Freedman: 'No one has attempted to rebut how 3 independent centers, JMA, NASA, NOAA all came to same conclusion on surface temps… giant conspiracy!'
Meteorologist Anthony Watts rebuts: 'Andrew, they all use the same base surface data. The Global Historical Climate Network (GHCN) from NOAA’s NCDC...They all agree because they only have one data source. Therefore, they are NOT independent as you claim.'
Climatologist Dr. Roger Pielke Sr. weighs in: 'The raw surface temperature data from which all of the different global surface temperature trend analyses are derived are essentially the same. The best estimate that has been reported is that 90 – 95% of the raw data in each of the analyses is the same (P. Jones, personal communication, 2003). That the analyses produce similar trends should therefore come as no surprise. Indeed, this overlapping of raw data between different analyses of multidecadal surface temperature trends is an issue which has not received adequate scrutiny with respect to the value added of more than one analysis.'
Spencer: 'I claim 2014 won’t be the warmest global-average year on record...if for no other reason than this: thermometers cannot measure global averages — only satellites can. The satellite instruments measure nearly every cubic kilometer – hell, every cubic inch — of the lower atmosphere on a daily basis. You can travel hundreds if not thousands of kilometers without finding a thermometer nearby.'
'The thermometer network is made up of a patchwork of non-research quality instruments that were never made to monitor long-term temperature changes to tenths or hundredths of a degree, and the huge data voids around the world are either ignored or in-filled with fictitious data.'
RSS was originally supposed to provide a quality check on our product (a worthy and necessary goal) and was heralded by the global warming alarmist community. But since RSS shows a slight cooling trend since the 1998 super El Nino, and the UAH dataset doesn’t, it is more referenced by the skeptic community now. Too funny.
We are arguing over the significance of hundredths of a degree, which no one can actually feel. Not surprisingly, the effects on severe weather are also unmeasurable …despite what some creative-writing “journalists” are trying to get you to believe.
Another month, another global heat record broken: Last month again set a new mark for global heat. And meteorologists say Earth is now on pace to tie the hottest year ever recorded, or more likely, to break it. The National Oceanic and Atmospheric Administration announced Monday that last month the globe averaged 60.3 degrees Fahrenheit (15.72 degrees Celsius). That was the hottest September in 135 years of record keeping. It was the fourth monthly record set this year, along with May, June and August.
"It's pretty likely" that 2014 will break the record for hottest year, said NOAA climate scientist Jessica Blunden.
As at the end of September, RSS is only ranking 7th hottest since 1998, and UAH tie 3rd. On both datasets, 1998 and 2010 were much, much warmer, and in both cases this year’s temperature is barely above last year’s (0.01C and 0.02C for RSS and UAH respectively).
The whole idea that we can measure global temperatures by any method to such small margins is, of course, a nonsense. Nevertheless, satellite monitoring does not have the substantial issues of UHI and minimal coverage which surface datasets have.