Vast,
More and more of the collection sites for temperature are in metro areas. These are notorious heat sinks. Is that data all rounded down? Over 80% are in areas that don't meet NOAA's standards for collection sites. Most are due to heat sources being too close.
Really? What right-wing site did you find this talking point on?
Perhaps you would be so kind as to illustrate your point by providing us with a chart listing locations for various temperature readings?
Otherwise you are speaking from your posterior region.
"According to the U.S. government, a surface station must be at least 100 feet away from a heat source/sink to be considered reliable. Using the goverment's own standards for properly locating temperature sensors, Watts graded each site on a scale from 1 to 5. A grade of 1 or 2 indicates reliable placement. A grade of 3 to 5 can result in temperature errors of several degrees, according to the governments own studies.
To date, the investigation has noted that only 3 percent of the stations surveyed were grade 1. Roughly 8 percent were grade 2,
meaning only 11 percent of the stations are located in a manner that results in reliable temperature data.
Some 20 percent of stations were grade 3, the majority were grade 4 (58 percent), and 11 percent were graded as 5."
"The adjustments also help to 'fix' the gaps in the missing data, there is an adjustment for the new MMTS instrumentation, an adjustment for station moves, and time of observation.
These adjustments amount to a net 'warming' that is applied to the 'raw' data."
Is The U.S. Temperature Record Reliable? - wbztv.com
I thank you for having me look up some old sources. I ran across this new one:
Global Warming Science and Public Policy - U.S. Temperature Rankings Rearranged, Problems and Concerns with Temperature data sets
"But last week (week of August 16,2007), a problem popped up. Researchers Steve McIntyre (
A New Leaderboard at the U.S. Open Climate Audit) and Anthony Watts (
Watts Up With That?: 1998 no longer the hottest year on record in USA) noticed that there seemed to be an unusual discontinuity—a step upwards—in the temperature records from many of the individual stations that went into the GISS U.S. national aggregate.
Upon carefully documenting this apparent discontinuity and inquiring to the record keepers at GISS about it,
it was determined that GISS had accidentally incorporated a data error in their routines aimed at updating and compiling individual station histories as well as the U.S. national temperatures.
After adjusting their procedure to account for this problem, NASA GISS has now made available a new and improved temperature history of the United States. In this more accurate record, the year 2006 now drops to the 4th warmest year of all-time, a full 0.12ºC behind the new sole record-holder, 1934. In the new dataset, only three of the past 10 years are included among the top-10 warmest years of all-time in the United States."
It would be appreciated if you would keep the discourse civil VastLWC. Also, I tire of doing your homework. You will have to refute my statements with your own sources in the future.