"There were just 26 stations in 1880, only 4 in the southern hemisphere. Even in 1900, the 664 global stations was on 2.8% of the number in 2000.
Temperatures over oceans, which covered 71% of the globe, were measured along shipping routes mainly in the Northern Hemisphere erratically and with varying measurement methods. Despite these shortcomings and the fact that absolutely no credible grid level temperature data existed over the period from 1880 to 2000 in the Southern Hemisphere’s oceans (covering 80.9% of the Southern Hemisphere), global average surface temperature data estimation and publication by NOAA and NASA began in the early 1990s."
Dr. Mototaka Nakamura: The supposed measuring of global average temperatures from 1890 has been based on thermometer readouts barely covering 5 per cent of the globe until the satellite era began 40-50 years ago. “We do not know how global climate has changed in the past century, all we know is some limited regional climate changes, such as in Europe, North America and parts of Asia.” This makes meaningless the Paris targets of 1.5ºC or 2ºC above pre-industrial levels.
WMO cites media as source! The WMO website itself is citing the media as its source, writing: “Media reports say that researchers logged a temperature of 20.75°C. Mr Cerveny cautioned that it is premature to say that Antarctica has exceeded 20°C for the first time.”
Thermometer data show only 16°C! But according to German Facebook site Klima.Wissen here and its readers, the “all-time record high reading appears to have its origins from the AFP news agency. It was then picked up by the always climate sensational The Guardian. But now the whole story is beginning to appear as just big sensational hoax.