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  Compensatory water effects link yearly global land CO2 sink changes to temperature

Jung, M., Reichstein, M., Schwalm, C. R., Huntingford, C., Sitch, S., Ahlström, A., et al. (2017). Compensatory water effects link yearly global land CO2 sink changes to temperature. Nature, 541(7638), 516-520. doi:10.1038/nature20780.

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 Urheber:
Jung, Martin1, Autor           
Reichstein, Markus2, Autor           
Schwalm, Christopher R., Autor
Huntingford, Chris, Autor
Sitch, Stephen, Autor
Ahlström, Anders, Autor
Arneth, Almut, Autor
Camps-Valls, Gustau, Autor
Ciais, Philippe, Autor
Friedlingstein, Pierre, Autor
Gans, Fabian2, Autor           
Ichii, Kazuhito, Autor
Jain, Atul K., Autor
Kato, Etsushi, Autor
Papale, Dario, Autor
Poulter, Ben, Autor
Raduly, Botond, Autor
Rödenbeck, Christian3, Autor           
Tramontana, Gianluca, Autor
Viovy, Nicolas, Autor
Wang, Ying-Ping, AutorWeber, Ulrich2, Autor           Zaehle, Sönke4, 5, Autor           Zeng, Ning, Autor mehr..
Affiliations:
1Global Diagnostic Modelling, Dr. Martin Jung, Department Biogeochemical Integration, Dr. M. Reichstein, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1938311              
2Department Biogeochemical Integration, Dr. M. Reichstein, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1688139              
3Inverse Data-driven Estimation, Dr. C. Rödenbeck, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497785              
4Terrestrial Biosphere Modelling, Dr. Sönke Zähle, Department Biogeochemical Integration, Dr. M. Reichstein, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1938309              
5Terrestrial Biosphere Modelling, Dr. Sönke Zähle, Department Biogeochemical Integration, Prof. Dr. Martin Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497787              

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Schlagwörter: Earth Observations; In-situ Observations; Essential Ecosystem Variables
 Zusammenfassung: Large interannual variations in the measured growth rate of atmospheric carbon dioxide (CO2) originate primarily from
fluctuations in carbon uptake by land ecosystems1–3. It remains
uncertain, however, to what extent temperature and water
availability control the carbon balance of land ecosystems across
spatial and temporal scales3–14. Here we use empirical models
based on eddy covariance data15 and process-based models16,17 to
investigate the effect of changes in temperature and water availability
on gross primary productivity (GPP), terrestrial ecosystem
respiration (TER) and net ecosystem exchange (NEE) at local
and global scales. We find that water availability is the dominant
driver of the local interannual variability in GPP and TER. To a
lesser extent this is true also for NEE at the local scale, but when
integrated globally, temporal NEE variability is mostly driven by
temperature fluctuations. We suggest that this apparent paradox can
be explained by two compensatory water effects. Temporal waterdriven
GPP and TER variations compensate locally, dampening
water-driven NEE variability. Spatial water availability anomalies
also compensate, leaving a dominant temperature signal in the yearto-
year fluctuations of the land carbon sink. These findings help to
reconcile seemingly contradictory reports regarding the importance
of temperature and water in controlling the interannual variability
of the terrestrial carbon balance3–6,9,11,12,14. Our study indicates that spatial climate covariation drives the global carbon cycle response.

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 Datum: 2016-11-072017-01-162017-01-26
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: Anderer: BGC2578
DOI: 10.1038/nature20780
 Art des Abschluß: -

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Projektinformation

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Projektname : BACI
Grant ID : 640176
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)

Quelle 1

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Titel: Nature
  Kurztitel : Nature
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 541 (7638) Artikelnummer: - Start- / Endseite: 516 - 520 Identifikator: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238