Global Land-Ocean Temperature Index

Words on Weather & Climate, by Craig James

February 18, 2010 // 0 Comments

  Climate Data Part 1 It seems as if every time someone digs up anything new about the Intergovernmental Panel on Climate change (IPCC), something ugly crawls out. For example, the Dutch Environmental Assessment Agency has recently discovered the IPCC incorrectly reported that 55% of that country was below sea level and would be flooded by increasing sea levels. The number should only be 20%. There have been many other revelations recently about the IPCC, the committee established to inform the world about climate change, but let’s move on to the two really important issues in climate change. Has this past decade been the warmest decade on record and have the global computer models been forecasting way too much warming? Let’s take a look at how the climate data is obtained and then used to construct this chart from NASA below, which shows global temperatures warming about 1.5 degrees Fahrenheit since 1880. I’ll start first with what is called the United States Historical Climate Network or USHCN. There are currently 1,221 reporting stations in this network with records going back into the late 1800s. A former television meteorologist by the name of Anthony Watts took on the enormous task of having all USHCN climate reporting stations surveyed to determine if they met the National Weather Service criteria for proper siting. Over 80% of the stations have now been studied and almost 90% of those stations failed to meet that criteria. The survey shows that nine out of every ten stations are likely reporting higher or rising temperatures because they are badly sited on or near tarmacs, next to buildings, on paved driveways and roads, in waste treatment plants, on rooftops, near air conditioner exhausts and more. You can read about the survey and see photos of some of the ridiculous locations of thermometers in this pdf: One of my favorite examples is from The University of Arizona showing where the thermometer has recently been placed over pavement in a parking lot. It used to be over grass. Would you think this move might produce higher daytime temperatures? The thermometer shows warming but certainly not from Carbon Dioxide.   Poor current location of thermometers is just one of many problems. Since records began, most thermometers have […]