Category Archives: Data and observations

by Judith Curry

Part I addressed the mid-20th century surface temperature “bump” (peaking circa 1940).  The IPCC AR4 states in  the figure caption for FAQ3.1, Figure 1:

From about 1940 to 1970 the increasing industrialisation following World War II increased pollution in the Northern Hemisphere, contributing to cooling, and increases in carbon dioxide and other greenhouse gases dominate the observed warming after the mid-1970s.

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by Judith Curry

The preparation of a new land surface temperature record was heralded last week in this news article entitled “Professor counters global warming myths with data.”  The article states:

The Berkeley Earth Surface Temperature Study was conducted with the intention of becoming the new, irrefutable consensus, simply by providing the most complete set of historical and modern temperature data yet made publicly available, so deniers and exaggerators alike can see the numbers.

So what is this all about?

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by Peter Webster

The mid-20th century temperature “bump” (peaking circa 1940) is an interesting feature of the temperature record.  This “bump” was discussed in an email from Tom Wigley to Phil Jones referring to a WUWT post that  discusses a paper by Thompson et al.

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