This is a tool for accessing long term weather data sourced by Hadley Centre and CRU. The map shows the location of those stations with data going back earlier than 1860 (See next post for the others). “Mouse over” gives the name of the station and click shows the graph. You can zoom in by dragging a rectangle over an area.
[kml_flashembed publishmethod=”static” fversion=”8.0.0″ movie=”/world/world.swf?data_file=/world/1850.xml” width=”600″ height=”400″ targetclass=”flashmovie”]
[/kml_flashembed]
These are the stations used to generate the HADCRU3V dataset, and are kindly made available by the Hadley centre of the UK Met Office. For each station I have generated a time series graph showing temperatures and “anomalies” for the full time span. The Flash graph is by DIY map . The PERL GD package was used to create over 5000 graphs. Please note that GD can distort time scales because missing gaps of data are not shown. However trends in data are respected.
NOTES:
1. All station data for all time spans can be viewed in one application HERE
2. At one single location there is to my eye no evidence of a systematic rise in temperatures locally. For example mean Dublin temperatures have not changed throughout continuous temperature measurements from 1850 to today. The results are shown below. So it looks like we will still have to wait for a very long time before “Hawaiian” style warmth reaches the Irish Riviera!
DUBLIN Temperature and Anomalies relative to a 1960-1990 average
What is the basis for the mean temperature used to produce the anomalies?
Fascinating. From the few I looked at the ones that show some warming from say 1950 0n seem to be larger cities, at least ones with names I recognize.
The anomalies as used in all IPCC reports are based on divergences from monthly “normals”. These normals are the the average temperatures calculated at each weather station per month between 1961 to 1990.
Then each yearly “anomly” is averaged with any others within in a 5 degree (lat,lon) grid. The final global yearly average “anomaly” temperature is the surface area weighted value for the Earth. This is then the “evidence” of global warming since 1950. As you can see, the coverage in 1850 was really very sparse. Furthermore there is some evidence of systematic shifts in temperature measurements at several stations.
Pingback: A Study of Hadley-CRU weather station data | Clive Best
Pingback: How reliable are global temperature “anomalies” ? | Watts Up With That?
Pingback: How reliable are global temperature “anomalies” ? | Watts Up With That?
I’m really interested to see data for Hobart Airport back to 1850. Australian Bureau of Meteorology only says it has been open since June 1958, but maybe Hadcrut knows better.
http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=122&p_display_type=dailyDataFile&p_startYear=1958&p_c=-1774394986&p_stn_num=094008