On Wednesday, 6 November 2019 16:11:53 UTC, N_Cook wrote:
From Nov 2019 Aviso update (maybe still off-line again, was ther a few
days ago)
ftp://ftp.aviso.altimetry.fr/pub/oceano/AVISO/indicators/msl/MSL_Serie_MERGED_Global_AVISO_GIA_Adjust_Filter2m. txt
and
ftp://ftp.aviso.altimetry.fr/pub/oceano/AVISO/indicators/msl/MSL_Serie_MERGED_Global_AVISO_NoGIA_Adjust_Filter2 m.txt

No-GIA data excludes 0.3mm per year from "zero" of about 1993.173659
but only up
to 2017 and approximate , needs more insight to unravel fully.
610 datapoints from 2003.002659 to 2019.589818 , again I've ignored the
early altimetry
missions because of the instrument drift but mainly it took about a
decade for the SLR suppression by Mount Pinatubo , to drop out of
consideration, effectively linearising any would-have-been acceleration
in SLR ( see the work of Stephen Nerem).
It also allows a convenient time axis zero of year 2000.
Starting after the beginning of Jason1, to avoid some of the cross-over
mismatch, but from visual inspection of SLR plots, about the
re-emergence of accelerated rise, curving upwards, no longer linear
being a representative fit.
Using a www curve-fit number cruncher on those 610 datapoints, so anyome
else with access to a curve-fitter could check my results, hopefully
using a different agency.
For the following y is cm of global SLR in Aviso terms and x is the
decimal year
minus 2000. Again ranking in terms of "goodness" R^2 indicial form
remains the best fit.

linear, R^2 =0.969321
y= 1.394912 + 0.369895 *x
For year 2100
SLR 38.28cm

exponential, R^2= 0.982114
y= 2.258757 -3.814849*(1-e^(x*0.052559))
For 2100
7.292metres

quadratic, R^2= 0.982546
y= 2.447193 + 0.14249 *x + 0.010067 * x^2
For 2100
1.17metres

indicial, R^2, = 0.982663
y = 2.678741 + 0.056302*x^1.590879
For 2100, SLR
88.24cm

My earlier processing of Aviso SLR ,but graphical rather than text
outputs, at the end of the file off the URL in the sig, replacing scicaf
with solent.

--
Monthly public talks on science topics, Hampshire , England
http://diverse.4mg.com/scicaf.htm

"because of the instrument drift"
WTF?
How may miles of "instrument drift" equates to a cotidal line?