A new study by Dr. David Parker at the Hadley Center for Climate Prediction and Research opposes theories that deny the global warming phenomenon. Skeptics rely on the urban heat island theory, maintaining that the majority of climatic records are made near cities, which produce their own heat. For them the global warming recorded in recent years would be only the reflection of urbanization.
However the study commissioned by the British Met Office and published in Nature, seems to invalidate the theory of the urban thermal island. Dr. David Parker has used climate data over the last fifty years to create two graphs: one tracing the temperatures of calm nights and the other of windy nights. According to him, to admit the validity of the theory of the island of heat is to find traces of temperatures much higher during calm nights than windy nights, since the wind blows the excess of heat out of the cities. However, the curves are identical and show an average increase in nighttime temperatures of 0,19.C per decade between 1950 and 2000. Dr. Parker adds that the warming of the oceans is another witness to the global warming of the planet.
Leading experts such as Myles Allen, a member of the Department of Atmospheric Physics at Oxford University, say they are convinced by the Met Office's argument. American Fred Singer, president of the Virginia Science and Environmental Policy Project, is one of the leaders of the skeptical movement and defends himself by saying that only indirect temperature readings should be used to analyze current climate trends. Indirect temperature readings include the study of wood rings, stalactites, fossils, ocean sediments and so on. It accuses proponents of the global warming theory of being selective in the use of climate data to show a worrisome trend of temperature changes
Source: Press release, BBC News, 18 / 11 / 04 Government News Network