Wednesday, December 6, 2017

Proxymetry3 - 7

Fig. 1 Abstract Thermal Expansion
For those who like to keep their own datasets for use on their blogs, updates are available for data in two premier data services.

The Permanent Service For Mean Sea Level (PSMSL) and the World Ocean Database (WOD) have recently updated their datasets.

I updated the WOD datasets in my SQL server, which added about 55 million more in situ measurements to the almost one billion already in it, while the more modest new PSMSL data update only added about 200 new annual sea level records to the mix.
Fig. 2a All WOD Layers
Fig. 2b "Golden 6" WOD Layers
Fig. 2c "Golden 8" WOD Layers

Meanwhile, another type of record keeps being made in more places, and in more ways than one (Rising Seas May Wipe Out These Jersey Towns, but They're Still Rated AAA, Moody's Warns Cities to Address Climate Risks or Face Downgrades, U.S. Disbands Group That Prepared Cities for Climate Shocks).

In tune with Bob Dylan's lyrics ("I used to care, but things have changed"), some agents of officialdom in the real estate business are in denial about the science of things (Real estate industry blocks sea-level warnings that could crimp profits on coastal properties).

So, any of those folks can stop reading now, because I am going to get back to the future and talk about the aforementioned database update and other realities.

For sure, one should keep a close and regular watch on the changing ocean temperatures via WOD data.

The same goes for tide gauge records because, as figure Fig. 2a - Fig. 2c show, there is not only constant change in the oceans, but there are differences in the changing picture depending on which layers of data one uses.

As one can see by those graphs (Fig. 2a - Fig. 2c), the thermal expansion values calculated using the most recent in situ measurements are not as large as those generated by the abstract model (Fig. 1).

In fact, the measurements taken show a decrease in thermal generated ocean sea level rise volume during the time frame shown (1968 - 2016)

That is one reason I constructed the software module that generates an abstract view (Fig. 1) of how ocean thermal expansion would look in a perfect mathematical vacuum, informed of course by historical GISTEMP records.

On the WOD side of things, I have decided to continue using several locations and several combinations of WOD layers (including all ocean depths) in order to determine how thermal expansion and contraction are progressing in world oceans (On Thermal Expansion & Thermal Contraction, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27).

Using different locations, and all depths at those different locations, is a good way to discover how very different things can look, depending on those locations and depths of the measurements taken.

The data that one uses in order to be and stay informed will determine the degree of one's awareness.

So, that type of practice will continue on Dredd Blog until a "Golden xxx" number of WOD locations can be determined to be as useful as the "Golden 23" tide gauge stations selected by scientist Bruce C. Douglas some time ago.

For more information on "layers" see: The Layered Approach To Big Water, 2, 3, 4, 5, 6, 7, 8.

The previous post in this series is here.

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