By Paul Homewood
h/t AC Osborn
Jo Nova has the latest example of temperature shenanigans in Australia:
Friday April 19th set more records than anyone realized. Not only was it the earliest recorded snowfall at Bluff Knoll, but it was also the coldest ever April day in Albany and many other towns in south-west Western Australia. It may also be the largest single day temperature mystery I’ve ever seen in the official “raw” data.
Days like the 19th are extremely unusual in Western Australia — it’s a state that often doesn’t get any snow all year and when it does, the length of the entire snow season is measured in hours. So you might think the million-dollar-a-day Bureau of Meteorology would be paying extra attention. Instead it appears they have lost that day’s data in Albany, despite having two thermometers there to record it. One station is in the city itself and there’s an official “expert” ACORN station at the airport about 10km away.
Luckily Chris Gillham, unpaid volunteer, was watching the live half hour observations roll in at and saw that thermometers at the airport recorded a maximum of only 10.4°C at 11am that day, which he remarks is the lowest April maximum the BOM has ever recorded there. Strangely, the 10.4°C seems to have disappeared. Somehow, the BOM has estimated that April 19th in the city of Albany was 25.1°C on Friday April 19th, which is what is now entered as “raw data” in their Climate Data Online. This is despite temperatures in almost all the surrounding towns being similarly low, and often lowest ever records (for April) as well.
This single day’s omission is so large, it raises the monthly average of Albany Airport by 0.7°C— that’s equivalent to 70 years of “global warming”. Chris reports below that the airport thermometer was also missing four days following Good Friday, which were reasonably cool (according to the City thermometer). He estimates that if the airport thermometer had worked, the official monthly average would have been nearly a whole degree, or 0.9°C cooler than what was officially recorded. (Jo, meanwhile, wonders if any planes took off at Albany Airport over Easter and whether they missed having weather data?).
Full story here.
via NOT A LOT OF PEOPLE KNOW THAT
May 5, 2019 at 07:49AM
Iowa Climate Science Education 