Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations
We present an estimate of net ecosystem exchange (NEE) of CO2 in Europe for the years 2001-2007. It is derived with a data assimilation that uses a large set of atmospheric CO2 mole fraction observations (∼70 000) to guide relatively simple descriptions of terrestrial and oceanic net exchange, while...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/308621 2023-07-23T04:20:47+02:00 Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations Peters, W. Krol, M. C. van der Werf, G. R. Houweling, S. Jones, C. D. Hughes, J. Schaefer, K. Masarie, K. A. Jacobson, A. R. Miller, J. B. Cho, C. H. Ramonet, M. Schmidt, M. Ciattaglia, L. Apadula, F. Heltai, D. Meinhardt, F. di Sarra, A. G. Piacentino, S. Sferlazzo, D. Aalto, T. Hatakka, J. StröM, J. Haszpra, L. Meijer, H. A J van Der Laan, S. Neubert, R. E M Jordan, A. Rodó, X. Morguí, J. A. Vermeulen, A. T. Popa, Maria Elena Rozanski, K. Zimnoch, M. Manning, A. C. Leuenberger, M. Uglietti, C. Dolman, A. J. Ciais, P. Heimann, M. Tans, P. Sub Atmospheric physics and chemistry Dep Natuurkunde Subatomic Physics Institute 2010-04-01 application/pdf https://dspace.library.uu.nl/handle/1874/308621 en eng 1354-1013 https://dspace.library.uu.nl/handle/1874/308621 info:eu-repo/semantics/EmbargoedAccess Atmospheric CO Carbon exchange Data assimilation Ecology Global and Planetary Change Environmental Science(all) Environmental Chemistry Article 2010 ftunivutrecht 2023-07-02T01:14:44Z We present an estimate of net ecosystem exchange (NEE) of CO2 in Europe for the years 2001-2007. It is derived with a data assimilation that uses a large set of atmospheric CO2 mole fraction observations (∼70 000) to guide relatively simple descriptions of terrestrial and oceanic net exchange, while fossil fuel and fire emissions are prescribed. Weekly terrestrial sources and sinks are optimized (i.e., a flux inversion) for a set of 18 large ecosystems across Europe in which prescribed climate, weather, and surface characteristics introduce finer scale gradients. We find that the terrestrial biosphere in Europe absorbed a net average of -165 Tg C yr-1 over the period considered. This uptake is predominantly in non-EU countries, and is found in the northern coniferous (-94 Tg C yr-1) and mixed forests (-30 Tg C yr-1) as well as the forest/field complexes of eastern Europe (-85 Tg C yr-1). An optimistic uncertainty estimate derived using three biosphere models suggests the uptake to be in a range of -122 to -258 Tg C yr-1, while a more conservative estimate derived from the a-posteriori covariance estimates is -165±437 Tg C yr-1. Note, however, that uncertainties are hard to estimate given the nature of the system and are likely to be significantly larger than this. Interannual variability in NEE includes a reduction in uptake due to the 2003 drought followed by 3 years of more than average uptake. The largest anomaly of NEE occurred in 2005 concurrent with increased seasonal cycles of observed CO2. We speculate these changes to result from the strong negative phase of the North Atlantic Oscillation in 2005 that lead to favorable summer growth conditions, and altered horizontal and vertical mixing in the atmosphere. All our results are available through http://www.carbontracker.eu. © 2009 Blackwell Publishing Ltd. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Utrecht University Repository |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Atmospheric CO Carbon exchange Data assimilation Ecology Global and Planetary Change Environmental Science(all) Environmental Chemistry |
spellingShingle |
Atmospheric CO Carbon exchange Data assimilation Ecology Global and Planetary Change Environmental Science(all) Environmental Chemistry Peters, W. Krol, M. C. van der Werf, G. R. Houweling, S. Jones, C. D. Hughes, J. Schaefer, K. Masarie, K. A. Jacobson, A. R. Miller, J. B. Cho, C. H. Ramonet, M. Schmidt, M. Ciattaglia, L. Apadula, F. Heltai, D. Meinhardt, F. di Sarra, A. G. Piacentino, S. Sferlazzo, D. Aalto, T. Hatakka, J. StröM, J. Haszpra, L. Meijer, H. A J van Der Laan, S. Neubert, R. E M Jordan, A. Rodó, X. Morguí, J. A. Vermeulen, A. T. Popa, Maria Elena Rozanski, K. Zimnoch, M. Manning, A. C. Leuenberger, M. Uglietti, C. Dolman, A. J. Ciais, P. Heimann, M. Tans, P. Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
topic_facet |
Atmospheric CO Carbon exchange Data assimilation Ecology Global and Planetary Change Environmental Science(all) Environmental Chemistry |
description |
We present an estimate of net ecosystem exchange (NEE) of CO2 in Europe for the years 2001-2007. It is derived with a data assimilation that uses a large set of atmospheric CO2 mole fraction observations (∼70 000) to guide relatively simple descriptions of terrestrial and oceanic net exchange, while fossil fuel and fire emissions are prescribed. Weekly terrestrial sources and sinks are optimized (i.e., a flux inversion) for a set of 18 large ecosystems across Europe in which prescribed climate, weather, and surface characteristics introduce finer scale gradients. We find that the terrestrial biosphere in Europe absorbed a net average of -165 Tg C yr-1 over the period considered. This uptake is predominantly in non-EU countries, and is found in the northern coniferous (-94 Tg C yr-1) and mixed forests (-30 Tg C yr-1) as well as the forest/field complexes of eastern Europe (-85 Tg C yr-1). An optimistic uncertainty estimate derived using three biosphere models suggests the uptake to be in a range of -122 to -258 Tg C yr-1, while a more conservative estimate derived from the a-posteriori covariance estimates is -165±437 Tg C yr-1. Note, however, that uncertainties are hard to estimate given the nature of the system and are likely to be significantly larger than this. Interannual variability in NEE includes a reduction in uptake due to the 2003 drought followed by 3 years of more than average uptake. The largest anomaly of NEE occurred in 2005 concurrent with increased seasonal cycles of observed CO2. We speculate these changes to result from the strong negative phase of the North Atlantic Oscillation in 2005 that lead to favorable summer growth conditions, and altered horizontal and vertical mixing in the atmosphere. All our results are available through http://www.carbontracker.eu. © 2009 Blackwell Publishing Ltd. |
author2 |
Sub Atmospheric physics and chemistry Dep Natuurkunde Subatomic Physics Institute |
format |
Article in Journal/Newspaper |
author |
Peters, W. Krol, M. C. van der Werf, G. R. Houweling, S. Jones, C. D. Hughes, J. Schaefer, K. Masarie, K. A. Jacobson, A. R. Miller, J. B. Cho, C. H. Ramonet, M. Schmidt, M. Ciattaglia, L. Apadula, F. Heltai, D. Meinhardt, F. di Sarra, A. G. Piacentino, S. Sferlazzo, D. Aalto, T. Hatakka, J. StröM, J. Haszpra, L. Meijer, H. A J van Der Laan, S. Neubert, R. E M Jordan, A. Rodó, X. Morguí, J. A. Vermeulen, A. T. Popa, Maria Elena Rozanski, K. Zimnoch, M. Manning, A. C. Leuenberger, M. Uglietti, C. Dolman, A. J. Ciais, P. Heimann, M. Tans, P. |
author_facet |
Peters, W. Krol, M. C. van der Werf, G. R. Houweling, S. Jones, C. D. Hughes, J. Schaefer, K. Masarie, K. A. Jacobson, A. R. Miller, J. B. Cho, C. H. Ramonet, M. Schmidt, M. Ciattaglia, L. Apadula, F. Heltai, D. Meinhardt, F. di Sarra, A. G. Piacentino, S. Sferlazzo, D. Aalto, T. Hatakka, J. StröM, J. Haszpra, L. Meijer, H. A J van Der Laan, S. Neubert, R. E M Jordan, A. Rodó, X. Morguí, J. A. Vermeulen, A. T. Popa, Maria Elena Rozanski, K. Zimnoch, M. Manning, A. C. Leuenberger, M. Uglietti, C. Dolman, A. J. Ciais, P. Heimann, M. Tans, P. |
author_sort |
Peters, W. |
title |
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
title_short |
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
title_full |
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
title_fullStr |
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
title_full_unstemmed |
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations |
title_sort |
seven years of recent european net terrestrial carbon dioxide exchange constrained by atmospheric observations |
publishDate |
2010 |
url |
https://dspace.library.uu.nl/handle/1874/308621 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
1354-1013 https://dspace.library.uu.nl/handle/1874/308621 |
op_rights |
info:eu-repo/semantics/EmbargoedAccess |
_version_ |
1772185526602825728 |