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Ed in Houston

Ueban Heat islands

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Ed in Houston

 

Climate Central released a report on Wednesday, July 14, detailing how the group's scientists and researchers created an index to evaluate the intensity of urban heat islands and then applied it to 159 cities across the nation. In the top five, New Orleans, Newark, New York City, Houston, and San Francisco scored as having the most intense urban heat islands, ranging from 7 to 9 degrees Fahrenheit higher on average.

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https://www.accuweather.com/en/weather-news/how-these-5-cities-became-the-most-intense-urban-heat-islands/981815

Ed in Houston

 

Edited by Ed in Houston

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UK_Palms

I would have thought that NYC would be well on top, due to the sheer size of the city and it's population density. I find it hard to believe that New Orleans and Newark would have greater UHI influences. I would also expect somewhere like NYC to have an UHI influence of at least 10F, similar to London. Both NYC and London have city populations of around 9 million, although NYC has an even bigger metropolitan region of 20 million, compared to London's 18 million. So I'm not sure how the Big Apple's UHI can be 3F lower than London's. They have to be understating it, surely.

I'm also surprised that a city the size of Los Angeles doesn't make the top 5. You would think that NYC and LA would be leading the UHI figures by a long way, given their mammoth populations and concrete jungles. The same can be said for Chicago as well. I have to say that I am slightly sceptical of the findings. New Orleans having a 2F greater UHI than NYC is like saying that Portsmouth's UHI is 2F warmer than London's. That's just impossible. Perhaps there's more to it, but I am sceptical of those results.

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Ryland

I think there’s just more to it. Physical geography and the overall climate are factors, and some of these cities have very varied physical geography and topography in particular.

Urban structure, for lack of a better word, is significant. Los Angeles is broadly speaking an enormous city of detached houses spread over many miles, whereas those mentioned often include much more high density housing. The outlier is Houston, but it is truly enormous and in a very different climate from LA.

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oasis371

UK_Palms,  I am not that far from Newark as the crow flies as they say, but I am always amazed by the elevated temps in Newark compared to my own "green" zone of vegetation.  Betting that there is more green in NYC than Newark as well.  All I know is that the crazy hot, summer high max and max. min temps always seem to be in Newark.  Urban planning needs to include more green space to mitigate this very real phenomenon. 

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Jimhardy

Heat Islands.....global warmings illegitimate little brother.

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Silas_Sancona
On 8/31/2021 at 1:03 PM, oasis371 said:

  Urban planning needs to include more green space to mitigate this very real phenomenon. 

Couldn't agree more..  ..and by green space, i don't include " lets build more Golf courses " That's the last thing green space areas should be used for,  esp. here in the desert / 80+% of the Western U.S.  lol..   

Here in the desert, while all areas are warming steadily ( doubters can look up all sorts of valid info on the subject on their own ),  UHE effect is definitely real.  It surprised me that, for example, the roof on the house i lived in  in Bradenton ( FL ) was sealed w/ a white, reflective coating.. yet here, you don't see much of that, not yet anyway..  Tide is starting to turn on the " adjusting for UHE / Climate Change " challenges..

More and more people are demanding that much more be done to address such issues..  and voting out anyone / everyone who ignores the obvious ..or feels tackling such issue(s) are too expensive..  

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