Understanding The NOAA Urban Heat Island Adjustment

After considering the effect of expanding urban sprawl, NOAA adjusts all recent temperatures upwards. The exact opposite of what any honest scientist would do,

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4 Responses to Understanding The NOAA Urban Heat Island Adjustment

  1. Mr Grimnasty says:

    The Central England Temperature record has been adjusted slightly for UHI for quite some time now, it’s not enough though – and these are supposed to be a triangle of ‘pristine’ sites.

    The apparent +1C disconnect/step up in the CET data after they went electronic needs a thorough investigation too – or of course there could have just been a natural climate regime shift at the same time!

  2. GCsquared says:

    Something like this happened with SST data. A decline in sea temperatures was blamed on the fact that more buoys were being put into the ocean to measure SST. The explanation was that heat from the ships’ engines biased temperatures a bit upward. The buoys didn’t have this problem. So putting in more buoys was increasing the number of cooler accurate readings, and pulling average temperatures downward over time. Solution: leave the ship measurements alone and adjust the buoys upward.

  3. Andy DC says:

    They have such little credibility that I just automatically assume that any alarmist news is fake news. For all I know, maybe there were a couple of heat records set around the world. But they have cried wolf so often, cherry picked so often and flat out lied so often, why should anyone believe them?

  4. Warren Welsh says:

    National Oceanic and Atmospheric Administration
    The Climate of 1997
    Annual Global Temperature Index
    NOAA Logo
    Please note: the estimate for the baseline global temperature used in this study differed, and was warmer than, the baseline estimate (Jones et al., 1999) used currently. This report has been superseded by subsequent analyses. However, as with all climate monitoring reports, it is left online as it was written at the time.

    The global average temperature of 62.45 degrees Fahrenheit for 1997 was the warmest year on record, surpassing the previous record set in 1995 by 0.15 degrees Fahrenheit. The chart reflects variations from the 30-year average (1961-1990) of the combined land and sea surface temperatures.

    It appears that NOAA were using a base line temperature of 16.91 C prior to 1997 instead of the twentieth century average the 13.90 C used in all subsequent reports which might explain why previous years are not included.
    In the UPDATED list of the ten warmest years contained in the 2016 REPORT they have increased the anomalies (over and above the twentieth century average of 13.90 C), six had been adjusted upwards. ( The anomalies were increased as further data came to hand!)
    2014 by 0.05 C, 2013 by 0.05 C, 2012 by 0.05 C, 2010 by 0.08 C, 2009 by 0.10 C and 2005 by 0.08 C.
    These alterations were the needed to make the upward trend to 2016 appear more credible

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