claim: Though CRU neglected to provide an exact list of temperature stations, it could not have hid or tampered with data.
evidence: The Climatic Research Unit developed its gridded CRUTEM data set of land air temperature anomalies from instrumental temperature records held by National Meteorological Organisations around the world, often under formal or informal confidentiality agreements that restricted use of this raw data to academic purposes, and prevented it from being passed onto third parties.