Sea-Level Acceleration Based on U.S. Tide Gauges ...

[Questioning_Climate]

A new paper on sea level counters the claims of the IPCC et al.

Quote:HOUSTON, J.R. and DEAN, R.G., 2011. Sea-level acceleration based on U.S. tide gauges and extensions of previous
global-gauge analyses. Journal of Coastal Research, 27(3), 409–417. West Palm Beach (Florida), ISSN 0749-0208.

Without sea-level acceleration, the 20th-century sea-level trend of 1.7 mm/y would produce a rise of only approximately
0.15 m from 2010 to 2100; therefore, sea-level acceleration is a critical component of projected sea-level rise. To determine
this acceleration, we analyze monthly-averaged records for 57 U.S. tide gauges in the Permanent Service for Mean Sea
Level (PSMSL) data base that have lengths of 60–156 years. Least-squares quadratic analysis of each of the 57 records
are performed to quantify accelerations, and 25 gauge records having data spanning from 1930 to 2010 are analyzed. In
both cases we obtain small average sea-level decelerations. To compare these results with worldwide data, we extend the
analysis of Douglas (1992) by an additional 25 years and analyze revised data of Church and White (2006) from 1930 to
2007 and also obtain small sea-level decelerations similar to those we obtain from U.S. gauge records.

Full paper here:
http://www.jcronline.org/doi/pdf/10.2112...10-00157.1

[Sunsettommy]

ANOTHER science paper concluding that there are NO sea level increase's to worry about.

Satellite data shows that sea level rise is slowing down.

Science Research say the sea level rise is slowing down very slowly over many decades time frame.

Media and environmentalists groups say that sea level rise is accelerating.

Which group is more credible?

[Questioning_Climate]

As you'd expect, the alarmists are not happy with that and are using a 'correction' on the satellite data to try to remove the deceleration:

http://wattsupwiththat.com/2011/05/05/ne...do-now-up/

Quote:One important change in these releases is that we are now adding a correction of 0.3 mm/year due to Glacial Isostatic Adjustment (GIA), so you may notice that the rate of sea level rise is now 0.3 mm/year higher than earlier releases. This is a correction to account for the fact that the global ocean basins are getting slightly larger over time as mantle material moves from under the oceans into previously glaciated regions on land. Simply subtract 0.3 mm/year if you prefer to not include the GIA correction.

People are still not taking on board that it is not a linear rise, even though Willis Eschenbach has started to use polynomial fits to the data:
http://wattsupwiththat.com/2011/01/08/pu...eleration/
and more here:
http://wattsupwiththat.com/2011/05/02/oh...ted-again/

You'll recall I used a sine fit in my analysis some time ago and found it a much better fit than linear and as good as the Willis Eschenbach polynomial. However, a sine fit has a potential predictive skill, and the possibility of a theoretical mechanism; that is unlikely to be present with a polynomial. Willis Eschenbach has not given the degree of polynomial used on the graph.

My analysis is available here:
http://www.trevoole.co.uk/Questioning_Cl...o_Rise.pdf

[Sunsettommy]

It is suspicious that a correction was needed,only after it was shown that the sea level rise was slowing down.

Similar to James Hansen's GISS temperature data manipulations.It is ALWAYS upward.