JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Feast your eyes on Streaky Bay’s thermometer — over bitumen for 31 long hot years

Ken Stewart rates the Streaky Bay site as one of the worst he has seen  This is an influential site because it’s in a remote area, is used to “correct” official ACORN sites, and has been running for a long time. Last October the BOM finally moved it to a completely new (and much better site) – only three decades too late.  Strangely, they didn’t give the new site a new station number? Normally the old and new sites would be run concurrently with two different numbers so the data from both could be compared and the differences in temperature between them could be worked out. Is that an accident? Does it hide the terrible quality of the previous site?

The Streaky Bay information (site 018079) tells us it opened in 1865 but the site only has monthly data from 1926 and daily data from an even shorter period. The rest presumably hasn’t been digitized yet. As best as I can tell, the station metadata appear to mark this site as being at the post office from 1865 to 2018, and record the ground cover as becoming asphalt in July 1987. That means for 31 years the Australian Bureau of [...]

China is warming fastest where the cities are, not where the models predicted – classic UHI

The biggest changes in temperature (“divergence” in dark red brown Fig 6) occurred where the most people lived (blue dots). In the 60 years to 2010 China was reported to have warmed by 0.79 ± 0.10 °C. However Scafetta et al calculate at most, China could have experienced a real warming of only 0.46 ± 0.13 °C.

Somehow the combined might and supercomputers at NOAA, NASA, Hadley and the Bureau of Met experts all missed this.

It’s another third of a degree gone from the Glorious CO2 Narrative. Just like that.

Fig. 6. Map of the divergence (ΔTMin − ΔTMax) between the warmings registered by the minimum and maximum temperature records (CRU TS4) between 1945 and 1954 and 2005–2014. The cyan dots indicate the 200 most populated cities in China according to the Free World City Database. (White regions over India and the ocean indicate missing data).

Is there a  more perfect nation to study the Urban Heat Island effect than China?

The worlds most populous nation has made a blistering transformation in two decades. As recently as 1995 the population was 75% rural. Now it’s approaching 60% urban. Shenzhen, which is near Hong Kong, grew from 3000 people in 1950 to more than 10 [...]