<story><title>Why is sea level rise worse in some places?</title><url>https://nautil.us/why-is-sea-level-rise-worse-in-some-places-294325/</url></story><parent_chain></parent_chain><comment><author>jdontillman</author><text>The NOAA Sea Level Trends data and visualizations are fascinating:&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;tidesandcurrents.noaa.gov&amp;#x2F;sltrends&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;tidesandcurrents.noaa.gov&amp;#x2F;sltrends&amp;#x2F;&lt;/a&gt;&lt;p&gt;Sea levels have been monitored for over 100 years... because of commerce.&lt;p&gt;East coast US seems to be going up about 3mm&amp;#x2F;year, or a foot per century.  That&amp;#x27;s on top of 7 foot tides.&lt;p&gt;West coast US is very steady, barely moving at all.&lt;p&gt;The sea level is dropping in Alaska by 10mm&amp;#x2F;year.  Dropping in Scandinavia also.&lt;p&gt;Some cities show rising sea levels, but really the cities are sinking due to collapsing aquifers; New Orleans and Bangkok.  And measurements made on river deltas are always going to be wild due to silt and all.&lt;p&gt;Most notably, I can&amp;#x27;t find an example in the NOAA data of the rate of sea level rise increasing due to industrialization.  Anybody?</text></comment>
<story><title>Why is sea level rise worse in some places?</title><url>https://nautil.us/why-is-sea-level-rise-worse-in-some-places-294325/</url></story><parent_chain></parent_chain><comment><author>wanderinghogan</author><text>It&amp;#x27;s wild how locally variable the sea level surface is. I worked on a study that incorporated local sea levels into a bath-tub style sea level rise model that that also incorporated storm surge using ADCIRC modeling, and we tried to account for local land subsidence and uplift rates... anyways.&lt;p&gt;If you look at the &amp;quot;NOAA Tides and Currents&amp;quot; data, and go to Maryland, and click two points across the Chesapeake bay from each other. Go to More Data &amp;gt; Datum, you can see just across a 20 mile stretch of bay, Bishops Head MD MHHW (Mean Higher High Water, when there are two daily high tides, this is the elevation of the higher of the two) is 2.06 Feet over the vertical datum, while 20 miles away at Solomons Island MD it&amp;#x27;s a half foot lower, 1.48 Ft.</text></comment>