"Water vapor feedback"

This seems to be a recently made up term, or idea, to explain climate change, but only in the warming direction, it does not seem to appear or factor in to the ice age theories. (?) In fact, it seems to have appeared (in books) at the same time as global warming theory started showing up. It does not show up in weather textbooks, or meteorology books.

1980 Variations of the solar constant

Carbon Dioxide and the Greenhouse Effect

Archives for Meteorology, Geophysics, and Bioclimatology

History of "global warming theory", or "theory of global warming"

Ngram viewer shows term started in 1983, which was sort of surprising.  The greenhouse theory is a much older term.

Early examples of "the global warming theory" being used.

1991 California energy commision

1992 The green encyclopedia

1992 Hearings before the Committee on Energy and Natural Resources

An example of how GISS is nothing like the NCDC global data

Feb 1963 NCDC global land land mean + 1.27C compare with GISS

Feb 2014 NCDC global land land mean  + .23C - compare with GISS

GISS makes it look like Feb 1963 was much colder than February 2014.  The NCDC global data shows 1963 much warmer for the global land mean.

The two data analysis differ in some significant ways

Looking at 2014 and the other warmest years

This graphic shows the three warmest years, against the highest records, which is a combined figure, using each months warmest anomaly.

Note that for Dec-Jan-Feb and even March the warmest month is not for those three record years.  In fact, for 2014 and 2005 February is very low.   2010 shows a very cool December. 

This is not some obscure point, 2014 is cliamed to be the warmest year on record, yet shows a very cold February anomaly, which matches the trend, globally, of February cooling since 1998 (warmest February anomaly ever)

Here are the GISS global charts for December

January

February

March

Here are the same graphs using just the NH land anomalies.

Dec

Jan

Feb

Mar

February, for both the GISS global mean, as well as the NH mean, shows cooling, which is the exact opposite of what global warming theory predicts, based on an enhanced greenhouse effect.

That this shows up clearly, even with the warmest years, is an important issue, the reason for new theories about how climate is changing.

When Trenberth's claim about extreme weather is a result of  a generally warmer and moister atmosphere is used to explain the much colder winters, and the extreme amounts of snow, it's complete nonsense.  Because the NH winter atmosphere is not warmer.  The data clearly shows this.