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| What goes around comes around |
I. Data
The Permanent Service for Mean Sea Level (PSMSL) updated its data on January 11, 2021 (the PSMSL updates frequently).
So, I am refreshing this series using that data.
You can review previous posts in this series (Seaports With Sea Level Change, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).
As I have mentioned before, the PSMSL classifies coastlines with unique numbers.
Some countries have only one such code, while other countries have multiple codes.
The gist of it is that the codes represent a different type of coast/ocean relationship (e.g. one coastline on the Pacific Ocean, another on the Atlantic Ocean, and yet another on the Gulf of Mexico).
So, in the following menu I have separated the HTML and PNG graph files accordingly (note that some multi-coastline countries don't supply sea level data from all of their coastlines).
II. Presentation of Data
| Single Coastline Countries | Multi Coastline Countries | Single Coastline Graphs | Multi Coastline Graphs |
| Appendix: A-C | Appendix: A-C | Appendix: A-C | Appendix: A-C |
| Appendix: D-G | Appendix: D-G | Appendix: D-G | Appendix: D-G |
| Appendix: H-L | Appendix: H-L | Appendix: H-L | Appendix: H-L |
| Appendix: M-O | Appendix: M-O | Appendix: M-O | Appendix: M-O |
| Appendix: P-T | Appendix: P-T | Appendix: P-T | Appendix: P-T |
| Appendix: U-Z | Appendix: U-Z | Appendix: U-Z | Appendix: U-Z |
III. History of Seaport Posts On Dredd Blog
A decade ago, in May of 2011, a post on Dredd Blog asked Will This Float Your Boat?
Since then there have been a plethora of posts on the subject (Series Posts N-Z).
Dredd Blog may have been the first to point out that all seaports will not have the same experience, because as this series plainly shows some seaports are and will be experiencing sea level fall, while others are and will be experiencing sea level rise.
IV. The Word Is Getting Around
I very recently read a helpful paper on this subject which focuses on an important issue that is probably less well known than sea level change itself.
That paper points out a critical issue, which is the enormous increase in seaport usage that is expected to take place over the next three decades:
"Recent trade scenarios suggest that global freight demand could increase between three‐ and seven‐fold by 2050 ..."
(Demand for Ports to 2050: Climate Policy, Growing Trade and the Impacts of Sea‐Level Rise). The article goes on to explain that additional ports are going to have to be built, in addition to refurbishing current ports (some will experience an increase in shallowness as others experience deepening).
The ocean is not like a bathtub (Proof of Concept, 2, 3, 4, 5, 6, 7, 8, 9, 10).
V. Closing Comments
The general "warming commentariat" has heretofore poo pooed that there is anything to see here folks so move along, even as they incessantly use the phrase "worse than expected".
The next post in this series is here, the previous post in this series is here.
