September 2021 was the second warmest September on record, after September 2020, according to NASA, Copernicus and James Hansen , despite the cooling effect of the current La Niña. Above NASA map shows that the Arctic Ocean was hit severely by high temperatures. The NASA map shows an anomaly of 0.96°C compared to 1951-1980. With COP26 to be held in Glasgow, from October 31 to November 12, 2021, it's important to realize that using the period from 1951 to 1980 as a base is not the same as pre-industrial. So, how much has the temperature risen from pre-industrial and what are the prospects? Will COP26 deliver? [ from earlier post ] Let's do the calculations once more. The trend in the image below indicates that the NASA data need to be adjusted by 0.29°C to change the base from 1951-1980 to 1900. Of course, 1900 is still not pre-industrial. The chart below shows three trends: The green trend is based on unadjusted NASA data (1951-1980 base). The lilac...