Impact on short-lived climate forcers increases projected warming due to deforestation

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Scott , C E , Monks , S A , Spracklen , D V , Arnold , S R , Forster , P M , Rap , A , Äijälä , M , Artaxo , P , Carslaw , K S , Chipperfield , M P , Ehn , M , Gilardoni , S , Heikkinen , L , Kulmala , M , Petäjä , T , Reddington , C L S , Rizzo , L V , Swietlicki , E , Vignati , E & Wilson , C 2018 , ' Impact on short-lived climate forcers increases projected warming due to deforestation ' , Nature Communications , vol. 9 , 157 . https://doi.org/10.1038/s41467-017-02412-4

Title: Impact on short-lived climate forcers increases projected warming due to deforestation
Author: Scott, C. E.; Monks, S. A.; Spracklen, D. V.; Arnold, S. R.; Forster, P. M.; Rap, A.; Äijälä, M.; Artaxo, P.; Carslaw, K. S.; Chipperfield, M. P.; Ehn, M.; Gilardoni, S.; Heikkinen, L.; Kulmala, M.; Petäjä, T.; Reddington, C. L. S.; Rizzo, L. V.; Swietlicki, E.; Vignati, E.; Wilson, C.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2018-01-11
Language: eng
Number of pages: 9
Belongs to series: Nature Communications
ISSN: 2041-1723
URI: http://hdl.handle.net/10138/231558
Abstract: The climate impact of deforestation depends on the relative strength of several biogeochemical and biogeophysical effects. In addition to affecting the exchange of carbon dioxide (CO2) and moisture with the atmosphere and surface albedo, vegetation emits biogenic volatile organic compounds (BVOCs) that alter the formation of short-lived climate forcers (SLCFs), which include aerosol, ozone and methane. Here we show that a scenario of complete global deforestation results in a net positive radiative forcing (RF; 0.12Wm-2) from SLCFs, with the negative RF from decreases in ozone and methane concentrations partially offsetting the positive aerosol RF. Combining RFs due to CO2, surface albedo and SLCFs suggests that global deforestation could cause 0.8 K warming after 100 years, with SLCFs contributing 8% of the effect. However, deforestation as projected by the RCP8.5 scenario leads to zero net RF from SLCF, primarily due to nonlinearities in the aerosol indirect effect.
Subject: SECONDARY ORGANIC AEROSOL
CLOUD CONDENSATION NUCLEI
LAND-COVER CHANGE
GLOBAL CLIMATE
TROPOSPHERIC OZONE
ISOPRENE OXIDATION
SCALE DEFORESTATION
HISTORICAL CHANGES
MODEL SIMULATIONS
GREENHOUSE GASES
114 Physical sciences
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