Jim D,
Responding to two posts in one.
Re: warming prior to 1998. If underestimated, then was it due to the effects of the Clean Air Act and the aerosols emissions reductions? Not aware of a study that’s accounted for the US’s contribution “globally” from prior to this time, and this has been a question in my mind regarding Hansen’s earlier work. And was that warming natural/anthro. And attribution %’s.
Then this: “The hiatus is not an issue because the ocean heat content was increasing consistently with the forcing change. Pauses are expected in the warming record because of natural variation that can add to or subtract from decadal climate change because that is only tenths of a degree. There was a major natural warming that culminated in 1998, that is not often mentioned, but it subsided in what has become known as the pause.”
Could it be the “pause/hiatus” is partially as a result of the increasing CO2 not allowing solar to reach the surface? The solar heat energy thru my single pane window is discernable on both sides. Thickness affects the interior results.
Formulated thoughts (and modification invited).
Solar radiation should be monitored TOA to surface.
CO2’s greenhouse effects should reradiate in all directions.
Land based ice index.
Aerosols index.
Albedo index.
Water vapor increases as a result of warmer waters, creating healing effects (more snow –> more ice).
Water vapor index. (More veg. sequesters water vapor)
CO2 index (starting point as I see it is 280 ppm) attribution needed for understanding.
Ocean temps. index.
Biomass index.
TOA index. Is TOA “static”?
All needed as inputs to model climate reasonably, and to attribute anthro. must be based on a time prior to the industrial age. Then, to attribute to CO2 must not all the other variables be eliminated as to cause? Sounds chaotic. What have I missed?
Finally, “This was a natural variation in the same direction as the background warming.” Background warming? And how is it defined that prior the 1998 the “major warming was natural” when CO2 emissions had been increasing for years prior?