celso",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Wageningen
University and Research Centre (WUR)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Analysis of biological and meteorological controls of
evapotranspiration in pristine forests and a pasture site in
Amazonia",
journal = "Ambiente e {\'A}gua",
year = "2017",
volume = "12",
number = "2",
pages = "179--191",
keywords = "Aerodynamic resistance, Decoupling factor, Stomatal resistance.",
abstract = "This work studied the behavior and seasonality of
evapotranspiration influenced by biotic and abiotic factors
through analysis of diurnal variation of aerodynamic resistance
(ra), stomatal resistance (rs) and decoupling factor (\Ω).
This index was proposed by Jarvis and McNaughton (1986) as an
indicative of the control of these resistances on the
evapotranspiration of vegetation. Selection of representative data
from wet and dry seasons from a primary forest in Central Amazonia
and a primary forest and a pasture sites in Southwestern Amazonia
had shown that: (i) ra is about 20 s.m-1 in both forests in both
seasons, and ranges from 70 to 100 s.m-1 in the pasture site; (ii)
rs varies both throughout the day and seasonally, with medians
increasing from 40 in the morning, to 150 s.m-1 in late afternoon,
in the wet season in the forests and from 50 to 160 s.m-1 in the
pasture. These values increase in the dry season, with the forests
rs ranging from 50 up to 500 s.m-1 and pasture rs starting from
140 s.m-1 and reaching up to more than 1800 s.m-1 in the dry
afternoons; (iii) \Ω ranges from 0.5 to 0.8 during the wet
season, and reduces to values below 0.5 in the afternoons during
the dry season, indicating that, although a strong influence of
net radiation in the evaporative loss is present, to a large
extent the evapotranspiration fluxes are coupled to the biotic
control of stomatal closure in the vegetation, especially in the
pasture and during dry periods.",
doi = "10.4136/ambi-agua.1832",
url = "http://dx.doi.org/10.4136/ambi-agua.1832",
issn = "1980-993X",
language = "en",
targetfile = "paulino_analysis.pdf",
urlaccessdate = "27 abr. 2024"
}