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originally posted by: mbkennel
a reply to: guohua
All about surface temperature. Add in ocean temperature.
originally posted by: Semicollegiate
originally posted by: mbkennel
originally posted by: Semicollegiate
a reply to: mbkennel
There was NO previous scientific consensus about man-made global cooling!
The 70's scientists were economists and political scientists who claimed that energy should be rationed because we would run out when the climate turned colder.
You mean, people thinking of the consequences of what would happen if there was significant cooling? What's the problem with that?
Back then economists and political scientists didn't pretend to be climatologists, unlike now. IF there was going to be significant cooling, then yes you would need to lower energy consumption and increase insulation because all else being equal consumption for heating might increase.
Thinking about contingencies is a good use of expert brain power. At that time, the 1970's, the climate had been cooling for 20 years or so. I remember back then, rain puddles would commonly freeze over night.
However, what was happening was pro government propaganda. Every news show talked about the energy crisis with a subtext of the world is going to freeze, get ready to obey parental government. An short allusion to doom if the free market wasn't socialized advertised itself at the beginning of every science text book. Unavoidable rationing was also mentioned.
As soon as the cold spell ended, the socialists started on global warning. It stands to reason that the climate will get warmer after it has been colder. I guess they discovered some success in imparting a doom for sure, someday, message.
As soon as the cold spell ended, the socialists started on global warning. It stands to reason that the climate will get warmer after it has been colder. I guess they discovered some success in imparting a doom for sure, someday, message.
originally posted by: Semicollegiate
originally posted by: mbkennel
a reply to: guohua
All about surface temperature. Add in ocean temperature.
Add in net mantle movements against the crust, and whether the wobble of the Earth matches the variations in solar out put and motion, the variations of lunar motion, and whatever the magnetic field of the Earth is doing, etc...
So you have models showing global warming forcing from variations in lunar motion, and the quantitative mechanistic explanations backed by extensive experimental and theoretical work?
Although we have delved into properties of the tides in some detail to test whether a correlation of tidal strength with temperature exists, much more might be accomplished by a closer attention to the possible physical basis for the correlations found. Until now, to mount such an effort has not seemed worthwhile, given the small perceived likelihood that any lunisolar tidal connection to climate exists.
We have only touched upon a possible cause by proposing that strong tides increase vertical mixing in the oceans and thereby episodically cool the sea surface. Also, we have explored in detail only 6- to 10-year periodicities seen in records of both temperature and tidal forcing. We propose, nevertheless, that the near synchronicities seen at these periodicities argue sufficiently in favor of a tidal-forcing hypothesis, to justify further investigation of a possible tidal mechanism of temperature and climate variability.
www.pnas.org...
Looking ahead, a prediction of ‘‘pronounced global warming’’ over the next few decades by Broecker, presumed to be triggered by the warm phase of an 80-year climatic cycle of unidentified origin, would be reinterpreted as the continuation of natural warming in roughly centennial increments that began at the end of the Little Ice Age, and will continue in spurts for several hundred years.
Even without further warming brought about by increasing concentrations of greenhouse gases, this natural warming at its greatest intensity would be expected to exceed any that has occurred since the first millennium of the Christian era, as the 1,800-year tidal cycle progresses from climactic cooling during the 15th century to the next such episode in the 32nd century.
www.pnas.org...
In the 1970's, leftists hated scientists.
Our next objective is to describe the periodicities of extremely strong tidal events. In so doing we do not wish to imply that single tidal events are likely to be responsible for modulating sea surface temperature worldwide.
They may be important, however, because they identify times of generally great tidal dissipation of kinetic energy, which could modulate temperature by means of an ensemble of events over days or even years.
The motions of the Earth and Moon, although periodic, do not produce truly periodic strong tidal events, because these events require the near coincidence of four incommensurate recurring astronomical relationships, namely syzygy, perigee, eclipse, and perihelion.
This circumstance, although adding complexity to the analysis, may, however, be an asset in proving a connection between tides and temperature, because interrupted or transient tidal periodicities should produce characteristic signatures of tidal forcing in temperature records.