Watts Up With That?

People send me stuff. Here we have another case of value added adjustments that increase the slope, much like temperature.

This email forwarded from Steve Case reads as follows:

The University of Colorado’s Sea Level Research Group just published the 2013 Release #1 of their Global Mean Sea Level Time Series.


I discovered that these periodic releases are on the net all the  way back to 2011 Release #1. So I downloaded all nine of them.

2012 release #1 has 628 entries up to January of 2011 so I had Excel’s slope function calculate  the rate of sea level rise for that time series of 628 entries across all nine releases.

What I found is that the rate of sea level rise has been bumped up twice since then, once in 2011 and the the latest in the current release.  Here’s a link to a graph  to illustrate the point:

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3 Responses to

  1. stacase says:

    Thanks for re-posting my epistle.

    Actually there’s more. The internet wayback machine
    Has old pages for Colorado University’s Sea Level Research Group all the way back to 2004
    which shows a rate of 2.8 mm/yr. If you download the earliest link from above
    which is 2011 release #1 into Excel, you can use the slope function to find out what CU said the rate from 1992 – 2004 was then. And it turns out to be 3.5 mm/yr. Well, there’s 0.3 mm/yr of GIA in that so it’s really only 3.2 mm/yr and the difference is 0.4 mm/yr. So it can all be summed up, 0.4 mm/yr plus the 0.13 mm/yr from above and the GIA adjustment of 0.3 mm/yr. So it’s about 0.8 mm/yr that’s been added in over the last few years.


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