Monday, September 30, 2024

No safe place

Asheville is over 2,000 feet above sea level, and ~300 miles away from the nearest coastline. No place is safe from climate change.

We all suffer the consequences. We must all take action. We are all in this together.

https://www.threads.net/@luckytran/post/DAgoruCgirK/?xmt=AQGz5klLMbevFSEgBCAsiU5xL6helFGrpwGG7vnD6u5EyA
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Water

If you want to understand the horror still unfolding in Appalachia, and actually if you want to understand the 21st century, you need to remember one thing: warm air holds more water vapor than cold.

As Hurricane Helene swept in across a superheated Gulf of Mexico, its winds rapidly intensified—that part is really easy to understand, since hurricanes draw their power from the heat in the water. And as Jeff Masters points out:

Helene’s landfall gives the U.S. a record eight Cat 4 or Cat 5 Atlantic hurricane landfalls in the past eight years (2017-2024), seven of them being continental U.S. landfalls. That’s as many Cat 4 and 5 landfalls as occurred in the prior 57 years.

But Helene also picked up ungodly amounts of water—about 7% more water vapor in saturated air for every 1°C of ocean warming. In this case, that meant the mountaintops along the Blue Ridge above Asheville were—according to Doppler radar measurement—hit with nearly 4 feet of rain. That meant that Asheville—listed recently by the national media as a “climate haven” and bulging with those looking for a climate-safe home—is now largely cut off from the world. The interstates in and out of the town were severed for a while over the weekend; the beautiful downtown is drowned in mud. It’s obviously much worse in the outlying towns up in the surrounding hills. People forget how high these mountains are—Mt. Mitchell, near Asheville, is the highest point east of the Mississippi (and, worth noting, the forests on its summit slopes have been badly damaged by acid rain)... Bill McKibben

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