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Temperature-anomalies


Northern hemipshire temperature-anomalies from 4 different sources what at available on the net.
Noteble here are that every source use different timeframe as "normal" average and also that for how long time backvards data are available vary. Data are updated once a month.

UAH

°C

Show years:

Info:
Average: 1981-2000
Measured with NOAA-satellites.
Data from year: 1979

Data courtnesy of University of Alabama/National Space Science and Technology Center (NSSTC) .

 

NCDC

°C

Show years:

Info:
Average: 1901-2000
Surface data: Global Historical Climate Network (GHCN)
Ocean data: Extended reconstructed sea surface temperature (ERSST)
Data from year: 1880

Data courtnesy of NOAA/National Climatic Data Center (NCDC) .

 

HadCRUT4



Data courtnesy of UK MetOffice/Hadley Centre .

 

Disclaimer: This is not a declaration for or against global warming, just shows the differences between different data sources.

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