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Latitudinal limits to the predicted increase of the peatland carbon sink with warming

Gallego-Sala, Angela V. and Charman, Dan J. and Brewer, Simon and Page, Susan E. and Prentice, I. Colin and Friedlingstein, Pierre and Moreton, Steve and Amesbury, Matthew J. and Beilman, David W. and Björck, Svante and Blyakharchuk, Tatiana and Bochicchio, Christopher and Booth, Robert K. and Bunbury, Joan and Camill, Philip and Carless, Donna and Chimner, Rodney A. and Clifford, Michael and Cressey, Elizabeth and Courtney-Mustaphi, Colin and De Vleeschouwer, François and de Jong, Rixt and Fialkiewicz-Koziel, Barbara and Finkelstein, Sarah A. and Garneau, Michelle and Githumbi, Esther and Hribjlan, John and Holmquist, James and Hughes, Paul D. M. and Jones, Chris and Jones, Miriam C. and Karofeld, Edgar and Klein, Eric S. and Kokfelt, Ulla and Korhola, Atte and Lacourse, Terri and Le Roux, Gaël and Lamentowicz, Mariusz and Large, David and Lavoie, Martin and Loisel, Julie and Mackay, Helen and MacDonald, Glen M. and Makila, Markku and Magnan, Gabriel and Marchant, Robert and Marcisz, Katarzyna and Martínez Cortizas, Antonio and Massa, Charly and Mathijssen, Paul and Mauquoy, Dmitri and Mighall, Timothy and Mitchell, Fraser J. G. and Moss, Patrick and Nichols, Jonathan and Oksanen, Pirita O. and Orme, Lisa and Packalen, Maara S. and Robinson, Stephen and Roland, Thomas P. and Sanderson, Nicole K. and Sannel, A. Britta K. and Silva-Sánchez, Noemí and Steinberg, Natascha and Swindles, Graeme T. and Turner, T. Edward and Uglow, Joanna and Väliranta, Minna and van Bellen, Simon and van der Linden, Marjolein and van Geel, Bas and Wang, Guoping and Yu, Zicheng and Zaragoza-Castells, Joana and Zhao, Yan Latitudinal limits to the predicted increase of the peatland carbon sink with warming. (2018) Nature Climate Change, 8 (10). 907-913. ISSN 1758-6798

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Official URL: https://doi.org/10.1038/s41558-018-0271-1

Abstract

The carbon sink potential of peatlands depends on the balance of carbon uptake by plants and microbial decomposition. The rates of both these processes will increase with warming but it remains unclear which will dominate the global peatland response. Here we examine the global relationship between peatland carbon accumulation rates during the last millennium and planetary-scale climate space. A positive relationship is found between carbon accumulation and cumulative photosynthetically active radiation during the growing season for mid- to high-latitude peatlands in both hemispheres. However, this relationship reverses at lower latitudes, suggesting that carbon accumulation is lower under the warmest climate regimes. Projections under Representative Concentration Pathway (RCP)2.6 and RCP8.5 scenarios indicate that the present-day global sink will increase slightly until around ad 2100 but decline thereafter. Peatlands will remain a carbon sink in the future, but their response to warming switches from a negative to a positive climate feedback (decreased carbon sink with warming) at the end of the twenty-first century.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Gael LE ROUX
Deposited On:04 Dec 2018 11:17

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