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Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia

Each year, terrestrial ecosystems absorb more than a quarter of the anthropogenic carbon emissions, termed as land carbon sink. An exceptionally large land carbon sink anomaly was recorded in 2011, of which more than half was attributed to Australia. However, the persistence and spatially attributio...

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Autores principales: Ma, Xuanlong, Huete, Alfredo, Cleverly, James, Eamus, Derek, Chevallier, Frédéric, Joiner, Joanna, Poulter, Benjamin, Zhang, Yongguang, Guanter, Luis, Meyer, Wayne, Xie, Zunyi, Ponce-Campos, Guillermo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5123568/
https://www.ncbi.nlm.nih.gov/pubmed/27886216
http://dx.doi.org/10.1038/srep37747
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author Ma, Xuanlong
Huete, Alfredo
Cleverly, James
Eamus, Derek
Chevallier, Frédéric
Joiner, Joanna
Poulter, Benjamin
Zhang, Yongguang
Guanter, Luis
Meyer, Wayne
Xie, Zunyi
Ponce-Campos, Guillermo
author_facet Ma, Xuanlong
Huete, Alfredo
Cleverly, James
Eamus, Derek
Chevallier, Frédéric
Joiner, Joanna
Poulter, Benjamin
Zhang, Yongguang
Guanter, Luis
Meyer, Wayne
Xie, Zunyi
Ponce-Campos, Guillermo
author_sort Ma, Xuanlong
collection PubMed
description Each year, terrestrial ecosystems absorb more than a quarter of the anthropogenic carbon emissions, termed as land carbon sink. An exceptionally large land carbon sink anomaly was recorded in 2011, of which more than half was attributed to Australia. However, the persistence and spatially attribution of this carbon sink remain largely unknown. Here we conducted an observation-based study to characterize the Australian land carbon sink through the novel coupling of satellite retrievals of atmospheric CO(2) and photosynthesis and in-situ flux tower measures. We show the 2010–11 carbon sink was primarily ascribed to savannas and grasslands. When all biomes were normalized by rainfall, shrublands however, were most efficient in absorbing carbon. We found the 2010–11 net CO(2) uptake was highly transient with rapid dissipation through drought. The size of the 2010–11 carbon sink over Australia (0.97 Pg) was reduced to 0.48 Pg in 2011–12, and was nearly eliminated in 2012–13 (0.08 Pg). We further report evidence of an earlier 2000–01 large net CO(2) uptake, demonstrating a repetitive nature of this land carbon sink. Given a significant increasing trend in extreme wet year precipitation over Australia, we suggest that carbon sink episodes will exert greater future impacts on global carbon cycle.
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spelling pubmed-51235682016-12-07 Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia Ma, Xuanlong Huete, Alfredo Cleverly, James Eamus, Derek Chevallier, Frédéric Joiner, Joanna Poulter, Benjamin Zhang, Yongguang Guanter, Luis Meyer, Wayne Xie, Zunyi Ponce-Campos, Guillermo Sci Rep Article Each year, terrestrial ecosystems absorb more than a quarter of the anthropogenic carbon emissions, termed as land carbon sink. An exceptionally large land carbon sink anomaly was recorded in 2011, of which more than half was attributed to Australia. However, the persistence and spatially attribution of this carbon sink remain largely unknown. Here we conducted an observation-based study to characterize the Australian land carbon sink through the novel coupling of satellite retrievals of atmospheric CO(2) and photosynthesis and in-situ flux tower measures. We show the 2010–11 carbon sink was primarily ascribed to savannas and grasslands. When all biomes were normalized by rainfall, shrublands however, were most efficient in absorbing carbon. We found the 2010–11 net CO(2) uptake was highly transient with rapid dissipation through drought. The size of the 2010–11 carbon sink over Australia (0.97 Pg) was reduced to 0.48 Pg in 2011–12, and was nearly eliminated in 2012–13 (0.08 Pg). We further report evidence of an earlier 2000–01 large net CO(2) uptake, demonstrating a repetitive nature of this land carbon sink. Given a significant increasing trend in extreme wet year precipitation over Australia, we suggest that carbon sink episodes will exert greater future impacts on global carbon cycle. Nature Publishing Group 2016-11-25 /pmc/articles/PMC5123568/ /pubmed/27886216 http://dx.doi.org/10.1038/srep37747 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ma, Xuanlong
Huete, Alfredo
Cleverly, James
Eamus, Derek
Chevallier, Frédéric
Joiner, Joanna
Poulter, Benjamin
Zhang, Yongguang
Guanter, Luis
Meyer, Wayne
Xie, Zunyi
Ponce-Campos, Guillermo
Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title_full Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title_fullStr Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title_full_unstemmed Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title_short Drought rapidly diminishes the large net CO(2) uptake in 2011 over semi-arid Australia
title_sort drought rapidly diminishes the large net co(2) uptake in 2011 over semi-arid australia
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5123568/
https://www.ncbi.nlm.nih.gov/pubmed/27886216
http://dx.doi.org/10.1038/srep37747
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