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- Peters, W. (author)
Seven years of recent European net terrestrial carbon dioxide exchange constrained by atmospheric observations
- Article/chapterEnglish2010
Publisher, publication year, extent ...
- Wiley,2010
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-48928
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-48928URI
- https://doi.org/10.1111/j.1365-2486.2009.02078.xDOI
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- Language:English
- Summary in:English
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- authorCount :41
- 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 (similar to 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.
Subject headings and genre
- atmospheric CO2
- carbon exchange
- data assimilation
- NATURAL SCIENCES
- NATURVETENSKAP
Added entries (persons, corporate bodies, meetings, titles ...)
- Krol, M. C. (author)
- van der Werf, G. R. (author)
- Houweling, S. (author)
- Jones, C. D. (author)
- Hughes, J. (author)
- Schaefer, K. (author)
- Masarie, K. A. (author)
- Jacobson, A. R. (author)
- Miller, J. B. (author)
- Cho, C. H. (author)
- Ramonet, M. (author)
- Schmidt, M. (author)
- Ciattaglia, L. (author)
- Apadula, F. (author)
- Helta, D. (author)
- Meinhardt, F. (author)
- di Sarra, A. G. (author)
- Piacentino, S. (author)
- Sferlazzo, D. (author)
- Aalto, T. (author)
- Hatakka, J. (author)
- Ström, JohanStockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)(Swepub:su)jstro (author)
- Haszpra, L. (author)
- Meijer, H. A. J. (author)
- van der Laan, S. (author)
- Neubert, R. E. M. (author)
- Jordan, A. (author)
- Rodo, X. (author)
- Morgui, J. -A (author)
- Vermeulen, A. T. (author)
- Popa, E. (author)
- Rozanski, K. (author)
- Zimnoch, M. (author)
- Manning, A. C. (author)
- Leuenberger, M. (author)
- Uglietti, C. (author)
- Dolman, A. J. (author)
- Ciais, P. (author)
- Heimann, M. (author)
- Tans, P. P. (author)
- Stockholms universitetInstitutionen för tillämpad miljövetenskap (ITM) (creator_code:org_t)
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- In:Global Change Biology: Wiley16:4, s. 1317-13371354-10131365-2486
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- Schaefer, K.
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- Ramonet, M.
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- Ciattaglia, L.
- Apadula, F.
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- Meinhardt, F.
- di Sarra, A. G.
- Piacentino, S.
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- Aalto, T.
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- Manning, A. C.
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