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Author Topic: Sea level variability over 5 glacial cycles  (Read 2192 times)

Pmt111500

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Sea level variability over 5 glacial cycles
« on: October 18, 2014, 06:29:52 AM »
In the article (behind paywall) http://www.nature.com/ncomms/2014/140925/ncomms6076/full/ncomms6076.html
authors present comparisons between Arctic and Antarctic drill core records and a new dataset they've obtained from bottom of  the Red Sea, the salinity of which (somewhat) complicatedly, conforms to global sea levels.  Further comparisons were made against paleoclimatological Asian Monsoon record. Speeds of the natural sea level rises during changes in the recent Pleistocene could thus be estimated.
 
Eelco Rohling (One of the authors) summarizes their findings at Skeptical Science: http://www.skepticalscience.com/news.php?n=2694

the final chapter is as follows:"But that time has come and, once ice sheets start to melt, the freight train is in motion. It will then keep moving for many centuries to come, no matter how hard we stamp on the brakes."

JimD

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Re: Sea level variability over 5 glacial cycles
« Reply #1 on: March 24, 2015, 04:25:06 PM »
This seemed like a good place for this.  It might be found elsewhere also but I have not seen it.

Global warming is now slowing down the circulation of the oceans — with potentially dire consequences

Quote
...According to a new study just out in Nature Climate Change by Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research and a group of co-authors, we’re now seeing a slowdown of the great ocean circulation that, among other planetary roles, helps to partly drive the Gulf Stream off the U.S. east coast. The consequences could be dire – including significant extra sea level rise for coastal cities like New York and Boston.....

So far, the study finds, we’re looking at a circulation that’s about 15 to 20 percent weaker. That may not sound like much, but the paper suggests a weakening this strong has not happened at any time since the year 900. Moreover, this is already more weakening than scientifically expected — and could be the beginning of a further slowdown that could have great consequences....

Indeed, researchers recently found a sudden, 4-inch sea level rise of the U.S. East Coast in 2009 and 2010, which they attributed to a slowdown of the Atlantic overturning circulation. Rahmstorf says that “for a big breakdown of the circulation, [sea level rise] could amount to one meter, in addition to the global sea level rise that we’re expecting from global warming.”...


http://www.washingtonpost.com/news/energy-environment/wp/2015/03/23/global-warming-is-now-slowing-down-the-circulation-of-the-oceans-with-potentially-dire-consequences/
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jai mitchell

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Re: Sea level variability over 5 glacial cycles
« Reply #2 on: March 24, 2015, 07:32:13 PM »
Probably a good idea for a new thread.
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Neven

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Re: Sea level variability over 5 glacial cycles
« Reply #3 on: March 24, 2015, 08:39:16 PM »
Indeed, a thread was opened, but placed in the wrong category (Arctic sea ice). I've moved it to the Consequences category.
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