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Cities increase the power of thunderstorms by 30 per cent

Two weeks ago, we got drowned here in New York when a flash storm dumped three inches of rain on the city. It doesn’t sound like much, but considering that about 13 million gallons of water flood into the subway on a completely bone-dry sunny day, the additional gallons totally b0rked the system — and the trains ground to a halt, which meant New York ground to a halt.

So I was intrigued to happen upon a recent study claiming that cities actually increase the intensity of storms. Two Princeton engineers gathered a boatload of data about a humongous storm that slammed Baltimore in July 2004, looking at lightning strikes, rainfall, clouds and aerosols. Their conclusion? The structure of the city exacerbated the storm — producing 30 per cent more rainfall than had the storm passed over a piece of nearby non-urban countryside. As they noted in a press release:

Much of the lightning during the 2004 storm wrapped around the western edges of Baltimore and Washington, D.C., to the south. “It’s as if all of a sudden the lightning can ‘feel’ the city.”

Sentient thunderstorms. I love it. Run for your lives!!

Seriously, though, they hypothesize that there’s a bouquet of urban-design-related vectors at play here, including the “urban heat island effect”, which adds energy to a thunderstorm, as well as tall buildings that increase wind drag and provide “boiling action” that boosts rainfall. Pollution, they think, might also increase the yield.


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I'm Clive Thompson, a writer on science, technology, and culture. This blog collects bits of offbeat research I'm running into, and musings thereon.

Currently, I'm a contributing writer for the New York Times Magazine and a columnist for Wired magazine. I also write for Fast Company and Wired magazine's web site, among other places. Email or AOL IM me (pomeranian99) to say hi or send in something strange!

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The “Milky Way Transit Authority” map

Should automobile software be open-sourced?

My Bookforum review of Jaron Lanier’s “You Are Not A Gadget”

Molecular secrets of the “iron-plated snail”

Garry Kasparov, cyborg

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a bunch of stuff

January 31, 2010 » 07:29 PM
V. A. To me death seems to be an evil.
M. What, to those who are al­ready dead? or to those who must die?
A. To both.
M. It is a mis­ery, then, be­cause an evil?
A. Cer­tain­ly.
M. Then those who have al­ready died, and those who have still got to die, are both mis­er­able?
A. So it ap­pears to me.
M. Then all are mis­er­able?
A. Ev­ery one.

January 24, 2010 » 03:22 PM

One of the more interesting trends is family, which came in at number five. Specifically, discussion about family, moms, dads, daughters, etc. jumped during 2009. With Facebook users getting older, this isn’t a big surprise. However, the fact that the mention of “kids” jumped by a factor of five this year is rather dramatic. It’s tough to know what this means, though. (via Facebook Unveils Most-Mentioned Topics of 2009

)

January 15, 2010 » 01:36 PM

BEYOND AWESOME. They are announcing a recall of the Plush Uterus “due to a potential choking hazard for children”. To apply for it, “Please send an email to the address below with the subject line, ‘UTERUS OPT OUT’”.

January 14, 2010 » 10:04 PM

“To order, please TYPE “YES” IN CHECKBOX BELOW TO AGREE YOU UNDERSTAND THIS PLUSH MUST BE KEPT AWAY FROM KIDS (it is a sex organ, after all). If it is not checked, WE WILL NOT SEND THE UTERUS.” (via @ibogost)

January 11, 2010 » 01:45 PM

I watched Space: 1999 back in the day, but I swear to god I do not remember this scene.

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