[PDF]. It describes itself as a “preliminary introduction” inspired by info in the ClimateGate leak. Primarily about the National Climatic Data Center at the NOAA (National Oceanic and Atmospheric Administration — a US Govt Agency) and the GHCN (the Global Historical Climatology Network, i.e. the world’s climatic databases):
[...] CRU’s Director at the time Phil Jones acknowledges that CRU mirrors the NOAA data. “Almost all the data we have in the CRU archive is exactly the same as in the Global Historical Climatology Network (GHCN) archive used by the NOAA National Climatic Data Center.”
NOAA appears to play a key role as a data gatherer/gatekeeper for the global data centers at NASA and CRU. Programmer E.M. Smith’s analysis of NOAA’s GHCN found they systematically eliminated 75% of the world’s stations with a clear bias towards removing higher latitude, high altitude and rural locations, all of which had a tendency to be cooler. The thermometers in a sense marched towards the tropics, the sea and to airport tarmacs.
The PDF summarizes manipulation of data/data-sources around the world, including…
- Canada: “…the number of stations dropped from 600 to 35 in 2009. The percentage of stations in the lower elevations (below 300 feet) tripled and those at higher elevations above 3000 feet were reduced in half.”
- China: “…100 stations in 1950, over 400 in 1960 then only 35 by 1990. [...] CRU’s own Phil Jones showed in 2008 peer review paper that contamination by urbanization in China was 1.8F per century. Neither NOAA nor CRU adjusts for this contamination.”
- “High elevation stations have disappeared from the data base. Stations in the Andes and Bolivia have vanished. Temperatures for these areas are now determined by interpolation from stations hundreds of miles away on the coast or in the Amazon.”
- New Zealand: “…where raw data for major cities shows virtually no trend (0.06C/century), adjusted data has a 0.92C warming.”
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