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re: Your graphs actually agree with each other
gbaikie — (archived)

"gb's shows an average rate of increase of about 2 mm/yr for the last 100 years or so - which would indicate a total rise of about 2mm/yr x 100yrs = 200 mm, or 20 cm. ARRELL's graph shows the same thing.

Either way, it is a significant increase, as mentioned especially for low-lying coastal areas."

I would say it's significant in the sense that if it were less of a rise in sea level it would difficult to measure and know that sea levels were actually rising.

But if you think that a 20 cm rise in sea level is significant as in, consequently effects will result. Then perhaps, more precision is warranted:

"When the decadal rates of change are integrated over the entire twentieth century we obtain the figure on the right. Sea level can be seen to have risen around 170 mm on average over the past century. The mean rate for the twentieth century calculated in this way is 1.67±0.04 mm/yr. The first half of the century (1904-1953) had a slightly higher rate (1.91±0.14 mm/yr) in comparison with the second half of the century (1.42±0.14 mm/yr 1954-2003)."
http://www.climateaudit.org/?p=1125

So, that's about 170 mm for entire 20th Century. Or about 6.7 inches.

And the rise in first part of 20th Century was faster than in the latter part of 20th Century- very slightly.

To be precise the rise of sea level in 20th Century was somewhere between 163mm and 171 mm.
Or between 6.417 inches and 6.732 inches.

In the fifty years from 1904 to 1954 between: 88.5 mm to 102.5 mm
And from 1954 to 2003: 64 mm to 78 mm.

If you assume that sea level is being solely caused by human actions, then you must assume that human action has done *something* to DECREASE the rate of sea level rising.

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