From your dishonest link:
In that 1997 report, they say clearly that the Global Average Temperature (GAT) was 62.45°F,
based on a 30-year average (1961-1990) of the combined land and sea surface temperatures.
During 2015, the average temperature across global land and ocean surfaces
was 1.62°F (0.90°C) above the 20th century average.
It was blogger
Wattsupwiththat who first noticed and explained the funky math. He explains that the recent report compares 2015 to the 20th century average - but, doesn't mention what that average temperature was.
However, it does give a 20th Century average in its November 2015 State of the Climate Report: - 13.9 degrees Celsius (57 degrees Fahrenheit):
Global Analysis - Annual 2015 | National Centers for Environmental Information (NCEI)
The annual temperature anomalies for
1997 and 1998 were 0.51°C (0.92°F) and 0.63°C (1.13°F), respectively, above the 20th century average
Would be GREAT if you knew WHEN the baseline average mattered. In your 1st claim --- GAT= 62.45degF -- there IS no baseline involved because ----------------------- It's NOT an ANOMALY, it's an actual temperature average.
And your LAST statement of anomalies for 1997 and 1998 don't state what baseline was being subtracted to GET an anomaly. I think you're a bit confused as to when it matters..
Actually you add, not subtract the baseline temperature, which WAS given, so it is YOU who are confused. I made it bigger and bold in the earlier post so you can't miss it this time, but you probably will anyway!
This is the problem with deniers, they pretend not only to be know-it-alls, they claim they know more than even the real scientists!
The link from the post I replied to explains everything, but obviously you understood nothing. The link explains exactly how to derive the temperature from the anomaly in detail, including showing you the math. They do the math for 2015, but dishonestly do not do it for 1997 knowing the deniers they are deliberately deceiving are both too stupid and too lazy to do it themselves for 1997 so they are comparing data using the same baseline.
I will post the math they did on their link for 2015 and then do the same thing for 1997 that you were too lazy to do yourself.
NOAA Butchers Math in Report Claiming 2015 Was Hottest Year Ever
Now, it's math time:
- According to NOAA, the global average temperature for the 20th century was 57 degrees Fahrenheit.
- And the 2015 average was 1.62 degrees Fahrenheit above that average.
- In other words, according to this recent NOAA report, 2015 was the hottest year ever at 58.62 degrees Fahrenheit (57+1.62).
- And, that 1997 NOAA report states 1997 had an average global temperature of 62.45 degrees.
And now it is time for the truth using the same 20th Century average for 1997.
1. According to NOAA, the global average temperature for the 20th century was 57 degrees Fahrenheit.
2. And the 1997 average was 0.92 degrees Fahrenheit above that average.
3. In other words, according to this recent WUWT report, 1997 was the hottest year ever at 57.92 degrees Fahrenheit (57+0.92) when using the same baseline.
4. Therefore when comparing the data using the same baseline WUWT wants you suckers to believe 57.92 is greater than 58.62