Comparison of effective radiative forcing calculations using multiple methods, drivers, and models
File(s)
Author(s)
Type
Journal Article
Abstract
American Geophysical Union. All Rights Reserved. We compare six methods of estimating effective radiative forcing (ERF) using a set of atmosphere-ocean general circulation models. This is the first multiforcing agent, multimodel evaluation of ERF values calculated using different methods. We demonstrate that previously reported apparent consistency between the ERF values derived from fixed sea surface temperature simulations and linear regression holds for most climate forcings, excluding black carbon (BC). When land adjustment is accounted for, however, the fixed sea surface temperature ERF values are generally 10–30% larger than ERFs derived using linear regression across all forcing agents, with a much larger (~70–100%) discrepancy for BC. Except for BC, this difference can be largely reduced by either using radiative kernel techniques or by exponential regression. Responses of clouds and their effects on shortwave radiation show the strongest variability in all experiments, limiting the application of regression-based ERF in small forcing simulations.
Date Issued
2019-04-27
Date Acceptance
2019-03-26
Citation
Journal of Geophysical Research: Atmospheres, 2019, 124 (8), pp.4382-4394
ISSN
2169-897X
Publisher
American Geophysical Union
Start Page
4382
End Page
4394
Journal / Book Title
Journal of Geophysical Research: Atmospheres
Volume
124
Issue
8
Copyright Statement
© 2019 American Geophysical Union. An edited version of this paper was published by AGU. Tang, T., Shindell, D., Faluvegi, G., Myhre, G., Olivié, D., Voulgarakis, A., et al. ( 2019). Comparison of effective radiative forcing calculations using multiple methods, drivers, and models. Journal of Geophysical Research: Atmospheres, 124, 4382– 4394. https://doi.org/10.1029/2018JD030188. To view the published open abstract, go to: https://doi.org/10.1029/2018JD030188
Publication Status
Published
Date Publish Online
2019-04-02