@Article{BakerRHABFGMMNRSSVW:2013:SuEcBe,
author = "Baker, Ian T. and Rocha, Humberto and Hutyra, Lucy R. and Araujo,
Alessandro Carioca and Borma, Laura S. and Freitas, Helber
Cust{\'o}dio and Goulden, Michael L. and Manzi, Antonio Ocimar
and Miller, Scott D. and Nobre, Antonio Donato and Restrepo-Coupe,
Natalia and Saleska, Scott R. and St{\"o}cklii, R. and Von
Randow, Celso and Wofsy, S. C.",
affiliation = "{} and {} and {} and {} and {} and {} and {} and {} and {} and {}
and {} and {} and {} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Surface ecophysiological behavior across vegetation and moisture
gradients in tropical South America",
journal = "Agricultural and Forest Meteorology",
year = "2013",
volume = "182-183",
pages = "177--188",
keywords = "carbon cycle, Amazon ecophysiology, surface-atmosphere exchange.",
abstract = "Surface ecophysiology at \five sites in tropical South
America across vegetation and moisture gradients is investigated.
From the moist northwest (Manaus) to the relatively dry southeast
(P´e de Gigante, state of Sao Paulo) simulated seasonal cycles of
latent and sensible heat, and carbon \flux produced with
the Simple Biosphere Model (SiB3) are confronted with
observational data. In the northwest, abundant moisture is
available, suggesting that the ecosystem is light-limited. In
these wettest regions, Bowen ratio is consistently low, with
little or no annual cycle. Carbon \flux shows little or no
annual cycle as well; e\fflux and uptake are determined by
high-frequency variability in light and moisture availability.
Moving downgradient in annual precipitation amount, dry season
length is more clearly de\fined. In these regions, a dry
season sink of carbon is observed and simulated. This sink is the
result of the combination of increased photosynthetic production
due to higher light levels, and decreased respiratory
e\fflux due to soil drying. The di\fferential
response time of photosynthetic and respiratory processes produce
observed annual cycles of net carbon \flux. In drier
regions, moisture and carbon \fluxes are in-phase; there is
carbon uptake during seasonal rains and e\fflux during the
dry season. At the driest site, there is also a large annual cycle
in latent and sensible heat \flux.",
doi = "10.1016/j.agrformet.2012.11.015",
url = "http://dx.doi.org/10.1016/j.agrformet.2012.11.015",
issn = "0168-1923",
label = "self-archiving-INPE-MCTI-GOV-BR",
language = "en",
targetfile = "Baker_etal_2013_finaldraft.pdf",
urlaccessdate = "04 maio 2024"
}