Table 4.

Historic ERF Medians for the Full 1750–2018 Period and the Two Time Periods Analyzed in This Report

Periods	Carbon dioxide	Other well mixed greenhouse gases	Tropospheric ozone	Stratospheric ozone	Aerosol	Land use albedo	Stratospheric water vapor	Black Carbon on snow	Contrails	Solar	Volcanic
BASELINE ERFs with Bellouin et al. ( 2020 ) unconstrained aerosol PDF
1750 to 2018	2.147	1.110	0.425	−0.050	−1.395	−0.163	0.079	0.040	0.050	0.000	−0.171
1861–1880 to 2006–2018	1.731	0.969	0.348	−0.050	−1.179	−0.106	0.064	0.020	0.048	0.017	−0.113
1850–1900 to 2006–2018	1.705	0.961	0.344	−0.050	−1.092	−0.105	0.064	0.018	0.048	0.011	0.180
Modified aerosol ERF to extended Boucher et al. ( 2013 ) estimate, other columns as above
1750 to2018					−0.842
1861–1880 to 2006–2018					−0.667

Note. Half Gaussians are used to create the individual PDFs for sampling unless except for the aerosol ERF in the BASELINE case which employs the unconstrained PDF from Figure 8 of Bellouin et al. (2020). The row appearing in boldface contains the values used in the Baseline calculation.