"Between 1764 and 1767 William Hutchison, a mariner who was then Harbour Master at Liverpool in England, carefully recorded the times and heights of high tide at the Liverpool Old Dock...
After the Intergovernmental Panel for Climate Change was formed in 1988 successive IPCC technical committees carefully examined the PSMSL tide gauge data as the computer climate models were predicting the acceleration of sea level rise.After all, a discovery of sea level acceleration would provide additional evidence of increased global warming due to rising carbon dioxide levels and proof of anthropogenic climate change.
Alas! Alas!
There was almost a level of disappointment in the early IPCC reports.
Despite all their efforts the committees in 1990 (13 experts), 1995 (24 experts) and 2001 (36 experts) stated that they could find no acceleration of sea level rise in the 20th century despite the rise of CO2 during that time.
‘There is no firm evidence of acceleration in sea level rise during this century’, said the IPCC Report of 1990 (Chapter 9, p.262).
All of this was to change in 2007...
...This was the first IPCC meeting when satellite-based sea level rise data were available.
...Without any detailed analysis of the discrepancy between tide gauge data and satellite data, this IPCC committee concluded the satellite data was more reliable.
This was a false ‘eureka’ moment with a spurious conclusion that the higher readings of the satellite were proof that sea level rise throughout the 20th Century had suddenly changed from a steady rate of 15-18 cm/100 years to a rate of 30 cm/100 years in the 1990s..."
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