In the midst of the ongoing series "The Layered Approach To Big Water" I noticed that the PSMSL folks had updated their database on "06 Feb 2017".
At the same time, recalling that I had been preparing the Layer Four and Layer Thirteen graphs for the next post in the layers series, I did some comparisons.
Those things were interesting enough to cause me to think that I should share them with readers.
II. New PSMSL Data
But first, notice the graphs at Fig. 1 and Fig. 2, which were generated with the latest PSMSL datasets I just downloaded.
Those values are calculated and graphed to remind us where the sea level measurements along the coastlines come from (tide gauge stations, constructed and used for centuries, located not where the highest sea levels take place, but where civilization takes place).
III. The Graph Pairs
Next, so that you can more easily compare the underwater ocean temperatures with the sea level changes at the surface, I have grouped the various latitude layers in "Fig. a", "Fig. b" groups.
For another example, the Layer Six WOD graph and its SLC graph are paired as Fig. 4a and Fig. 4b.
This pattern goes on down to Layer Twelve at Fig. 10a and Fig. 10b.
Finally, getting down to brass tacks, can you see that the sea level at the various latitude layers seem to have no coherent relationship with the subsurface ocean temperatures at that same latitude layer?
When you compare them, remember to match the years in the "Fig a" and "Fig b" graphs, because the PSMSL tide gauge records can go back way further than the WOD records.
That said, still the year by year picture presented in the two graphs, IMO, indicate that thermal expansion and contraction are not "the" or even "a" major player in the picture.
Greenland, Antarctica, and large land based glacier fields which are now, and have been for a long time, melting into the ocean, are the major factors (i.e. displacement).
In second place is ghost-water (The Ghost-Water Constant, 2, 3, 4, 5, 6, 7).
That boils down to melt water and ice entering the ocean.
But more than just that, the loss of ice mass equates to a loss of gravitational pull on ocean water around the coasts of the land where the ice sheets are located.
They are freed from the ice sheets' gravitational power, to then be relocated in the direction of the Equator (The Gravity of Sea Level Change, 2, 3, 4).
The massive amounts of global warming heat is, for the very most part, being absorbed by the oceans.
It is, by various mechanisms, mixing with the seemingly inexhaustible supply of cold ocean waters below the warm upper level.
This is nothing less than observable evidence of the dynamic of the second law of thermodynamics, which tells us that heat flows in the direction from hot or warm toward cold or cool.
If there are impediments to that, in terms of salinity and the like, the temperature measurements reflected in the graphs depict the fact that there are several other mechanisms which force various degrees of heat exchanges.
The temperatures go up and the temperatures go down in these deep layers of ocean water (Evidence of Deep-ocean Heat Uptake, Meltwater in Ocean Depths).
The WOD graphs (the "Fig a" graphs) show that heat exchanges are causing temperature changes over the years, and across all these increasingly well measured depths of the oceans.
The PSMSL graphs (the "Fig b" graphs) show us that this is not reflected in any observable coherent manner in terms of comparable sea level changes.
Something else is driving it, and that something else is melting and disintegrating ice sheets and land glacier fields.
We call that something else the degenerating cryosphere.
The next post in this series is here, the previous post in this series is here.