The «zoo» of
global sea level curves calculated from tide gauge data has grown — tomorrow a new reconstruction of our US colleagues around Carling Hay from Harvard University will appear in Nature (Hay et al. 2015).
By now there are enough local data curves from different parts of the world to create
a global sea level curve.
By now there are enough local data curves from different parts of the world to create
a global sea level curve.
Not exact matches
So the bottom line is: the quadratic acceleration term is a meaningless diagnostic for the real - life
global sea -
level curve.
In the paper these factors are estimated and it is concluded that the North Carolina
curve should be within about 10 cm of
global mean
sea level.
Because the basic shape of this example resembles the observed
global sea -
level curve from about 1930 to 2000.
The
sea -
level estimates are consistent with those from delta18O
curves and numerical ice sheet models, and imply a significant sensitivity of the WAIS and the coastal margins of the EAIS to orbital oscillations in insolation during the Mid-Pliocene period of relative
global warmth.
There is no evidence to suggest that NC
sea level is the same as
global sea level -LSB-...] It seems that NC
sea level curve (original
curve, not K11 simulation) is overestimating the 20th century
sea level rise by 12 cm -LSB-...] During the 20th century NC proxy
sea level shows 70 % higher
sea level rise than observed
global sea level.
Choice of GIA correction is critical in the trends for the local and regional
sea levels, introducing up to 8 mm · yr − 1 uncertainties for individual tide gauge records, up to 2 mm · yr − 1 for regional
curves and up to 0.3 — 0.6 mm · yr − 1 in
global sea level reconstruction.
In short, the existence of individual points with various
sea -
level curves is not general evidence of a
global trend.
Dynamic noise in the
global sea -
level curve may also be linked to changes in the Earth's climate state as discussed above.