@Article{AlvalaGRFLMVDCW:2002:InSeVa,
author = "Alvala, Regina C{\'e}lia S. and Gielow, Ralf and Rocha and R., H.
and da and Freitas, H. C. and Lopes, J. M. and Manzi, Antonio
Ocimar and Von Randow, Celso and Dias, Maria Assun{\c{c}}{\~a}o
Faus da Silva and Cabral, O. M. R. and Waterloo, M. J.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)} and
{Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)} and
Instituto de Geof{\'{\i}}sica, Astronomia e Ci{\^e}ncias da
Atmosfera, Universidade de S{\~a}o Paulo and Instituto de
Geof{\'{\i}}sica, Astronomia e Ci{\^e}ncias da Atmosfera,
Universidade de S{\~a}o Paulo and Instituto de
Geof{\'{\i}}sica, Astronomia e Ci{\^e}ncias da Atmosfera,
Universidade de S{\~a}o Paulo and {Instituto Nacional de
Pesquisas Espaciais (INPE/CPTEC)} and {Instituto Nacional de
Pesquisas Espaciais (INPE/CPTEC)} and Instituto de
Geof{\'{\i}}sica, Astronomia e Ci{\^e}ncias da Atmosfera,
Universidade de S{\~a}o Paulo and Centro Nacional de Pesquisas do
Meio Ambiente, Empresa Brasileira de Pesquisa Agropecu{\'a}ria,
Jaguari{\'u}na, SP and Vrije Universiteit Amsterdam, Amsterdam,
Netherlands",
title = "Intradiurnal and seasonal variability of soil temperature, heat
flux, soil moisture content, and thermal properties under forest
and pasture in Rondonia",
journal = "Revista Brasileira de Geof{\'{\i}}sica",
year = "2002",
volume = "107",
number = "D 20",
pages = "Art. No. 8043",
month = "aug.",
keywords = "soil temperature, soil heat flux, soil moisture content, soil
thermal properties, soil thermal diffusivity, Amazon.",
abstract = "Soil temperatures depend on the soil heat flux, an important
parameter in meteorological and plant growth-energy balance
models. Thus, they were measured, together with soil moisture
contents, within the LBA program at forest (Reserva Jaru) and
pasture (Fazenda Nossa Senhora) sites in Rondonia, Brazilian
Amazonia during wet (February) and dry (August) periods of 1999.
The wet period showed maxima of the heat flux into the soil around
five to six times smaller at the forest than at the pasture,
except for some spikes that are related to stronger solar forcing,
such as those due to sunspecks in the forest. This pattern
remained during the dry period, but with doubled maximum values.
Also, the soil heat flux and the soil temperatures responded very
significantly to the passage of cold fronts in both periods at
both sites. Temperature profiles measured in the 0.10-0.40 m soil
layer showed daily averages and ranges smaller at the forest than
at the pasture. The daily average of the soil moisture content in
the same layer, during the wet season, increased with depth at
both sites, with consistently lower values at the forest. However,
their ranges were smaller at the pasture, except for the 0.40 m
depth. During the dry period, these ranges were much higher at the
pasture, but with nearer average values. Finally, the computed
daily apparent soil thermal diffusivities, volumetric heat
contents, and thermal conductivities are presented, with the first
ones crossed with the measured soil moisture content.",
copyholder = "SID/SCD",
doi = "10.1029/2001JD000599",
url = "http://dx.doi.org/10.1029/2001JD000599",
issn = "0102-261X",
language = "en",
targetfile = "memoria.pdf",
urlaccessdate = "16 jun. 2024"
}