GC133-04
Effective Radiative Forcing from Aerosols and Reactive Gases: A Multimodel Comparison from AerChemMIP Experiments
Thursday, 17 December 2020: 05:42
Virtual
Gillian Thornhill1, William Collins2, Ryan J. Kramer3, Dirk Olivié4, Fiona M O'Connor5, N. Luke Abraham6, Susanne E Bauer7, Makoto Deushi8, Louisa K Emmons9, Piers Forster10, Larry Wayne Horowitz11, Ben Thomas Johnson12, James M Keeble13, J F Lamarque14, Martine Michou15, Michael J Mills16, Jane Patricia Mulcahy17, Gunnar Myhre18, Pierre Nabat19, Vaishali Naik11, Naga Oshima20, Michael Schulz21, Christopher James Smith22, Toshihiko Takemura23, Simone Tilmes16, Tongwen Wu24, Guang Zeng25 and Jie Zhang Dr.26, (1)University of Reading, Reading, United Kingdom, (2)University of Reading, Reading, RG6, United Kingdom, (3)University of Miami, Miami, FL, United States, (4)University of Oslo, Oslo, Norway, (5)Met Office Hadley Centre, Exeter, United Kingdom, (6)University of Cambridge, Chemistry, Cambridge, United Kingdom, (7)NASA GISS, New York, NY, United States, (8)Meteorological Research Inst., Tsukuba, Japan, (9)National Center for Atmospheric Research, Boulder, CO, United States, (10)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (11)NOAA GFDL, Princeton, NJ, United States, (12)Met Office, Exeter, United Kingdom, (13)University of Cambridge, Cambridge, United Kingdom, (14)NCAR, Boulder, CO, United States, (15)Météo-France Toulouse, Toulouse Cedex 01, France, (16)National Center for Atmospheric Research, Atmospheric Chemistry, Observations, and Modeling Laboratory, Boulder, CO, United States, (17)Met Office Hadley Centre for Climate Change, Exeter, United Kingdom, (18)Center for International Climate and Environmental Research Oslo, Oslo, Norway, (19)METEO FRANCE/CNRM, Toulouse, France, (20)Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan, (21)Norwegian Meteorological Institute, Climate and Air Pollution Section, Oslo, Norway, (22)University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, (23)Kyushu University, Fukuoka, Japan, (24)National Climate Center, Chinese Meteorological Administration, Beijing, China, (25)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (26)National Climate Center, China Meteorological Administration, Beijing, China
Abstract:
The effects of aerosols and chemically reactive gases on the radiative balance of the atmosphere has been investigated using the AerChemMIP set of modelling experiments, which are a subset of the 6th Coupled Model Intercomparison Project (CMIP6). The effect of the radiative perturbations for each of the forcing agents can be characterised by calculating the effective radiative forcing (ERF) at the top of atmosphere (TOA) for pre-industrial (PI) to present day (PD) emissions or concentrations. Several models from the CMIP6 project followed the AerChemMIP experimental protocols, allowing for a consistent calculation method for the ERFs for each model. The multi-model spread between the ERFs is examined using a breakdown of the contributions from atmospheric adjustments calculated using radiative kernels. The relative importance of aerosol-cloud interactions and aerosol-radiation interactions for each of the aerosol/gas components is also discussed.
