Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Tytuł pozycji:

On the ability of a global atmospheric inversion to constrain variations of CO2 fluxes over Amazonia

Tytuł:
On the ability of a global atmospheric inversion to constrain variations of CO2 fluxes over Amazonia
Autorzy:
L. Molina
G. Broquet
P. Imbach
F. Chevallier
B. Poulter
D. Bonal
B. Burban
M. Ramonet
L. V. Gatti
S. C. Wofsy
J. W. Munger
E. Dlugokencky
P. Ciais
Temat:
Physics
QC1-999
Chemistry
QD1-999
Źródło:
Atmospheric Chemistry and Physics, Vol 15, Iss 14, Pp 8423-8438 (2015)
Wydawca:
Copernicus Publications, 2015.
Rok publikacji:
2015
Kolekcja:
LCC:Physics
LCC:Chemistry
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
1680-7316
1680-7324
Relacje:
http://www.atmos-chem-phys.net/15/8423/2015/acp-15-8423-2015.pdf; https://doaj.org/toc/1680-7316; https://doaj.org/toc/1680-7324
DOI:
10.5194/acp-15-8423-2015
Dostęp URL:
https://doaj.org/article/e72c473119364b5ebaf7439b91b86286  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.72c473119364b5ebaf7439b91b86286
Czasopismo naukowe
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 2002–2010. 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-than-usual 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.

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies