50-Year Sea Level Trends At Newlyn & North Shields

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By Paul Homewood

As promised, I have also run some charts showing 50-year trends for sea level rise at Newlyn and North Shields.

As any half competent oceanographer will tell you, you need to be looking at trends of at least 50 years, as Bruce Douglas points out:

It is well established that sea level trends obtained from tide gauge records shorter than about 50-60 years are corrupted by interdecadal sea level variation.

As with the 10-year trends I presented yesterday, the charts below give 50-year trends on an overlapping monthly basis:

http://ift.tt/1lvHGaC

Both stations show accelerating sea level rise culminating in 1970, before dropping away, and then recovering again in the 1990s.

There is a subtle difference though. The trend at Newlyn is slightly higher now than its peak in 1970, whereas at North Shields it is still well below.

Newlyn is of course heavily influenced by what happens in the Atlantic, so that may be a factor.

Either way, there is no evidence of anything alarming happening to sea levels at these two stations at least.