NASA’s James Hansen adjusts Manhattan Central Park temperatures upwards, to account for UHI cooling caused by the grass. (No this is not a joke)
I spent a hot day in Central Park yesterday, and last night was 3 degrees warmer there than the place I was staying in White Plains, NY.
NASA is well aware of the fact that Manhattan is much warmer than surrounding areas, as shown in this 2009 report – which they have recently deleted from their web server.
The report was originally located at this URL
NASA has deep-sixed the paper, but you can still find it at