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Open AccessFeature PaperEditor’s ChoiceArticle

Expected Impacts of Mixing European Beech with Silver Fir on Regional Air Quality and Radiation Balance

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Chair of Tree Physiology, Institute of Forest Sciences, Albert-Ludwigs-Universität, 79110 Freiburg im Breisgau, Germany
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Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
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Chair of Environmental Meteorology, Albert-Ludwigs-Universität, 79085 Freiburg im Breisgau, Germany
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Chair of Forestry Economics and Forest Planning, Institute of Forest Sciences, Albert-Ludwigs-Universität, 79106 Freiburg im Breisgau, Germany
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Institute of Meteorology and Climate Research—Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen, Germany
*
Author to whom correspondence should be addressed.
Current Address: Ministerium für Umwelt, Energie, Ernährung und Forsten (MUEEF) Rheinland-Pfalz, 55116 Mainz, Germany.
Current Address: Regierungspräsidium Freiburg, Abteilung Umwelt, 79114 Freiburg, Germany.
Climate 2020, 8(10), 105; https://doi.org/10.3390/cli8100105
Received: 26 August 2020 / Revised: 24 September 2020 / Accepted: 24 September 2020 / Published: 26 September 2020
The anticipated climate change during the next decades is posing crucial challenges to ecosystems. In order to decrease the vulnerability of forests, introducing tree species’ mixtures are a viable strategy, with deep-rooting native Silver fir (Abies alba) being a primary candidate for admixture into current pure stands of European beech (Fagus sylvatica) especially in mountainous areas. Such a change in forest structure also has effects on the regional scale, which, however, have been seldomly quantified. Therefore, we measured and modeled radiative balance and air chemistry impacts of admixing Silver fir to European beech stands, including changes in biogenic volatile organic compound emissions. An increased fraction of Silver fir caused a smaller albedo and a (simulated) larger evapotranspiration, leading to a dryer and warmer forest. While isoprene emission was negligible for both species, sesquiterpene and monoterpene emissions were larger for fir than for beech. From these differences, we derived that ozone concentration as well as secondary organic aerosols and cloud condensation nuclei would increase regionally. Overall, we demonstrated that even a relatively mild scenario of tree species change will alter the energy balance and air quality in a way that could potentially influence the climate on a landscape scale. View Full-Text
Keywords: radiation budget; atmosphere-biosphere exchange; mixed forests; tropospheric ozone; BVOC emission; regional climate radiation budget; atmosphere-biosphere exchange; mixed forests; tropospheric ozone; BVOC emission; regional climate
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Bonn, B.; Kreuzwieser, J.; Magh, R.-K.; Rennenberg, H.; Schindler, D.; Sperlich, D.; Trautmann, R.; Yousefpour, R.; Grote, R. Expected Impacts of Mixing European Beech with Silver Fir on Regional Air Quality and Radiation Balance. Climate 2020, 8, 105.

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