. 2020 Jun 29;117(29):17084–17093. doi: 10.1073/pnas.2006087117

Table 3.

Transient aerosol K/Pg extinction simulations

Experiment	SST		666-m Depth		SAT						Precipitation
	SST		666-m Depth		Ocean		Land		Global		Ocean		Land		Global
	Before impact	Impact	Before impact	Impact	Before impact	Impact	Before impact	Impact	Before impact	Impact	Before impact	Impact	Before impact	Impact	Before impact	Impact
Aerosol 100 with ash deposit (Sc 11 and Sc 12)	22.1	2.49	11.81	11.88	21.38	−13.44	10.99	−30.21	18.63	−17.87	3.52	0.78	2.4	0.28	3.22	0.65
Aerosol 100 and 2 × CO₂ > 4 × CO₂ with ash deposit (Sc 13 and Sc 14)	23.93	4.05	11.81	11.88	23.59	−8.23	14.95	−25.96	21.31	−12.92	3.59	0.91	2.51	0.33	3.31	0.75

A set of transient simulations with perturbed aerosol atmospheric optical depth, pCO₂ concentrations, and ash layer deposits is performed over a set of 200-y simulations. Their individual global, land, and oceanic impact on specific climate variables (sea surface temperature [SST; degrees Celsius], surface air temperature [SAT; degrees Celsius], precipitation [millimeters per day]) for the 50-y mean preimpact climate state and the mean of the three coolest years resulting from the postasteroid impact. The complete set of experiments with sensitivity tests is presented in SI Appendix. Sc, scenario.