This post may update as more information becomes evident.
Well, I’ve got all the data on a spread sheet from PSMSL tidal gauges. To review, I’ve used only stations that didn’t have more than one year missing from the annual data from 1981-2008. Originally, I wanted the last 30 years. 1981-2010. Sadly, the coverage sucked, so I moved back to 2009. The coverage was still lacking so I moved back to 2008. The coverage still sucks. Each point represents a tidal gauge. (the colors are vaguely associated with coastal codes.)
There are 177 individual stations. PSMSL divides the stations up by a coastal code(henceforth referred as CC). I don’t agree with the way they’ve divided the data, and will come up with what I believe will be more appropriate. Of the 177 stations, there are 43 PSMSL’s coastal codes are represented. When viewed using the CCs, the mean is 2.016mm/yr. However, some of the CCs are only represented by one tidal gauge in the data set. 14 to be precise. And some of them are pretty dubious. For instance, POTI (lol, no I didn’t make that up) lat 42.16667 long
Probably just coincidence, but the recent blathering about pH levels followed a line from Hawaii to Alaska as part of the study. Hawaii comes in 1.76mm/yr, but the coasts of Alaska with 7 data points comes in at -5.74mm/yr. Warming salt water expands, but it also outgases CO2, while cooling contracts while retaining CO2……. correlation? The entire NA west coast shows a decrease in sea level with a CC average of -2.64mm/yr. The NA east coast shows a rise of 3.5mm/yr, (there are questionable locations) but the entrance to the St. Lawrence shows a -5.2mm/yr.
Another interesting coincidence. The insidiously vapid thought behind the Glacial Isostatic Adjustment originated in Scandinavia. There are 3 different CCs in that area. CC 40, 50, and 60. Respectively, their rates of rise are -0.05, -1.88, and -3.88mm/yr.
Some more thoughts…….. obviously, there isn’t enough information to state one way or the other about sea-level rise. But, what we can say, is that based on this information, and the prior update on this issue, there isn’t anyway some pinhead took an unbiased view and determined a 3mm/yr rise in the sea levels. But, I’d like to come up with a reasonable number based on observed data. I believe I can get more data points by shortening the time frame, but I’m not sure about how diverse the locations would be, and that’s what I’m looking for. I suppose I could seek out the various locations and come up with a reasonable criteria and then fit the rest of the data to that criteria. I’m not sure. Do you guys have any thoughts on this? I really want this replicable and unquestionably unbiased.
Another thought I had, was to divide up the various coasts, determine an average rate per coast and factor in miles of coast line. I’m also about to look through the notes on each gauge. PSMSL does a nice thing and has the notes directly referenced to the station ID#, so, while it will be tedious, it won’t be difficult.