Unfortunately, establishing the reality of this cloud feedback requires a measurement of
global cloudiness with an accuracy of a small fraction of a percent — a very difficult problem.
Not exact matches
By analogy, a warmer world wouldn't be rainier (or cloudier); it's an imperfect analogy, because rain isn't absolutely correlated
with cloudiness, and lateral transport of energy by ocean, air, and latent heat currents in and out of the E & W Pacific Ocean areas won't scale to
global warming
Thus it appears that, provided further satellite cloud data confirms the cosmic ray flux low cloud seeding hypothesis, and no other factors were involved over the past 150 years (e.g., variability of other cloud layers) then there is a potential for solar activity induced changes in
cloudiness and irradiance to account for a significant part of the
global warming experienced during the 20th century,
with the possible exception of the last two decades.
With respect to Mr. Best's post, which I may be unfairly implying is a good example, one of the fallacious but clever debate manipulations utilized by CC deniers and (way too many) lukewarmers is to focus relentlessly (often inaccurately) on climatological research frontiers such as climate sensitivity, or relations between evaporation,
cloudiness, and
global albedo.
That allows latitudinal sliding of the jets and climate zones below the tropopause leading to changes in
global cloudiness and albedo
with alters the amount of energy getting into the oceans.»
An active sun gives more zonal jets and / or more poleward climate zones
with less
global cloudiness and more energy into the oceans for gradually strengthening El Ninos as compared to La Ninas and a gradual rise in
global tropospheric temperatures.
The changes in both satellite derived and measured surface insolation data are also in line
with changes in
global cloudiness provided by the International Satellite Cloud Climatology Project (ISCCP), which show an increase until the late 1980s and a decrease thereafter, on the order of 5 % from the late 1980s to 2002.
Lastly, there is a latitudinal variation in the cloud cover, such that around 20 ° N there are regions
with 0.10 less
cloudiness than the
global mean.