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Biogeosciences An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/bg-2016-491
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-2016-491
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Submitted as: research article 15 Nov 2016

Submitted as: research article | 15 Nov 2016

Review status
This discussion paper is a preprint. It has been under review for the journal Biogeosciences (BG). The revised manuscript was not accepted.

Impact of annual and seasonal precipitation and air temperature on gross primary production in Mediterranean ecosystems in Europe

Svenja Bartsch1, Bertrand Guenet1, Christophe Boissard1, Juliette Lathière1, Jean-Yves Peterschmitt1, Annemiek Stegehuis1, Ilja-M. Reiter2, Thierry Gauquelin3, Virginie Baldy3, and Catherine Fernandez3 Svenja Bartsch et al.
  • 1Laboratoire des Sciences du Climat et de l’Environnement LSCE/IPSL, CEA-CNRS-OVSQ , Université Paris - Saclay, F-91191 Gif-sur-Yvette, France
  • 2Fédération de Recherche Ecosystèmes Continentaux et Risques Environnementaux CNRS FR3098 ECCOREV, Domaine du Petit Arbois Avenue Louis Philibert, Bâtiment du CEREGE - BP 80, 13545 Aix - en - Provencence Cedex 04, France
  • 3Aix Marseille Université, Avignon Université, CNRS, IRD, IMBE (Institut Méditerranéen de Biodiversité et d’Ecologie marine et continental) , 3 Place Victor Hugo, 13331 Marseille, France

Abstract. Mediterranean ecosystems are significant carbon sinks but are also particularly sensitive to climate change but the carbon dynamic in such ecosystem is still not fully understood. An improved understanding of the drivers of the carbon fixation by plants is needed to better predict how such ecosystems will respond to climate change. Here, for the first time, a large dataset collected through the FLUXNET network is used to estimate how the gross primary production (GPP) of different Mediterranean ecosystems was affected by air temperature and precipitation between the years 1996 and 2013. We showed that annual precipitation was not a significant driver of annual GPP. Our results also indicated that seasonal variations of air temperature significantly affected seasonal variations of GPP but without major impact on inter annual variations. Inter-annual variations of GPP seemed largely controlled by the precipitation during early spring (March–April), making this period crucial for the future of Mediterranean ecosystems. Finally, we also observed that the sensitivity of GPP in Mediterranean ecosystems to climate drivers is not ecosystem type dependent.

Svenja Bartsch et al.
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Svenja Bartsch et al.
Svenja Bartsch et al.
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Short summary
Mediterranean ecosystems are significant carbon sinks but the carbon dynamic in such ecosystem is still not fully understood. An improved understanding of the drivers of the carbon fixation by plants is needed to better predict how such ecosystems will respond to climate change. We showed that annual precipitation was not a significant driver of annual carbon fixation by plants.
Mediterranean ecosystems are significant carbon sinks but the carbon dynamic in such ecosystem...
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