Our sea level friends tripled the rate of historical sea level rise over the last twenty years, without any data indicating that anything had changed.
The 1990 IPCC report reported a range of 1.0 to 1.7 mm per year and no evidence of acceleration during the 20th century.
Their graph showed 8-10 cm of rise from 1900 to 1980
www.ipcc.ch/ipccreports/far/wg_I/ipcc_far_wg_I_full_report.pdf
That wasn’t very alarming, so a few years later they bumped the numbers up to 15 cm of sea level rise between 1900 and 1980
That wasn’t alarming enough either, so they bumped the numbers up to 3.1 mm per year, almost triple the 1990 number – without any evidence that sea level rise had accelerated.
CU Sea Level Research Group | University of Colorado
This is typical of the fraudulent activity going on in the climate community.
No matter what they did, they couldn’t show how sea level rise was not accelerating, and had to manipulate the graphs, but from what I can tell, the public isn’t as alarmed as these nutcases.
Take special note of their GIA “correction”.
http://notrickszone.com/2012/06/18/data-show-sea-level-rise-has-slowed-down-over-the-last-7-years/
Corrupt climate scientists do what it takes to keep the money flowing. Saying ‘there is no problem with the climate; everything is following natural cycles’ is not gonna happen.
Holland may notice sea level rise before most. Unfortunately they are not playing ball after a little slight on their country –
http://www.rnw.nl/english/article/sea-level-blunder-enrages-dutch-minister
Steven here’s a nice paper
Rate of Sea Level Rise(SLR): Predictions vs. Measurements
http://www.co2science.org/articles/V15/N31/C1.php
A nice line is –
Boretti writes that the huge deceleration of SLR over the last 10 years “is clearly the opposite of what is being predicted by the models,” and that “the SLR’s reduction is even more pronounced during the last 5 years.” To illustrate the importance of his findings, he notes that “in order for the prediction of a 100-cm increase in sea level by 2100 to be correct, the SLR must be almost 11 mm/year every year for the next 89 years,” but he notes that “since the SLR is dropping, the predictions become increasingly unlikely,”
Can’t be. The experts say that sea level in California will rise 12 inches in the next twenty years. That is 12 inches more than the last twenty years.
Snorkels on in CA
The “experts” have not looked at the tide gauges.
Sea level hasn’t accelerated over the last 20 years. Here’s a presentation, you can find on the AVISO Mean Sea Level References page:
“Why has an acceleration of sea level rise not been observed during the altimeter era? ”
R. Steven Nerem (University of Colorado)
http://www.aviso.oceanobs.com/fileadmin/documents/OSTST/2011/oral/02_Thursday/Splinter%203%20SCI/04%20Nerem%20ostst_2011_nerem.pdf
Here’s a screen shot from that presentation:
http://i39.tinypic.com/nr14bq.jpg
Anybody who tells you the rate of sea level rise is accelerating isn’t telling you the truth.
Acceleration claims are based on modelling exercises. It’s call the “semi-empirical approach”. Although I’m not sure why they call it that, because it’s not so easy to find which part of such claims are actually empirical.
Steven would be nice, since you have the data, to plot the slope versus time for a 20 year sliding window. Looking at the century data I can see the slope being as much at times in the past. Leading to the conclusion that we might be plotting noise.
Sea level is decelerating at 0.035mm/yr^2
http://naturalclimate.wordpress.com/2012/01/30/sea-level-deconstruction/