Rising sea levels are going to mess with the internet

Thu Jul 26 19:09:33 UTC 2018

Its not satellite data,  it's the exact same data-set that NOAA provides for ocean levels; The data is from tidal sensors;  the data is relayed via satellite so... technically ;). It's kind of funny the data in the table,  vs the chart-data presented,  some .orgs say 80mm, some say 60mm all depends on when you start counting. I'd like to see the raw data,  geospatially portray it,  and get a sense of the true impact;  an average of a statisticcal averages, smoothed and corrected over 60 days with a self-ratcheting baseline... Not sure how valuable the data here is other than support a presupposition.

-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Chris Adams
Sent: Thursday, July 26, 2018 12:01 PM
To: nanog at nanog.org
Subject: Re: Rising sea levels are going to mess with the internet

Once upon a time, William Herrin <bill at herrin.us> said:
> On Thu, Jul 26, 2018 at 12:58 PM, Jason Kuehl <jason.w.kuehl at gmail.com> wrote:
> > Science https://climate.nasa.gov/vital-signs/sea-level/
> 
> "The first graph tracks the change in sea level since 1993 as observed
> by satellites."
> 
> I *really* want to understand the technology that lets a satellite
> hundreds of miles in the sky detect a 3mm change in average global sea
> level between the start and end of the year with an error bar that
> grows to only 4mm over a quarter of a century.

Well, you must not *really* want to understand, since there's a "Learn
more" link to follow on the above page that (after a couple more clicks)
would lead you to this page that has some explanation:

https://www.aviso.altimetry.fr/en/techniques/altimetry.html
-- 
Chris Adams <cma at cmadams.net>