Daily Archives: December 10, 2019

A Century and More of Sea Level Acceleration

We have several estimates of global sea level based on tide gauge data, and I’d like to compare four of them. First is the best-known and probably most trusted, from Church & White, which I’ll call CW. Next is one I’ve heavily criticized in the past, from Jevrejeva et al., I’ll call it Jev. We also have a recent new approach from Dangendorf et al. which I’ll refer to as Dang. Last (and least) is my own reconstruction (Fos) using my method to align station records and account for VLM (vertical land movement).

I aligned them all to have the same baseline (from 1993 to mid-2010 so I could also put satellite data on the same baseline). First I’ll graph for you their yearly averages, and we notice right away that Jev and Fos start way back in 1807, while CW delays until 1880 and Dang doesn’t begin until 1900:

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