@InProceedings{RamosCampMacaRosa:2006:SeChCo,
author = "Ramos, Fenando Manuel and Campanharo, Adriana S. L. O. and Macau,
Elbert Einstein Neher and Rosa, Reinaldo Roberto",
affiliation = "Instituto Nacional de Pesquisas Espaciais, Laborat{\'o}rio
Associado de Computa{\c{c}}{\~a}o e Matem{\'a}tica Aplicada
(INPE.LAC) and Instituto Nacional de Pesquisas Espaciais,
Laborat{\'o}rio Associado de Computa{\c{c}}{\~a}o e
Matem{\'a}tica Aplicada (INPE.LAC) and Instituto Nacional de
Pesquisas Espaciais, Laborat{\'o}rio Associado de
Computa{\c{c}}{\~a}o e Matem{\'a}tica Aplicada (INPE.LAC) and
Instituto Nacional de Pesquisas Espaciais, Laborat{\'o}rio
Associado de Computa{\c{c}}{\~a}o e Matem{\'a}tica Aplicada
(INPE.LAC)",
title = "Searching chaos and coherent structures in the atmospheric
turbulence above the Amazon forest",
booktitle = "Proceedings...",
year = "2006",
organization = "Experimental Chaos Conference, 9.",
abstract = "Amazonia is one of the last great tropical forest domains, the
largest hydrological system in the planet, and plays an important
role in the function of regional and global climates. Many aspects
of this fragile and highly complex system remain unclear for the
scientific community. A subject of great relevance for derstanding
how the Amazon terrestrial biosphere interacts with the atmosphere
is the correct modeling of the turbulent exchange of heat,
humidity, greenhouse gases, and other scalars at the vegetationair
interface. Here we investigate the possible chaotic nature of the
turbulence of the atmospheric boundary layer above the forest. For
this, we use fast-response (60 Hz) experimental temperature and
wind velocity data obtained during the wet-season campaign of the
large-scale biosphereatmosphere experiment in Amazonia (known as
the LBA project), carried out during the months of JanuaryMarch
1999, in the southwestern part of the Brazilian Amazonia. Our
results show that, under certain circumstances, large coherent
structures control turbulence dynamics at the forest canopy. In
this particular context, temperature data exhibit ramp-like
patterns whose dynamical properties are consistent with
deterministic chaos, and support the existence of a
low-dimensional chaotic attractor in the atmosphere, with
correlation dimension between 3 and 4, and the largest Lyapunov
exponent slightly positive.",
conference-location = "S{\~a}o Jos{\'e} dos Campos, SP",
conference-year = "29 may - 01 june",
copyholder = "SID/SCD",
isbn = "85-17-00025-0",
language = "en",
targetfile = "Searching chaos and coherent structures.pdf",
urlaccessdate = "16 jun. 2024"
}