You made reference way - up - thread @ 81 to a graph of Church & White
tidal gauge data presented in a Rahmstorf video presentation, so it is more Church & White than Rahmstorf, but is it what you mean?
If we looked at only the raw
tidal gauge data for Juneau, you would have us believe that sea level was rapidly falling, and probably accelerating in it's drop, yet in reality it's not the sea level that's falling, but rather the land that is accelerating in its rise.
The authors needed to perform data analysis on
tidal gauge data in order to know whether or not sea level rise was accelerating, therefore sea level rise can not be eyeballed.
Over the period where the two datasets overlap, there is good agreement between sedimentary records and
tidal gauge data (Donnelly 2004, Gehrels 2006).
Tidal gauge data shows a slow and steady approx. 1.8 mm per year rise.
And using Church & White
tidal gauge data (which today only runs to 2013 but AR5 had data to 2009), the final years are running above 4mm / yr while such 11 - yr trends calculated through the full record never top 3mm / yr.
Finally, as we discuss here, there are a number of problems with
the tidal gauge data, so even that estimate of a 1 foot rise every 100 - 300 years is probably an overestimate.
Your «Oceans» image shows raw
tidal gauge data for certain cities around the world, and you claim that sea level rise and acceleration are disproved by those few gauges.
Despite the various problems with
the tidal gauge data, it is possible that the various estimates of global sea level trends of 1 - 2 or maybe 2 - 3 mm / year might coincidentally be correct.
Not exact matches
After the Japan earthquake, seismic stations, deep - ocean buoys and
tidal gauges delivered a wealth of
data for accurate tsunami forecasts in Hawaii, California and the rest of the Pacific Rim, but public preparedness can be even more important
«The shock for us was that
tidal flooding could become the new normal in the next 15 years; we didn't think it would be so soon,» said Melanie Fitzpatrick, one of three researchers at the nonprofit who analyzed tide
gauge data and sea level projections, producing soused prognoses for scores of coastal Americans.
Moreover, we also have argued elsewhere that linear trends should be treated cautiously when the
data shows non-linear trends, as many
tidal gauges do.
As you become interested in IPCC AR5 Fig 3.14, do note that the three
data sets presented are derived from
tidal gauges using two significantly different approaches.
Furthermore, you complain about climate scientists not going «back and check the input
data» when you yourself failed to do so with regard to the
tidal gauges you were touting.
The overall trend discerned from the tide
gauge data, according to Wolfgang Scherer, Director of Australia's National
Tidal Facility, remains flat.
With respect to Church et al 2008, you're neglecting to mention (or perhaps didn't read enough of the paper to notice) is that, unlike you're «eyeballing» method, they actually adjusted
tidal gauges for changes in local land elevation before drawing any conclusions from unadjusted
data.