AddPrefabPostInit("your_character",function(inst)

    inst.temperature_bonus = 0.2  -- Means +20%

    local save_ignore_temp
    inst:ListenForEvent("temperaturedelta",function(inst,data)
        if save_ignore_temp then
            save_ignore_temp = false --Skip this event.
        else
            local delta = data.new - data.last
            local bonus_delta = delta * inst.temperature_bonus
            if bonus_delta ~= 0 then
                save_ignore_temp = true
                --Will cause the event again, we should skip it.
                inst.components.temperature:DoDelta(bonus_delta)
            end
        end
    end)

end)