The response of the regional longwave radiation balance and climate system in Europe to an idealized afforestation experiment
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Published:2023-02-27
Issue:1
Volume:14
Page:243-253
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ISSN:2190-4987
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Container-title:Earth System Dynamics
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language:en
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Short-container-title:Earth Syst. Dynam.
Author:
Breil Marcus, Krawczyk FelixORCID, Pinto Joaquim G.ORCID
Abstract
Abstract. Afforestation is an important mitigation strategy for climate change due to
its carbon sequestration potential. Besides this favorable biogeochemical
effect on global CO2 concentrations, afforestation also affects the
regional climate by changing the biogeophysical land surface
characteristics. In this study, we investigate the effects of an idealized
global CO2 reduction to pre-industrial conditions by a Europe-wide
afforestation experiment on the regional longwave radiation balance,
starting in the year 1986 on a continent entirely covered with grassland.
Results show that the impact of biogeophysical processes on the surface
temperatures is much stronger than that of biogeochemical processes. Furthermore,
biogeophysically induced changes of the surface temperatures, atmospheric
temperatures, and moisture concentrations are as important for the regional
longwave radiation balance as the global CO2 reduction. While the
outgoing longwave radiation is increased in winter, it is reduced in summer.
In terms of annual total, a Europe-wide afforestation has a regional warming effect
despite reduced CO2 concentrations. Thus, even for an idealized
reduction of the global CO2 concentrations to pre-industrial levels,
the European climate response to afforestation would still be dominated by
its biogeophysical effects.
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
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