GHCN Say It Can’t Be That Cold In Greenland
By Paul Homewood
ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/products/stnplots/4/
Not content with fiddling with temperatures in Iceland (see here), GHCN have also been using the same trick in Greenland, as the above graph shows for Nuuk. Top right graph is original unadjusted data, middle is after GHCN adjusted, and bottom is the adjustment itself. By cooling the actual temperatures up to about 1980, and increasing temperatures since, they have magically warmed Nuuk by about 1C.
There are only four current GHCN stations in Greenland with records back to 1940, and three of these – Upernavik, Jakobshavn and Nuuk, – have similar adjustments. Only one, Angnagssalik does not.
Why are a few stations in Iceland and Greenland important? According to GISS, the Arctic is the fastest warming place on the planet, and yet they have temperature data for only a very small part of it. Instead they rely on extrapolating (i.e. guessing) temperatures from stations up to 1200 km away. Consequently, if these adjusted figures are used, temperatures in a large chunk of the Arctic could end up being overestimated.
P.S. GHCN were asked 3 days ago to comment on these adjustments. Apart from a standard reply, I have not heard anything as yet.
Comments are closed.
NOT A LOT OF PEOPLE KNOW THAT 
Paul
The folders containing the station plots are now empty. They were OK yesterday.
You can see the 8 folders here, but nothing is inside:
ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/products/stnplots/
Very strange! I checked half an hour ago and you were tight. Just checked again and they had reappeared again, although they are dated 22/1/12.
Thanks. Now I can see them too 🙂
See my blog here about the adjustments: http://agbjarn.blog.is/blog/agbjarn/entry/1218545/#comments
All in Icelandic however.
The links to the graphs are in comment #4
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By the way, I have been waiting to see auroras after the coronal mass ejection (CME) that hit Earth’s magnetic field at 0617 UT on Jan. 22nd. Nothing to be seen yet, but something seems to be starting now. See my Aurora page: http://www.agust.net/aurora/
Interesting. Look at the dates on the files. 22/01/2012. They changed them in some way at 6 am on a Sunday morning!
Agust could you do a blog page in english?
Can’t see any real changes, so I assume it is just a normal update!