Radiative forcing by long-lived greenhouse gases:Calculations with the AER radiative transfer models

Iacono, Michael J., Delamere, Jennifer S., Mlawer, Eli J., Shephard, Mark W., Clough, Shepard A. and Collins, William D. ORCID: https://orcid.org/0000-0002-4463-9848 (2008) Radiative forcing by long-lived greenhouse gases:Calculations with the AER radiative transfer models. Journal of Geophysical Research Atmospheres, 113 (13). ISSN 0148-0227

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Abstract

A primary component of the observed recent climate change is the radiative forcing from increased concentrations of long-lived greenhouse gases (LLGHGs). Effective simulation of anthropogenic climate change by general circulation models (GCMs) is strongly dependent on the accurate representation of radiative processes associated with water vapor, ozone, and LLGHGs. In the context of the increasing application of the Atmospheric and Environmental Research, Inc. (AER), radiation models within the GCM community, their capability to calculate longwave and shortwave radiative forcing for clear sky scenarios previously examined by the radiative transfer model intercomparison project (RTMIP) is presented. Forcing calculations with the AER line-by-line (LBL) models are very consistent with the RTMIP line-by-line results in the longwave and shortwave. The AER broadband models, in all but one case, calculate longwave forcings within a range of -0.20 to 0.23 W m-2 of LBL calculations and shortwave forcings within a range of -0.16 to 0.38 W m-2 of LBL results. These models also perform well at the surface, which RTMIP identified as a level at which GCM radiation models have particular difficulty reproducing LBL fluxes. Heating profile perturbations calculated by the broadband models generally reproduce high-resolution calculations within a few hundredths K d-1 in the troposphere and within 0.15 K d-1 in the peak stratospheric heating near 1 hPa. In most cases, the AER broadband models provide radiative forcing results that are in closer agreement with high-resolution calculations than the GCM radiation codes examined by RTMIP, which supports the application of the AER models to climate change research.

Item Type:	Article
Uncontrolled Keywords:	condensed matter physics,physical and theoretical chemistry,polymers and plastics,materials chemistry,sdg 13 - climate action ,/dk/atira/pure/subjectarea/asjc/3100/3104
Faculty \ School:	Faculty of Science > School of Environmental Sciences
Related URLs:	https://www.scopus.com/pages/publication...
Depositing User:	LivePure Connector
Date Deposited:	07 Jul 2026 10:57
Last Modified:	12 Jul 2026 23:03
URI:	https://ueaeprints.uea.ac.uk/id/eprint/103710
DOI:	10.1029/2008JD009944

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