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Impact on short-lived climate forcers increases projected warming due to deforestation
C E Scott1, S A Monks2,3, D V Spracklen4
1Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK. c.e.scott@leeds.ac.uk.
Nature Communications
|January 12, 2018
Summary
Global deforestation significantly impacts climate, influencing carbon dioxide, moisture, and surface albedo. Biogenic volatile organic compounds (BVOCs) from vegetation alter short-lived climate forcers (SLCFs), affecting global temperatures.
Area of Science:
- Climate science
- Biogeochemistry
- Atmospheric chemistry
Background:
- Deforestation influences climate through biogeochemical and biogeophysical processes.
- Vegetation emits biogenic volatile organic compounds (BVOCs) impacting short-lived climate forcers (SLCFs).
- SLCFs include aerosols, ozone, and methane, which are critical climate regulators.
Purpose of the Study:
- To quantify the climate impact of deforestation on radiative forcing (RF) from SLCFs.
- To assess the net radiative forcing from a complete global deforestation scenario.
- To compare the SLCF impact under a projected deforestation scenario (RCP8.5).
Main Methods:
- Utilizing climate modeling to simulate global deforestation scenarios.
- Quantifying radiative forcing from changes in CO2, surface albedo, and SLCFs.
- Analyzing the contributions of aerosol, ozone, and methane to the overall RF.
Main Results:
- Complete global deforestation results in a net positive RF of 0.12 W m⁻² from SLCFs.
- Decreases in ozone and methane partially offset positive aerosol RF, with SLCFs contributing 8% to total warming.
- Projected deforestation (RCP8.5) leads to zero net RF from SLCFs due to nonlinear aerosol indirect effects.
Conclusions:
- Deforestation's climate impact is complex, involving interactions between carbon, water, albedo, and SLCFs.
- SLCFs play a significant role in the climate response to deforestation, though their net effect can be nonlinear.
- Understanding these complex interactions is crucial for accurate climate change projections.
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