Faubert Patrick, Tiiva Päivi, Rinnan Åsmund, Michelsen Anders, Holopainen Jarmo K. et Rinnan Riikka. (2010). Doubled volatile organic compound emissions from subarctic tundra under simulated climate warming. New Phytologist, 187, (1), p. 199-208.
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URL officielle: http://dx.doi.org/doi:10.1111/j.1469-8137.2010.032...
Résumé
Biogenic volatile organic compound (BVOC) emissions from arctic ecosystems are important in view of their role in global atmospheric chemistry and unknown feedbacks to global warming. These cold ecosystems are hotspots of climate warming, which will be more severe here than averaged over the globe. We assess the effects of climatic warming on non‐methane BVOC emissions from a subarctic heath.
We performed ecosystem‐based chamber measurements and gas chromatography–mass spectrometry (GC‐MS) analyses of the BVOCs collected on adsorbent over two growing seasons at a wet subarctic tundra heath hosting a long‐term warming and mountain birch (Betula pubescens ssp. czerepanovii) litter addition experiment.
The relatively low emissions of monoterpenes and sesquiterpenes were doubled in response to an air temperature increment of only 1.9–2.5°C, while litter addition had a minor influence. BVOC emissions were seasonal, and warming combined with litter addition triggered emissions of specific compounds.
The unexpectedly high rate of release of BVOCs measured in this conservative warming scenario is far above the estimates produced by the current models, which underlines the importance of a focus on BVOC emissions during climate change. The observed changes have implications for ecological interactions and feedback effects on climate change via impacts on aerosol formation and indirect greenhouse effects.
Type de document: | Article publié dans une revue avec comité d'évaluation |
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ISSN: | 0028646X |
Volume: | 187 |
Numéro: | 1 |
Pages: | p. 199-208 |
Version évaluée par les pairs: | Oui |
Date: | 2010 |
Identifiant unique: | 10.1111/j.1469-8137.2010.03270.x |
Sujets: | Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie Sciences naturelles et génie > Sciences appliquées > Eau et environnement Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes Sciences naturelles et génie > Sciences naturelles > Chimie |
Département, module, service et unité de recherche: | Départements et modules > Département des sciences fondamentales |
Mots-clés: | climate warming, heath, litter, monoterpene, sesquiterpene, subarctic, tundra, volatile organic compound, réchauffement climatique, lande, litière, toundra, composé organique volatile |
Informations complémentaires: | Contact: Patrick1_Faubert@uqac.ca |
Déposé le: | 03 févr. 2021 17:49 |
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Dernière modification: | 03 févr. 2021 17:49 |
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