Scientists Discover The Urban Heat Island Effect

Human activities and the built environment trap heat and prevent cities from cooling down, said UCLA geography professor Dennis Lettenmaier.

“Everything’s warming up, but the effect is amplified in urban areas,” Lettenmaier said after studying  217 urban areas across the globe and finding that prolonged periods of extreme heat increased significantly in 48 percent of them between 1973 and 2012.

The findings, published in the journal Environmental Research Letters, show that about only 2 percent of those urban areas experienced a significant decline in heat waves. And the change was more dramatic at night: Almost two-thirds of the urban areas showed significant increases in the frequency of extremely hot nights.

Climate: Urban areas amplify global warming impacts | Summit County Citizens Voice

Scientists have discovered a huge increase in UHI since 1973, yet USHCN makes essentially no adjustment in post 1973 temperatures.

ScreenHunter_6674 Feb. 01 23.16

And why did the author cherry-pick 1973 as the start year? Because it was right at a local minimum. Had he started in almost any prior year, it would have wrecked his story.

ScreenHunter_6638 Feb. 01 09.02

These academics spend months writing a paper completely full of crap, on a topic which it takes 10 minutes to write an informative blog post about.

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14 Responses to Scientists Discover The Urban Heat Island Effect

  1. Daavid A says:

    How to amplify UHI. Reduce the number of stations by about 90 percent, and then spread the warming in the city stations 1200 K, while ignoring valid stations that do not show the warm anomaly.

    • Streetcred says:

      Better still, reduce the rural stations and then smear the UHI from the city stations to the rural areas. Silly me, they’re doing that already!

  2. Aard Knox says:

    The much-maligned Melbourne weather station has been replaced by one in parkland east of the city. The Melbourne Age which actively promotes CAGW admits in the very last paragraph of this report that the new station is showing lower temperatures.
    http://www.theage.com.au/victoria/melbourne-weather-summer-2015-still-hot-just-last-year-was-hotter-20150119-12tbhi.html

    • Robertv says:

      “an average 1.2 degrees cooler,”

      So without the adjustments the Earth is cooling.

      • Streetcred says:

        No adjust all of the Melbourne city data downward for the increasing UHI using the park site as the reference … UHI increases with development in time so this should be interesting.

  3. ren says:

    Winter forecast for Europe and the north-east America. 15 km polar vortex.

  4. Dave N says:

    I think it’s called the Berwyn effect

  5. Eliza says:

    Superb posting keep it up

  6. Gail Combs says:

    In looking at that ‘Adustment’ Graph I note the adjustment GOES NEGATIVE after about 1980 …. WTF!?!

  7. gator69 says:

    Please, won’t you send money today?

    Dyscalculia is difficulty in learning or comprehending arithmetic, such as difficulty in understanding numbers, learning how to manipulate numbers, and learning facts in Mathematics. It is generally seen as a specific developmental disorder.

    Dyscalculia involves frequent difficulties with everyday arithmetic tasks like the following:

    Difficulty reading analog clocks
    Difficulty stating which of two numbers is larger
    Inability to comprehend financial planning or budgeting, sometimes even at a basic level; for example, estimating the cost of the items in a shopping basket or balancing a checkbook
    Difficulty with multiplication-tables, and subtraction-tables, addition tables, division tables, mental arithmetic, etc.
    Difficulty with conceptualizing time and judging the passing of time. May be chronically late or early
    Problems with differentiating between left and right
    Inability to visualize mentally
    Difficulty reading musical notation
    Difficulty navigating or mentally “turning” the map to face the current direction rather than the common North=Top usage
    Having particular difficulty mentally estimating the measurement of an object or distance (e.g., whether something is 10 or 20 feet (3 or 6 meters) away).
    Inability to grasp and remember mathematical concepts, rules, formulae, and sequences
    Inability to concentrate on mentally intensive tasks

    http://en.wikipedia.org/wiki/Dyscalculia#Other_problems

    I wonder if it is contagious? I mean all those meetings could be a breeding ground for this mass developmental disorder we are witnessing.

    • NielsZoo says:

      It’s obviously a job requirement for a climate “scientist” to possess the trait dyscalculia. If not, adequate experience and clinical datcalculia or d’othercalculia will be accepted. Dyslexia will be considered as an additional qualification when working with inverted graphical data.

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