Description: AMIP conditions in which the SST and sea ice has been calculated from CMIP5 historical and historicalNat simulations. (see: A benchmark estimate of the effect of anthropogenic emissions on the ocean surface for details). The GHG and ozone concentrations are adjusted to their pre-industrial values.

Experiment ID: amip_nat_hist

Years: 1959-2014

Sea Surface Temperature (SST)	Calculated as the difference between CMIP5 historical and historicalNat simulations. Stone, D.A., and P. Pall, Submitted, A benchmark estimate of the effect of anthropogenic emissions on the ocean surface.
Sea Ice (SIC)	Sea ice is determined using the method described in: Stone, D.A., and P. Pall, Submitted, A benchmark estimate of the effect of anthropogenic emissions on the ocean surface.
Greenhouse Gases (GHG)	Pre-industrial values.
Ozone (03)	Pre-industrial values.
Aerosols	Historical Values