In the latest flurry of news from Europe about their summer heat records – has anybody heard the UHI (Urban Heat Island) referred to? Luke Howard who published on the London UHI near 200 years ago would turn in his grave. Even Catallaxy is onto the issue. If anybody notices the UHI referred to in meedja please tell us.
I heard on ABC news an English reporter drop this pearl of wisdom – “it was cooler at the beach than in London.” Ya think!!
There still seems to be research on UHI, for example doi.org/10.1016/j.ufug.2018.01.008. However it is worth noting that record temperatures for example in the UK are predominantly NOT in the urban areas. See here: www.bbc.com/news/uk-49085806 UHI does not explain away global warming.
Cambridge sounds a tad urban to me. From the time in the 1980’s that Prof Jones started publishing global temperature compilations data from near every urban area on Planet Earth was included.
No sceptical group was ever funded to produce an alt version attempted to be UHI free
I helped put all these data together for Eastern Australia.
www.warwickhughes.com/papers/eastoz.htm
results were crystal clear – as populations came down – temperature trends reduced.
The paper you quote about “green areas” within urban areas is not central to the issue that global databases are chocka with data from urban areas. The UHI is at once a most researched phenomena yet most ignored by policymakers. If you have a thermometer recording in a park in a city – assuming that “air still moves!!” breezes & winds still blow – the data will be urban affected.
John,
Your comment contradicts Japanese records which show urban areas having increased at 0.55C for the past century and country areas decreasing at 0.07C for the same time period.
A couple of references for Paris, Warwick:
katerina-mazur.com/?page_id=160
www.thelocal.fr/20190725/heatwave-heat-sink-effect-raises-temperature-in-paris-by-up-to-10c
realclimatescience.com/2019/07/mindless-heatwave-hysteria/
A figure of UHI profile of Paris (in the right-hand column) can be found here
www.nasa.gov/topics/earth/features/heat-island-sprawl.html
Cheers and good luck, JB
“UHI does not explain away global warming” possibly not but there are multiple other factors that when combined may well do so? A couple of examples, in Australia at least we see the cooling of past maxima a la ACORN and the adoption of undampened, AWS measured data which can record transitory temperature spikes as credible data.
Remember four months ago you reported on the UKMO study showing there could be 1.7 degrees UHI warming in UK wide minimum temperatures.
UKMO on UHI
www.warwickhughes.com/blog/?p=6163
Anthony Watts compares temperature trend from USCRN with that published by NOAA/GISS. Effectively rural cf urban/semi-urban.
wattsupwiththat.com/2019/07/30/hidden-noaa-temperature-data-reveals-that-6-of-the-last-9-months-were-below-normal-in-the-usa-and-noaa-cant-even-get-june-right/
Anthony Watts is reporting another dodgy Euro site
wattsupwiththat.com/2019/08/01/poorly-sited-weather-station-leads-to-a-fake-record-high-in-germany/
Also – JoNova reports another retired climate scientist speaks out against the prevailing AGW dogma – this time from NOAA
joannenova.com.au/2019/08/how-many-silent-skeptics-are-there-at-noaa-dr-rex-fleming-speaks-out-after-years-of-working-there/