The disclosure of climate data from the Climatic Research Unit at the University of East Anglia - Science and Technology Committee Contents


Memorandum submitted by G R Ryan (CRU 05)

SAMPLING

  As any scientist knows, comparative sampling is only valid if the samples being compared are from exactly the same medium or, where that is not possible, the differences are determined and factored into the comparison. Thus one does not compare for geochemical purposes a sample of stream sand with a sample of nearby laterite.

  I would have thought, therefore, that the IPCC, when erecting its models, would have observed this rule. But it seems not.

TEMPERATURE

  As a city grows, so does the ambient temperature. I experienced a very convincing example of this in England in 1977. I was staying with relatives in the country and went into the City for a meeting. Coming out onto slushy cold streets was not much fun. But when the train was stuck in snowdrifts on the way to where I was staying in Surrey was less fun. The Met Office explained that the snow did not reach the ground over London, and had melted into rain, because of the warmth of the city.

  Thus to compare temperature readings from the same thermometer in the same location after the host city has grown both outwards and upwards by several orders of size over the decades has no validity at all.

SEA LEVEL

  As any resident of the tropics knows, the sea can rise up to a metre at the centre of a low pressure system that has become a cyclone. Furthermore water, like most substances, expands as the temperature rises, and contracts as it cools. Thus one would have thought that when sea levels are being measured there would automatically be kept a record of the atmospheric pressure and water and atmospheric temperature at the time of the reading, so that the levels can be adjusted to a common base accordingly.

  I can find no record that that is the practise, which makes statements about sea level changes suspect to say the least.

CONCLUSION

  If these are examples of the IPCC's sampling protocols not much faith can be put in their conclusions.

January 2010





 
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