2016/12/27 by Maryam Etminan, Gunnar Myhre, E. J. Highwood +1 · 4 citations
Earth and Planetary Sciences · Environmental Science · #Atmospheric Ozone and Climate #Atmospheric and Environmental Gas Dynamics #Atmospheric chemistry and aerosols
paper · pdf · doi:10.1002/2016gl071930
openalex publication_date 2016/12/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
Abstract New calculations of the radiative forcing (RF) are presented for the three main well‐mixed greenhouse gases, methane, nitrous oxide, and carbon dioxide. Methane's RF is particularly impacted because of the inclusion of the shortwave forcing; the 1750–2011 RF is about 25% higher (increasing from 0.48 W m −2 to 0.61 W m −2 ) compared to the value in the Intergovernmental Panel on Climate Change (IPCC) 2013 assessment; the 100 year global warming potential is 14% higher than the IPCC value. We present new simplified expressions to calculate RF. Unlike previous expressions used by IPCC, the new ones include the overlap between CO 2 and N 2 O; for N 2 O forcing, the CO 2 overlap can be as important as the CH 4 overlap. The 1750–2011 CO 2 RF is within 1% of IPCC's value but is about 10% higher when CO 2 amounts reach 2000 ppm, a value projected to be possible under the extended RCP8.5 scenario.