{"id":30316,"date":"2018-10-14T23:53:18","date_gmt":"2018-10-14T23:53:18","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=30316"},"modified":"2018-10-18T13:33:10","modified_gmt":"2018-10-18T13:33:10","slug":"blowing-dust-along-the-southwest-coast-of-greenland","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/30316","title":{"rendered":"Blowing dust along the southwest coast of Greenland"},"content":{"rendered":"<p><center><\/p>\n<blockquote class=\"twitter-tweet\" data-lang=\"en\">\n<p dir=\"ltr\" lang=\"en\">More <a href=\"https:\/\/twitter.com\/hashtag\/highlatitudedust?src=hash&amp;ref_src=twsrc%5Etfw\">#highlatitudedust<\/a> in <a href=\"https:\/\/twitter.com\/hashtag\/Greenland?src=hash&amp;ref_src=twsrc%5Etfw\">#Greenland<\/a> today! nice contrast of <a href=\"https:\/\/twitter.com\/hashtag\/MODIS?src=hash&amp;ref_src=twsrc%5Etfw\">#MODIS<\/a> and <a href=\"https:\/\/twitter.com\/hashtag\/VIIRS?src=hash&amp;ref_src=twsrc%5Etfw\">#VIIRS<\/a> highlight the differences foam, sea-salt and dust aerosols , source is probabl mix of dust+snow <a href=\"https:\/\/twitter.com\/avoiland?ref_src=twsrc%5Etfw\">@avoiland<\/a> <a href=\"https:\/\/twitter.com\/jscarto?ref_src=twsrc%5Etfw\">@jscarto<\/a> <a href=\"https:\/\/twitter.com\/jobullard?ref_src=twsrc%5Etfw\">@jobullard<\/a> <a href=\"https:\/\/twitter.com\/TWMockford?ref_src=twsrc%5Etfw\">@TWMockford<\/a> <a href=\"https:\/\/twitter.com\/HLCCD?ref_src=twsrc%5Etfw\">@HLCCD<\/a> <a href=\"https:\/\/t.co\/xdm1RKoiBu\">pic.twitter.com\/xdm1RKoiBu<\/a><\/p>\n<p>\u2014 Santiago Gass\u00f3 (@SanGasso) <a href=\"https:\/\/twitter.com\/SanGasso\/status\/1051555029059063808?ref_src=twsrc%5Etfw\">October 14, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/center><\/p>\n<p>As noted by Santiago Gass\u00f3, a long and very narrow plume of airborne dust was evident just off the southwest coast of Greenland on 14 October 2018. Terra MODIS and Suomi NPP VIIRS True Color Red-Green-Blue (RGB) images as viewed using <a href=\"https:\/\/re.ssec.wisc.edu\/s\/iWoDI\"><strong>RealEarth<\/strong><\/a> are shown below. An exposed <em>(free of snow cover)<\/em> glacial outlet between <a href=\"https:\/\/en.wikipedia.org\/wiki\/Qeqertarsuatsiaat\"><strong>Qeqertarsuatsiaat<\/strong><\/a> and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Paamiut\"><strong>Paamiut<\/strong><\/a> was the point source of the dust plume &#8212; the change in water colors <em>(shades of cyan)<\/em> highlighted the offshore flow of meltwater from this glacier into the Labrador Sea, which then began to curve northward within the <a href=\"https:\/\/en.wikipedia.org\/wiki\/West_Greenland_Current\"><strong>West Greenland Current<\/strong><\/a>. The strong pressure gradient between high pressure over southern Greenland and a low pressure southeast of the island (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_surface_analyses_Greenland_anim.gif\"><strong>surface analyses<\/strong><\/a>) along with a passing trough axis caused brisk northerly winds, which lofted the aerosols into the boundary layer.<\/p>\n<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_terra_modis_suomiNPP_viirs_truecolor_Greenland_dust_plume_2_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_terra_modis_suomiNPP_viirs_truecolor_Greenland_dust_plume_2_anim.gif\" alt=\"Terra MODIS and Suomi NPP VIIRS True Color RGB images [click to enlarge]\" width=\"640\" height=\"389\" \/><\/a><p class=\"wp-caption-text\">Terra MODIS and Suomi NPP VIIRS True Color RGB images [click to enlarge]<\/p><\/div>The plume of aerosols was also apparent on GOES-16<em> (GOES-East)<\/em> &#8220;Red&#8221; Visible (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band02.pdf\"><strong>0.64 \u00b5m<\/strong><\/a>) and Near-Infrared &#8220;Snow\/Ice&#8221; (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band05.pdf\"><strong>1.61 \u00b5m<\/strong><\/a>) images <em><strong>(below)<\/strong><\/em>. The appearance of the plume on 1.61 \u00b5m imagery was due to the bright color of the &#8220;glacial flour&#8221; particles, which were efficient reflectors of incoming solar radiation &#8212; this brighter signature showed up well against the dark appearance of the water (which strongly absorbs radiation at the 1.61 \u00b5m wavelength).<\/p>\n<p><div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes16_visible_Greenland_dust_plume_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/G16_VIS_GREENLAND_DUST_14OCT2018_2018287_120038_GOES-16_0001PANEL.GIF\" alt=\"GOES-16 \" width=\"639\" height=\"464\" \/><\/a><p class=\"wp-caption-text\">GOES-16 &#8220;Red&#8221; Visible <em>(0.64 \u00b5m)<\/em> images [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes16_visible_Greenland_dust_plume_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div><div style=\"width: 646px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes16_snowIce_Greenland_dust_plume_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/G16_NIR_GREENLAND_DUST_14OCT2018_2018287_120038_GOES-16_0001PANEL.GIF\" alt=\"GOES-16 Near-Infrared \" width=\"636\" height=\"462\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Near-Infrared &#8220;Snow\/Ice&#8221;<em> (1.61 \u00b5m)<\/em> images [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes16_snowIce_Greenland_dust_plume_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The plume of airborne dust was also seen on GOES-17 Visible and Near-Infrared images <em><strong>(below),<\/strong><\/em> although the viewing angle was less favorable than from GOES-16.<\/p>\n<p style=\"text-align: center;\"><em>* GOES-17 images shown here are preliminary and non-operational *<\/em><\/p>\n<p><div style=\"width: 648px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes17_visible_Greenland_dust_plume_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/G17_VIS_GREENLAND_DUST_14OCT2018_2018287_120038_GOES-17_0001PANEL.GIF\" alt=\"GOES-17 &quot;Red&quot; Visible (0.64 \u00b5m) images [click to play animation | MP4]\" width=\"638\" height=\"479\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Red&#8221; Visible<em> (0.64 \u00b5m)<\/em> images [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes17_visible_Greenland_dust_plume_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div><div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes17_snow_ice_Greenland_dust_plume_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/G17_NIR_GREENLAND_DUST_14OCT2018_2018287_120038_GOES-17_0001PANEL.GIF\" alt=\"GOES-17 Near-Infrared &quot;Snow\/Ice&quot; (1.61 \u00b5m) images [click to play animation | MP4]\" width=\"639\" height=\"479\" \/><\/a><p class=\"wp-caption-text\">GOES-17 Near-Infrared &#8220;Snow\/Ice&#8221; <em>(1.61 \u00b5m)<\/em> images [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_goes17_snow_ice_Greenland_dust_plume_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>Unfortunately, there were no surface observations in the vicinity of the plume source to indicate how strong the surface winds were blowing; the closest active reporting sites along the southwest coast of Greenland were <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_BGGH_SFCMG.GIF\"><strong>Godthaab\/Nuuk<\/strong><\/a> to the distant north and <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_BGBW_SFCMG.GIF\"><strong>Narsarsuaq<\/strong><\/a> to the distant south (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/G16_NIR_GREENLAND_DUST_14OCT2018_2018287_121538_GOES-16_0001PANEL_ANOT.gif\"><strong>large-scale Near-Infrared image<\/strong><\/a>). However, Metop-B ASCAT winds (<strong><a href=\"https:\/\/manati.star.nesdis.noaa.gov\/datasets\/ASCATBData.php\">source<\/a><\/strong>) just offshore of the plume origin area were in the 30-40 knots range around <strong><a href=\"https:\/\/www.ssec.wisc.edu\/datacenter\/METOP-B\/archive\/NA\/2018_10(274-304)\/na2018_10_14_287.gif\">1440 UTC<\/a><\/strong> <em><strong>(below)<\/strong><\/em>.<\/p>\n<div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_1258utc_metopb_ascat.png\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/10\/181014_1258utc_metopb_ascat.png\" alt=\"Metop-B ASCAT surface scatterometer winds [click to enlarge]\" width=\"641\" height=\"563\" \/><\/a><p class=\"wp-caption-text\">Metop-B ASCAT surface scatterometer winds [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>More #highlatitudedust in #Greenland today! nice contrast of #MODIS and #VIIRS highlight the differences foam, sea-salt and dust aerosols , source is probabl mix of dust+snow @avoiland @jscarto @jobullard @TWMockford @HLCCD pic.twitter.com\/xdm1RKoiBu \u2014 Santiago Gass\u00f3 (@SanGasso) October 14, 2018 As noted by Santiago Gass\u00f3, a long and very narrow plume of airborne dust was evident [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":30318,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,80,58,12,53,45,25,49,71,48],"tags":[],"class_list":["post-30316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-goes-17","category-metop","category-modis","category-real-earth","category-redgreenblue-rgb-images","category-satellite-winds","category-suomi_npp","category-terra","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30316","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=30316"}],"version-history":[{"count":17,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30316\/revisions"}],"predecessor-version":[{"id":30334,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30316\/revisions\/30334"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/30318"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=30316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=30316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=30316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}