Are we anywhere close to really understanding the strength of natural climate variation and how it works?
We can easily overlook that most temperature measurements are taken on land, but over 70% of the Earth’s surface is deep water.
Frederick Colbourne investigates.
Climate Research Unit, University of East Anglia
The Climatic Research Unit (CRU) was established in the School of Environmental Sciences (ENV) at the University of East Anglia (UEA) in Norwich in 1972.
The CRU has collected, collated and archived global climate data for over 40 years.
In 1987, the American Meteorological Society published a paper by Stanley Grotch of the Lawrence Livermore National Laboratory, University of California, that assessed the robustness of the CRU dataset for land and other datasets.
Three data bases of gridded surface temperature anomalies were used to assess the sensitivity of the average estimated Northern Hemisphere (NH) temperature anomaly to: 1) extreme gridpoint values and 2) zonal band contributions. Over the last 100 year, removal of either the top or bottom 10% of the gridpoint anomalies in any year changes…
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