| Title: | Strong isoprene emission response to temperature in tundra vegetation |
| Author(s): | Seco R; Holst T; Davie-Martin CL; Simin T; Guenther A; Pirk N; Rinne J; Rinnan R; |
| Address: | "Terrestrial Ecology Section, Department of Biology, University of Copenhagen, DK-2100 Copenhagen O, Denmark. Center for Permafrost (CENPERM), University of Copenhagen, DK-1350 Copenhagen K, Denmark. Institute of Environmental Assessment and Water Research (IDAEA), CSIC, ES-08034 Barcelona, Catalonia, Spain. Department of Physical Geography and Ecosystem Science, Lund University, SE-22362 Lund, Sweden. Department of Earth System Science, University of California, Irvine, CA 92697. Department of Geosciences, University of Oslo, 0316 Oslo, Norway" |
| ISSN/ISBN: | 1091-6490 (Electronic) 0027-8424 (Print) 0027-8424 (Linking) |
| Abstract: | "Emissions of biogenic volatile organic compounds (BVOCs) are a crucial component of biosphere-atmosphere interactions. In northern latitudes, climate change is amplified by feedback processes in which BVOCs have a recognized, yet poorly quantified role, mainly due to a lack of measurements and concomitant modeling gaps. Hence, current Earth system models mostly rely on temperature responses measured on vegetation from lower latitudes, rendering their predictions highly uncertain. Here, we show how tundra isoprene emissions respond vigorously to temperature increases, compared to model results. Our unique dataset of direct eddy covariance ecosystem-level isoprene measurements in two contrasting ecosystems exhibited Q(10) (the factor by which the emission rate increases with a 10 degrees C rise in temperature) temperature coefficients of up to 20.8, that is, 3.5 times the Q(10) of 5.9 derived from the equivalent model calculations. Crude estimates using the observed temperature responses indicate that tundra vegetation could enhance their isoprene emissions by up to 41% (87%)-that is, 46% (55%) more than estimated by models-with a 2 degrees C (4 degrees C) warming. Our results demonstrate that tundra vegetation possesses the potential to substantially boost its isoprene emissions in response to future rising temperatures, at rates that exceed the current Earth system model predictions" |
| Keywords: | *Butadienes/analysis *Global Warming *Hemiterpenes/analysis *Plant Development Temperature *Tundra *Volatile Organic Compounds/analysis VOC emission modeling biogenic volatile organic compound fluxes biosphere-atmosphere interactions eddy covariance tempe; |
| Notes: | "MedlineSeco, Roger Holst, Thomas Davie-Martin, Cleo L Simin, Tihomir Guenther, Alex Pirk, Norbert Rinne, Janne Rinnan, Riikka eng Research Support, Non-U.S. Gov't 2022/09/13 Proc Natl Acad Sci U S A. 2022 Sep 20; 119(38):e2118014119. doi: 10.1073/pnas.2118014119. Epub 2022 Sep 12" |
