Slashdot Mirror
Sea Level Rise in the SF Bay Area Just Got a Lot More Dire (wired.com)
An anonymous reader writes: San Francisco Bay Area residents have long been aware of the threat that sea level rise poses to their coastal existence -- but things suddenly look a lot more serious. A new study examines the simultaneous phenomena of rising sea levels and subsiding coastal land, and as Wired reports, the situation is pretty dire. Models that factor in just sea level rise predict that at least 20 square miles could be underwater by 2100. Once you add in subsiding land, that jumps to nearly 50 square miles, and could get as bad as 165 square miles. Or, put another way, by the end of the century, half of the runways and taxiways at San Francisco Airport could be submerged.
The study found that most of the Bay's coastline is sinking at a rate of less than 2 millimeters a year -- and while that may not sound like a lot, the millimeters can add up fast. "You talk to someone about, 'Oh the land is going down a millimeter a year,' and that can be kind of unimpressive," says William Hammond, a researcher at the University of Nevada Reno who studies subsidence (but was not involved in this particular project). "But we know as scientists that these motions, especially if they come from plate tectonics, that they are relentless and they will never stop, at least as long as we're alive on this planet."
The study found that most of the Bay's coastline is sinking at a rate of less than 2 millimeters a year -- and while that may not sound like a lot, the millimeters can add up fast. "You talk to someone about, 'Oh the land is going down a millimeter a year,' and that can be kind of unimpressive," says William Hammond, a researcher at the University of Nevada Reno who studies subsidence (but was not involved in this particular project). "But we know as scientists that these motions, especially if they come from plate tectonics, that they are relentless and they will never stop, at least as long as we're alive on this planet."
And we will get the Water to Pay for it!
If something is so important that you feel the need to post it on the internet... It probably isn't that important.
How will rising sea levels kill millions? These changes don't happen overnight and can be countered with dykes and pumps. However, increased temperatures increase storm frequency and intensity and these may lead to much larger storm surges. This is what may kill millions. Rising sea level change is just a drop in the bucket in comparison.
Also, how will you 'solve' climate change? Do you really think reducing CO2 output will be enough? I live in the Netherlands, we have been building massive fortifications against storm surges for the past 50 years. I suggest other countries that are at risk will do the same. Betting on magically solving climate change (which may or may not be possible) might work, but increased water barriers will definitely work.
Plus they are not accounting for the fact that clean coal is a game changer and will result in major reductions in greenhouse gasses.
The American way of life is doomed. It cannot continue as it is. We've passed the tipping point of recovery.
One side here wants to do everything we can to mitigate the problems associated with the change and make as painless as possible.
The other side just ignores it, calls it a Liberal Hoax or Chinese Hoax, thinks if there is a problem but so what it's natural and Jesus will save us. In the meantime life and business as usual. The shock they will experience will devastate them.
Plan for the worst; hope for the best - Winston Churchill.
Yeah, I'm going to have to side with the GP here, on a number of points:
Netherlands
Length of Coastline - 1,914 km
GDP - $770 billion
GDP / km of Coastline - $402 million / km
USA
Length of Coastline - 133,312 km
GDP - $18.57 trillion
GDP / km of Coastline - $139 million / km
So, firstly, the cost to build dykes around the coast of the US would be, proportionally, about 3 times as expensive for them as it is for the Netherlands. Secondly, close to 2 orders of magnitude (well 70 times) more dykes would be required. Thirdly, you keep going on about storm surge being more pertinent than sea level rise, and while technically you're correct here the effects happen to be cumulative.
In fact, in addition to being cumulative, since storm surge is driven by storms (duh) and storms derive their strength from sea temperatures as sea level rises due to warming so to does the size of the storm surge.
I can't really be bothered to go deeply into the topic of materials, as I'm hungry, but again, unless you want to incur unsustainable upkeep costs for those dykes concrete is pretty much the only long term option available - and even then the upkeep will be merely astronomical. And, like the GP says, producing that quantity of concrete, if there's even enough of the right type of sand to make it all, would only exacerbate the problem.