@Article{MolinaBICPBBRGWMDC:2015:AbGlAt,
author = "Molina, L. and Broquet, G. and Imbach, P. and Chevallier, F. and
Poulter, B. and Bonal, D. and Burban, B. and Ramonet, M. and
Gatti, Luciana Vanni and Wofsy, S. C. and Munger, J W and
Dlugokencky, E. and Ciais, P.",
affiliation = "{Laboratoire des Sciences du Climat et de l’Environnement} and
{Laboratoire des Sciences du Climat et de l’Environnement} and
{Tropical Agricultural Research and Higher Education Center} and
{Laboratoire des Sciences du Climat et de l’Environnement} and
{Montana State University} and INRA and {NOAA Earth System
Research Laboratory} and {Laboratoire des Sciences du Climat et de
l’Environnement} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {} and {} and {} and {Laboratoire des Sciences du
Climat et de l’Environnement}",
title = "On the ability of a global atmospheric inversion to constrain
variations of CO<sub>2</sub> fluxes over Amazonia",
journal = "Atmospheric Chemistry and Physics",
year = "2015",
volume = "15",
number = "14",
pages = "8423--8438",
keywords = "Balan{\c{c}}o de Carbono, Mudan{\c{c}}as Clim{\'a}ticas.",
abstract = "The exchanges of carbon, water and energy between the atmosphere
and the Amazon basin have global implications for the current and
future climate. Here, the global atmospheric inversion system of
the Monitoring of Atmospheric Composition and Climate (MACC)
service is used to study the seasonal and interannual variations
of biogenic CO2 fluxes in Amazonia during the period 20022010. The
system assimilated surface measurements of atmospheric CO2 mole
fractions made at more than 100 sites over the globe into an
atmospheric transport model. The present study adds measurements
from four surface stations located in tropical South America, a
region poorly covered by CO2 observations. The estimates of net
ecosystem exchange (NEE) optimized by the inversion are compared
to an independent estimate of NEE upscaled from eddy-covariance
flux measurements in Amazonia. They are also qualitatively
evaluated against reports on the seasonal and interannual
variations of the land sink in South America from the scientific
literature. We attempt at assessing the impact on NEE of the
strong droughts in 2005 and 2010 (due to severe and
longer-thanusual dry seasons) and the extreme rainfall conditions
registered in 2009. The spatial variations of the seasonal and
interannual variability of optimized NEE are also investigated.
While the inversion supports the assumption of strong spatial
heterogeneity of these variations, the results reveal critical
limitations of the coarse-resolution transport model, the surface
observation network in South America during the recent years and
the present knowledge of modelling uncertainties in South America
that prevent our inversion from capturing the seasonal patterns of
fluxes across Amazonia. However, some patterns from the inversion
seem consistent with the anomaly of moisture conditions in 2009.",
doi = "10.5194/acp-15-8423-2015",
url = "http://dx.doi.org/10.5194/acp-15-8423-2015",
issn = "1680-7316 and 1680-7324",
label = "lattes: 6983900937588878 9 MolinaBICPBBRGWMDC:2015:AbGlAt",
language = "en",
targetfile = "1_molina.pdf",
urlaccessdate = "27 abr. 2024"
}