present and future sea level changes
(1973) mirrored the uplifted Stockholm tide gauge record (from 1774)
against the Amsterdam tide gauge record (from 1682) and arrived at only
one solution giving a mean eustatic rise of 1.1 mm/yr from 1840 to 1930.
A similar figure, ~1.0 mm/yr, was later obtained by Shennan & Woodworth
(1992) for UK and the North Sea region.
water-mark record in Sweden goes back to 1531 (Mörner, 1979, Fig.
0). The mean long-term thend is 4.6 mm/yr. The repeated levelling gives
3.5 mm/yr. So, even this comparision suggest a eustatic component of
about 1.1 mm/yr.
sea level would have been rising in the last century, this should have
led to a deceleration of Earths rate of rotation. Therefore, Mörner
(1992) used the residual trend in the Earths length of day (LOD)
record after filtering out the decadal changes, recalculated it to sea
level changes and compared it to the Northwest European eustatic component.
This indicates that global mean sea level may have risen by 1.1 mm/yr
not more, but well less (Mörner, 1992, 1995).
satellite altimetry data indicate a mean rise in the order of 1.0 mm/yr
from 1986 to 1996 (Fig. 7-5-4; Shum et al., 1999).
The last 150 years trend was ~1.0 mm/yr, the present trend is ~1.0 mm/yr and this value is likely to persist even in the next century. My personal evaluation (Mörner, 1995) is 10 cm, at the most 20 cm, in the next century.