Wednesday, June 21, 2017

Don't Worry, Be Happy - 2

Fig. 1 Salinity & steric volume change
This is a follow up to Don't Worry, Be Happy posted a few days ago on June 17 (sea level rise impact on islands in Chesapeake Bay, U.S. East Coast).

I am posting this follow-up to reiterate how important it is to, among other things, take any mean averages with a grain of salt.

The previous post was a look at one zone in WOD Layer Five, while today's graphs cover all zones in Layer Five.

Fig. 2 Temperature & steric volume change
The comparison of these two posts is also instructive as to how the presentation of thermal expansion and contraction can impact upon one's perception of that dynamic.

And finally, it shows that my "5.1%" graph technique as to steric changes can also overstate thermosteric (thermal expansion) sea level change.
Fig. 3 Four Panel View

For example, notice Fig.4 (was Fig. 2 in the previous post of this series).

It shows thermal expansion in Zone 7307 of Layer Five, while today's graph of the entire layer does not.

Regular readers know that Dredd Blog consistently points out that sea level is different, even from zone to zone, contrary to the problematic bathtub model discourse (The Bathtub Model Doesn't Hold Water, 2, 3, 4).

The better practice is to acknowledge that there are geophysical realities to consider (The Ghost-Water Constant, 2, 3, 4, 5, 6, 7, 8, 9; The Gravity of Sea Level Change, 2, 3, 4).

Fig. 4 (was Fig. 2 here)
The compaction or compression of the data view in graphs can also enhance detail that is minimized in another graph.

If one compares Fig. 3 with Fig. 2 that concept becomes more clear.

The gist of my point is that it is fine to use different types of graphs so long as details which enhance and contrast what is being displayed are made as clear as possible to the readership.

The previous post in this series is here.

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