Tuesday, December 08, 2009

A first look at gridded data from the Met Office Land Surface Temperature Record

Well, I've got it working and here's a KML file for you to explore in Google Earth. When I say 'it' I mean:

1. Extract the data from the Met Office files

2. Check the Normals

3. Calculate anomaly data for all stations

4. Grid data onto 5 degree square portions of globe using algorithm in the HadCRUT3 paper

5. Turn all that into a coloured KML file for display in Google Earth

And here it is (that is the gridded anomaly data for October 2009 with the 1961-1990 average baseline):


For comparison here's the Met Office's higher resolution picture for the same period. Just staring at the two you can see that approximately the same thing is being plotted with western Europe warmer and Scandinavia and central Europe cooler (you can just make out the same cool spot in Scotland on both).


Phew. That was hard work.

I'll release the code once I've convinced myself that it works correctly.

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3 Comments:

Blogger europearchive said...

really cool you are doing this John.

"climategate" has made me realise that I need to understand more about the science and its helpful to see you working through it.

2:15 PM  
Blogger Nick Barnes said...

Excellent work.

10:32 AM  
Blogger steven said...

Very nice. I concur with Nick. I walked through your code. clean and well documented. I'll try to send more readers you way. I dont have time to walk through Brohan 06 ( i used to know it cold) ,but maybe some of the other guys who looked at it back in 2007 can help

8:23 PM  

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