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  Response of the Amazon carbon balance to the 2010 drought derived with CarbonTracker South America

van der Laan-Luijkx, I. T., van der Velde, I. R., Krol, M. C., Gatti, L. V., Domingues, L. G., Correia, C. S. C., et al. (2015). Response of the Amazon carbon balance to the 2010 drought derived with CarbonTracker South America. Global Biogeochemical Cycles, 29(7), 1092-1108. doi:10.1002/2014GB005082.

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van der Laan-Luijkx, I. T.1, Autor
van der Velde, I. R.1, Autor
Krol, M. C.1, Autor
Gatti, L. V.1, Autor
Domingues, L. G.1, Autor
Correia, C. S. C.1, Autor
Miller, J. B.1, Autor
Gloor, M.1, Autor
van Leeuwen, T. T.1, Autor
Kaiser, J. W.2, Autor           
Wiedinmyer, C.1, Autor
Basu, S.1, Autor
Clerbaux, C.1, Autor
Peters, W.1, Autor
Affiliations:
1external, ou_persistent22              
2Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Zusammenfassung: Two major droughts in the past decade had large impacts on carbon exchange in the Amazon. Recent analysis of vertical profile measurements of atmospheric CO2 and CO by Gatti et al. (2014) suggests that the 2010 drought turned the normally close-to-neutral annual Amazon carbon balance into a substantial source of nearly 0.5 PgC/yr, revealing a strong drought response. In this study, we revisit this hypothesis and interpret not only the same CO2/CO vertical profile measurements but also additional constraints on carbon exchange such as satellite observations of CO, burned area, and fire hot spots. The results from our CarbonTracker South America data assimilation system suggest that carbon uptake by vegetation was indeed reduced in 2010 but that the magnitude of the decrease strongly depends on the estimated 2010 and 2011 biomass burning emissions. We have used fire products based on burned area (Global Fire Emissions Database version 4), satellite-observed CO columns (Infrared Atmospheric Sounding Interferometer), fire radiative power (Global Fire Assimilation System version 1), and fire hot spots (Fire Inventory from NCAR version 1), and found an increase in biomass burning emissions in 2010 compared to 2011 of 0.16 to 0.24 PgC/yr. We derived a decrease of biospheric uptake ranging from 0.08 to 0.26 PgC/yr, with the range determined from a set of alternative inversions using different biomass burning estimates. Our numerical analysis of the 2010 Amazon drought results in a total reduction of carbon uptake of 0.24 to 0.50 PgC/yr and turns the balance from carbon sink to source. Our findings support the suggestion that the hydrological cycle will be an important driver of future changes in Amazonian carbon exchange.

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 Datum: 2015
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: ISI: 000359810400011
DOI: 10.1002/2014GB005082
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Titel: Global Biogeochemical Cycles
  Andere : Glob. Biogeochem. Cycle
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, DC : American Geophysical Union
Seiten: - Band / Heft: 29 (7) Artikelnummer: - Start- / Endseite: 1092 - 1108 Identifikator: ISSN: 0886-6236
CoNE: https://pure.mpg.de/cone/journals/resource/954925553383