After surveying 70% of the 1,221 weather monitoring stations in the US, Anthony Watts of the Watts Up With That website, finds that the temperature record is “unreliable”. In addition, about 90% of the stations are sited poorly, such as being surrounded by asphalt parking lots which act as heat islands. The result is that most stations are reporting “higher or rising temperatures” due to poor siting alone according to Watts.The weather stations are supposed to meet certain criteria and are part of a weather monitoring program run by NOAA. The network is called the United States Historical Climatology Network or USHCN.Since there is this warming bias in the US temperature record, there is may be one in the world temperature record also.The US surface temperature record is one indicator which is used as a basis for making claims about global warming. Orbiting satellites can also provide data which can be translated into temperatures.Anthony Watts and his...(Read Full Post)