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Berkley Earth Temperature Analysis - possible flaws ?


Berkley Earth Temperature Analysis - possible flaws ?01-02-2014 14:26
kfl
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Berkley Earth Temperature Analysis - possible flaws?
I have discovered that there are several flaws in Berkley Earth's emperature analysis.

In several cases they have made a double counting of Danish weather stations. Go to BEST 's website and find the following weather stations : VESTERVIG and VESTERVIG-1

Here I have copied the descriptions of the two weather stations VESTERVIG and VESTERVIG-1:


BEST: Vestervig-1
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 13120
% Primary Name: VESTERVIG-1
% Record Type: TAVG
% Country: Denmark
% Latitude: 56.76670 +/- 0.00005
% Longitude: 8.31670 +/- 0.00005
% Elevation (m): 18.00 +/- 0.50
% # of Months: 1641
%
% IDs: ghcnd - DA000021100
%
% Sources: Global Historical Climatology Network - Daily
%
% Site Hash: c3f59b15c830eb2975fc4eed5ca0e5bf
% Raw Data Hash: d5fe218f629f8b80d26d38ef41eb3e15
% Adj Data Hash: c253b28acea2cca83fb0cc6beb0d5d44

VESTERVIG:
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 154597
% Primary Name: VESTERVIG
% Record Type: TAVG
% Country: Denmark
% Latitude: 56.76361 +/- 0.00014
% Longitude: 8.32056 +/- 0.00014
% Elevation (m): 18.27 +/- 0.78
% # of Months: 1512
%
% Alternate Names: Vestervig
%
% IDs: ghcnm - 61206052001
% hadcru - 60527
% wmo - 6051
%
% Sources: Global Historical Climatology Network - Monthly v2
% Hadley Centre Data Release
% Global Historical Climatology Network - Monthly v3
% World Meteorological Organization Metadata

BEST perceives those stations as different since they have different geographical coordinates and are read from different sources. Of course there migh be a bug in the geographical coordinates or there are actually two separate weather stations.

If we believe in the geographical coordinates specified ,VESTERVIG-1 is in the middle of a field and VESTERVIG located right in town!

The geographic coordinates for Vestervig is ( 56.7637N , 8.3206E ) .

There is only one weather station at Vestervig placed in the middel of the town.

DMI's geographical coordinates of Danish weather stations can be found here DMI Technical Report 13-10 page 12 and 13.

Using BEST's google map one can find candidates for dobbled counting.

I also suspect double counting of other Danish weather stations : Nordby, Hammer Odde Fyr and Due Odde,.....

I do think it is a general problem in BEST's analysis of temperature data.
Edited on 01-02-2014 14:29
RE: Vestervig Weather stations02-02-2014 09:25
kfl
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(31)
Her is Google map of the two Vestervig stations:

RE: Nordby Weather station02-02-2014 10:11
kfl
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(31)
Nordby Weather station

Nordby
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 154566
% Primary Name: NORDBY
% Record Type: TAVG
% Country: Denmark
% Latitude: 55.44833 +/- 0.00014
% Longitude: 8.39972 +/- 0.00014
% Elevation (m): 5.00 +/- 0.50
% # of Months: 1318
%
% Alternate Names: Nordby
%
% IDs: hadcru - 61970
% wmo - 6088
%
% Sources: Hadley Centre Data Release
% World Meteorological Organization Metadata

Nordby(FANO) – 1
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 13072
% Primary Name: NORDBY (FANO)-1
% Record Type: TAVG
% Country: Denmark
% Latitude: 55.45000 +/- 0.00500
% Longitude: 8.40000 +/- 0.00500
% Elevation (m): 4.00 +/- 0.50
% # of Months: 1588
%
% IDs: ghcnd - DA000025140
%
% Sources: Global Historical Climatology Network – Daily

According to the Danish Meteorological Institute the Nordby Weather Stations has the coordinates (55.4484N,8.3998E).


Edited on 02-02-2014 10:17
RE: Denmarks ?02-02-2014 10:28
kfl
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(31)
On the BEST homepage there is another flaws:

When you search for "Denmark", there will be two cases:

DENMARK
DENMARK(EUROPE)

Flaw nr. 1.
The first DENMARK is a city in USA and not a Country or State. This means a wrong classification.

Flaw nr.2.
Both DENMARK's have the same nearby city: Copenhagen, Malmø, Århus.
This is not correct.

These flaws are only formal flaws and might not affect the temperature estimation al all.
RE: More on Vestervig Weather Station02-02-2014 11:06
kfl
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The two Best Vestervig Stations differs in respect of span of years and in temperatures as well. They allso differs from the official Danish temperatures for Vestervig.




If there are many of these artificial weather stations with similar data, which are close, but not identical data, questions might be asked about the validity af BEST's results.

The cause for the existence of the artificial stations might come from reading data from several sources with differences in the geographical coordinates and differences in data. It is a problem not created by Best, but by the providers of temperature data.

It might be discussed who is responsible for checking the data before they are used, however I think it must be the responsibilty of BEST to do it.

The big question:

Does the problem of artificial weather stations also exist in other temperature reconstructions ? I do not know !
Edited on 02-02-2014 11:30
RE: Hammer Odde02-02-2014 14:26
kfl
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(31)
Hammerodde Fyr
%This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 13065
% Primary Name: Hammerodde-Fyr
% Record Type: TAVG
% Country: Denmark
% Latitude: 55.30000 +/- 0.05000
% Longitude: 14.80000 +/- 0.05000
% Elevation (m): 11.00 +/- 0.50
% # of Months: 1314
%
% IDs: hadcru - 61930
%
% Sources: Hadley Centre Data Release


HAMMER ODDE FYR-1
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 154563
% Primary Name: HAMMER ODDE FYR-1
% Record Type: TAVG
% Country: Denmark
% Latitude: 55.29898 +/- 0.00107
% Longitude: 14.77748 +/- 0.00567
% Elevation (m): 9.96 +/- 1.10
% # of Months: 514
%
% Alternate Names: HAMMER ODDE
% HAMMER ODDE FYR
%
% IDs: ghcnd - DA000032020
% gsod - 061930-99999
% usaf - 61930
% wmo - 6193
%
% Sources: Global Historical Climatology Network - Daily
% Global Summary of the Day
% World Meteorological Organization Metadata


Hammer Odde Fyr from DMI :(55.2980N,14.7718E)


RE: Maribo & Maribo Airport03-02-2014 16:48
kfl
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(31)
Maribo
This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 135848
% Primary Name: MARIBO
% Record Type: TAVG
% Country: Denmark
% Latitude: 54.70000 +/- 0.00500
% Longitude: 11.45000 +/- 0.00500
% Elevation (m): 4.00 +/- 0.05
% # of Months: 248
%
% IDs: gsod - 061430-99999
% icao - EKMB
% usaf - 61430
%
% Sources: Global Summary of the Day


Maribo Airport
% This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 13035
% Primary Name: MARIBO AIRPORT
% Record Type: TAVG
% Country: Denmark
% Latitude: 54.70000 +/- 0.00500
% Longitude: 11.45000 +/- 0.00500
% Elevation (m): 5.00 +/- 0.05
% # of Months: 62
%
% IDs: gsod - 061441-99999
% gsod - 061443-99999
% icao - EKMB
% usaf - 61441
% usaf - 61443
%
% Sources: Global Summary of the Day
%




This is a case with two weather stations with apparently the same geographical coordinates!

The coordinates of Maribo (57.752N,11.4935E) and the distance between the two places is 9250 meter.
Edited on 03-02-2014 16:50
RE: FLORO - a Norwegian weather station04-02-2014 13:00
kfl
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(31)
FLORO AP
% This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 157219
% Primary Name: FLORO AP
% Record Type: TAVG
% Country: Norway
% Latitude: 61.57485 +/- 0.00835
% Longitude: 5.02221 +/- 0.00571
% Elevation (m): 9.00 +/- 0.05
% # of Months: 389
%
% IDs: gsod - 013100-99999
% icao - ENFL
% usaf - 13100
% wmo - 1310
%
% Sources: Global Summary of the Day
% World Meteorological Organization Metadata


FLORO LUFTHAVN
% This file contains a station summary listing for a temperature
% station in the Berkeley Earth database. This station is identified as:
%
% Berkeley ID#: 18948
% Primary Name: FLORO LUFTHAVN
% Record Type: TAVG
% Country: Norway
% Latitude: 61.58310 +/- 0.00005
% Longitude: 5.02780 +/- 0.00005
% Elevation (m): 9.00 +/- 0.50
% # of Months: 133
%
% IDs: ghcnd - NOE00134470
%
% Sources: Global Historical Climatology Network – Daily



The two weather stations have different coordinates and the same elevation and have overlapping reporting period.

The data for two stations are read from different sources.

Here is the Google Map of the two stations:



It is obvious that the coordinates are wrong for FLORA AP.

The following graphs shows the data plotted:



To my judgement, the stations are identical and the deviations are caused by reading from two sources.
Edited on 04-02-2014 13:25
RE: CRUTEM4 /Google Map04-02-2014 20:32
kfl
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(31)
There is no double counting on CRUTEM4I in respect af Danish Weather station:Exploring CRUTEM4 with Google Earth.
RE: AP=AIRPORT=LUFTHAVN07-02-2014 22:51
kfl
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(31)
Please note that "xxxx AP" in most cases means "xxxx Airport" and "xxxx LUFTHAVN" equals "xxxx AIRPORT".




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