Monday, January 11, 2010

Six additional stations for the Met Office land surface climate station record

Running through some final diagnostics on the Met Office land surface climate station records I revisited a minor issue that had been in the back of my mind: some of the stations have 'normals' but 'no standard deviations'.

There are 39 stations that fall into that category. Of those 30 have normals from WMO data, 3 are 'extrapolated' and 6 come from the data itself ('Data'). The final six are interesting because if the normals are from the 1961-1990 data present in the station file itself it should be possible to calculate the standard deviations as well.

The six files that are affected are: 10/104880, 60/606700, 68/680140, 82/829830, 83/835790, 96/961090.

Since these files have no standard deviations they are not being used by my program, or the program released by the Met Office. However, it is possible to calculate the standard deviations for all those locations because there is 15 years of data for each month between 1961 and 1990 (that's the criteria in Brohan et al. 2006.

So here for your use are the standard deviations for those files (one decimal place of accuracy):

10/104880: 3.6 3.3 2.4 1.1 1.4 1.2 1.7 1.1 1.5 1.3 1.5 1.8
60/606700: 1.8 1.9 1.7 1.4 1.2 0.9 1.0 0.7 0.7 1.3 1.6 1.7
68/680140: 1.5 1.3 0.9 1.0 1.0 1.1 0.7 1.0 1.0 0.8 1.0 1.0
82/829830: 1.0 1.4 0.8 0.9 1.0 1.0 0.6 0.7 0.7 1.2 0.9 1.4
83/835790: 1.5 1.5 1.1 1.8 1.2 1.2 2.2 1.1 1.7 1.2 1.1 0.7
96/961090: 0.7 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.4 0.5 0.6 0.5


Update The Met Office says it's OK to use these stations.

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