Atmos. Chem. Phys. Discuss., 13, 18951-18967, 2013
www.atmos-chem-phys-discuss.net/13/18951/2013/
doi:10.5194/acpd-13-18951-2013
© Author(s) 2013. This work is distributed
under the Creative Commons Attribution 3.0 License.
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Technical Note: Evaluating a simple parameterization of radiative shortwave forcing from surface albedo change
R. M. Bright1 and M. M. Kvalevåg2
1Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway
2Center for International Climate and Environmental Research – Oslo (CICERO), Oslo, Norway

Abstract. Land use activities affect Earth's energy balance not only via biogeochemical emissions but also through perturbations in surface albedo, the latter of which is often excluded in impact assessment studies. In this short technical note, we present and compare a simple model for estimating shortwave radiative forcings at the top of Earth's atmosphere to a more sophisticated 8-stream radiative transfer model based on a discrete ordinate method. Outcomes from monthly albedo change simulations for ten globally distributed regions and a single year revealed that the simple model – based on a single exogenously supplied meteorological variable – performed quite well, having a sample correlation coefficient of 0.93 and a normalized root mean square error of 7.2%. Simple models like the one presented here can offer an attractive and efficient means for non-experts to begin including albedo change considerations in climate impact assessment studies enveloping land use activities.

Citation: Bright, R. M. and Kvalevåg, M. M.: Technical Note: Evaluating a simple parameterization of radiative shortwave forcing from surface albedo change, Atmos. Chem. Phys. Discuss., 13, 18951-18967, doi:10.5194/acpd-13-18951-2013, 2013.
 
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