{"id":40991,"date":"2021-05-28T20:48:43","date_gmt":"2021-05-28T20:48:43","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=40991"},"modified":"2021-06-03T15:48:59","modified_gmt":"2021-06-03T15:48:59","slug":"ice-motion-in-norton-sound-and-an-aircraft-dissipation-trail-over-the-north-slope-of-alaska","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/40991","title":{"rendered":"Ice motion in Norton Sound, and an aircraft dissipation trail over the North Slope of Alaska"},"content":{"rendered":"

\"GOES-17<\/a>

GOES-17 \u201cRed\u201d Visible (0.64 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-17\u00a0(GOES-West)<\/em>\u00a0\u201cRed\u201d Visible (0.64 um<\/strong><\/a>) images\u00a0(above)<\/strong>\u00a0<\/em>showed the motion of ice within Norton Sound<\/strong><\/a> — inbound early in the day, transitioning to outbound later in the day — on 28 May 2021. This ice motion was likely driven primarily by tidal motions within the Sound; for example, a plot of tide height for Unalakeet (below)<\/strong><\/em> depicted rising tide (water moving into the Sound) from 04-20 UTC followed by falling tide (water moving out of the Sound) after 20 UTC.<\/p>\n

\"Plot<\/a>

Plot of tide height at Unalakeet, Alaska on 28 May [click to enlarge]<\/p><\/div>Farther inland over the Alaska North Slope<\/strong><\/a>, comparisons of Suomi NPP VIIRS Visible (0.64 \u00b5m), Shortwave Infrared (3.74 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 1838 and 2015 UTC (below)<\/strong><\/em> revealed the formation and subsequent expansion of an “aircraft dissipation trail”. As an aircraft — likely headed to or from Prudhoe Bay — flew through a relatively thin cloud layer composed of supercooled water droplets, it caused glaciation of supercooled water droplets along its flight path (which then fell out of the cloud as snow).<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS Visible (0.64 \u00b5m),<\/em> Shortwave Infrared (3.74 \u00b5m)<\/em> and Infrared Window (11.45 \u00b5m)<\/em> images [click to enlarge]<\/p><\/div>\n

1-minute GOES-17 Day Cloud Phase Distinction RGB<\/strong><\/a> images created using Geo2Grid<\/strong><\/a> (below)<\/strong><\/em> showed the formation and growth of the aircraft dissipation trail.<\/p>\n

\"GOES-17<\/a>

GOES-17 Day Cloud Phase Distinction RGB images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>\n

===== 29 May Update =====<\/strong><\/p>\n

\"GOES-17<\/a>

GOES-17 \u201cRed\u201d Visible (0.64 um)<\/em> images, with plots of NAM12 model surface winds (green barbs)<\/em> and Metop-A ASCAT winds (red barbs)<\/em> [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>On the following day, 1-minute GOES-17 Visible images (above)<\/strong> <\/em>showed a similar inbound\/outbound diurnal shift in the direction of ice flow within Norton Sound. Plots of NAM12 model surface winds and Metop-A ASCAT surface scatterometer winds indicated that the ice motion was generally orthogonal to surface wind direction — which reaffirmed that tides were the primary factor influencing ice motion during those 2 days.<\/p>\n","protected":false},"excerpt":{"rendered":"

GOES-17\u00a0(GOES-West)\u00a0\u201cRed\u201d Visible (0.64 um) images\u00a0(above)\u00a0showed the motion of ice within Norton Sound — inbound early in the day, transitioning to outbound later in the day — on 28 May 2021. This ice motion was likely driven primarily by tidal motions within the Sound; for example, a plot of tide height for Unalakeet (below) depicted rising […]<\/p>\n","protected":false},"author":18,"featured_media":41000,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37,21,80,45,49,48],"tags":[],"class_list":["post-40991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arctic","category-aviation","category-goes-17","category-redgreenblue-rgb-images","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=40991"}],"version-history":[{"count":8,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40991\/revisions"}],"predecessor-version":[{"id":40999,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40991\/revisions\/40999"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/41000"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=40991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=40991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=40991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}