re: #392 Charles

From the paper you linked above:

All of these observations taken together give high confidence
that the ocean state has changed, that the spatial distribution of
the changes is consistent with the large-scale ocean circulation
and that these changes are in response to changed ocean surface
conditions.

While there are many robust findings regarding the changed
ocean state, key uncertainties still remain. Limitations in ocean
sampling (particularly in the SH) mean that decadal variations in
global heat content, regional salinity patterns, and rates of global
sea level rise can only be evaluated with moderate confi dence.
Furthermore, there is low confi dence in the evidence for trends in the MOC and the global ocean freshwater budget.

Finally, the global average sea level rise for the last 50 years is likely to
be larger than can be explained by thermal expansion and loss
of land ice due to increased melting, and thus for this period it
is not possible to satisfactorily quantify the known processes
causing sea level rise.