David Parker is head of climate monitoring at the Hadley Centre.
In 2004, he has published a paper in Nature, showing that the urban heat island effect has not affected the historical temperature record
David Parker (climatologist) – Wikipedia, the free encyclopedia
David Parker, at the Hadley Centre for Climate Prediction and Research in Berkshire, says ultimately, British children could have only virtual experience of snow. Via the internet, they might wonder at polar scenes – or eventually “feel” virtual cold.
Snowfalls are now just a thing of the past – Environment – The Independent
The National Weather Service has observed 7 to 13 degrees UHI effect in Phoenix, but David Parker says that doesn’t influence the temperature record.
The average minimum May temperature at the urban locations displayed an apparent upward increase through the time series (1910 through 2000), which was attributed to the urban growth of the region. By the end of the series, there was a +4 to 7 ºC (7 to 13 ºF) difference between the urban minimum temperatures and the rural minimum temperatures.