{"id":202,"date":"2010-04-08T21:03:59","date_gmt":"2010-04-09T02:03:59","guid":{"rendered":"http:\/\/elegans.uky.edu\/blog\/?p=202"},"modified":"2010-04-08T21:03:59","modified_gmt":"2010-04-09T02:03:59","slug":"measuring-sea-level","status":"publish","type":"post","link":"http:\/\/jimlund.org\/blog\/?p=202","title":{"rendered":"Measuring sea level"},"content":{"rendered":"<p>I&#8217;ve always wondered how sea level is measured so accurately.  Global sea level changes are measured to high accuracy.  The global yearly sea rise averaged over many years is measured to  a fraction of a mm.  There are two ways sea level is measured.  The old system uses tidal gauges, and satellites were launched in 1992 (TOPEX\/Poseidon) and 2005 (Jason-1).<\/p>\n<p>Here&#8217;s a page explaining how the tidal gauges work: <a href=\"http:\/\/sealevel.colorado.edu\/tidegauges.html\">Univ. of Colorado<\/a>.  Ah, stilling well!<\/p>\n<p><img decoding=\"async\" src=\"pics\/tide_gauge.jpeg\" alt=\"tidal gauge diagram\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve always wondered how sea level is measured so accurately. Global sea level changes are measured to high accuracy. The global yearly sea rise averaged over many years is measured to a fraction of a mm. There are two ways sea level is measured. The old system uses tidal gauges, and satellites were launched in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-202","post","type-post","status-publish","format-standard","hentry","category-science"],"_links":{"self":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=202"}],"version-history":[{"count":0,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/202\/revisions"}],"wp:attachment":[{"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=202"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jimlund.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}