The necessary assumptions are that the standard is in fact universal and that adherence to it is a universal possibility.
know that subgrid models do not resolve actual weather patterns, therefore some parametrisation has to be involved, with
all necessary assumptions / simplifications, implicit or explicit adjustment of fluxes, etc..
While there are
some necessary assumptions in empirically based sensitivity analyses that I am not entirely comfortable with, the qualitative conclusion made by Nic Lewis seems robust: lower values of ECS seem justified in view the reduce values of aci.
If financial projections — whether historical performance figures or «future oriented» projections — are included,
the necessary assumptions and supporting information as required under the Regulation;