{"id":47777,"date":"2022-09-06T17:12:34","date_gmt":"2022-09-06T17:12:34","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=47777"},"modified":"2022-09-07T17:56:28","modified_gmt":"2022-09-07T17:56:28","slug":"acspo-temperatures-from-viirs-and-goes-r","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/47777","title":{"rendered":"ACSPO Temperatures from VIIRS and GOES-R"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/LakeSuperiorACSPO_BuoyObs-20220906_0855toggle.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1524\" height=\"969\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/LakeSuperiorACSPO_BuoyObs-20220906_0855toggle.gif\" alt=\"\" class=\"wp-image-47783\" \/><\/a><figcaption>ACSPO Lake Surface Temperatures over Lake Superior, 0855 UTC on 6 September 2022, with and without Buoy observations (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>Advanced Clear-Sky Processor for Ocean (ACSPO) temperatures over Lake Superior on 6 September, shown above, show a large area of surface temperature below 55<sup>o<\/sup>F (magenta and white in the enhancement) over central Lake Superior.  Clear early-Autumn skies allowed for this mostly complete view of the Lake Surface.  Although Lake Superior was quite cold with respect to normal in late June (see <a href=\"https:\/\/coastwatch.glerl.noaa.gov\/statistic\/pdf\/all_year_glsea_avg_s.pdf\">this graph<\/a>), its surface waters are now very close to normal.  Note how much warmer the northern end of Lake Michigan is!  The yellow enhancement shows temperatures close to 70<sup>o<\/sup>F. <\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p>The animation below shows VIIRS ACSPO temperatures off the coast of Oregon from 3 separate overpasses.  The strong north winds observed at the buoys strengthen oceanic upwelling, leading to the very cold ocean surface temperatures (51<sup>o<\/sup> &#8211; 52<sup>o<\/sup>F) along the Oregon coast.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/OregonACSPO_WithBuoyObs-20220906_0855_0948_1039step.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1524\" height=\"969\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/OregonACSPO_WithBuoyObs-20220906_0855_0948_1039step.gif\" alt=\"\" class=\"wp-image-47786\" \/><\/a><figcaption>ACSPO Sea Surface Temperatures along the Oregon Coast, 0855, 0948 and 1039 UTC on 6 September 2022, with Buoy observations (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>GOES-R Satellites have level-2 Sea Surface Temperature products as well (<a href=\"https:\/\/www.goes-r.gov\/products\/baseline-SST.html\">link<\/a>) that something like the ACSPO algorithm &#8212; albeit at lower spatial resolution.  The toggle below compares the two products.  VIIRS better captures the cold ribbon of water right along the coast.  The GOES-R algorithm cloud mask at the time below is perhaps too stringent.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/G17vVIIRS_OregonACSPO_WithBuoyObs-20220906_0948toggle.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1524\" height=\"969\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/09\/G17vVIIRS_OregonACSPO_WithBuoyObs-20220906_0948toggle.gif\" alt=\"\" class=\"wp-image-47793\" \/><\/a><figcaption>VIIRS and GOES-R ACSPO Sea Surface Temperatures, ca. 1000 UTC on 6 September 2022 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p>On 4 September, strong nighttime radiation cooling led to the Lake Superior water temperatures being several degrees F warmer than the surface air temperatures at nearby inland locations (overnight minimum temperatures included 33\u00baF in far northern Wisconsin and 34\u00baF in Upper Michigan;  note that the color scale used in the tweet below differs from the one above):  <\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">A sure sign of Autumn: when the <a href=\"https:\/\/twitter.com\/hashtag\/NOAA20?src=hash&amp;ref_src=twsrc%5Etfw\">#NOAA20<\/a> and <a href=\"https:\/\/twitter.com\/hashtag\/SuomiNPP?src=hash&amp;ref_src=twsrc%5Etfw\">#SuomiNPP<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/VIIRS?src=hash&amp;ref_src=twsrc%5Etfw\">#VIIRS<\/a> sea surface temperatures of Lake Superior are warmer than the surface air temperatures at nearby inland sites&#8230; <a href=\"https:\/\/t.co\/KyRC5PmfzP\">https:\/\/t.co\/KyRC5PmfzP<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/MNwx?src=hash&amp;ref_src=twsrc%5Etfw\">#MNwx<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/WIwx?src=hash&amp;ref_src=twsrc%5Etfw\">#WIwx<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/Mwx?src=hash&amp;ref_src=twsrc%5Etfw\">#Mwx<\/a> <a href=\"https:\/\/t.co\/5lNMHRzIIf\">pic.twitter.com\/5lNMHRzIIf<\/a><\/p>&mdash; Scott Bachmeier (@CIMSS_Satellite) <a href=\"https:\/\/twitter.com\/CIMSS_Satellite\/status\/1566529411087745024?ref_src=twsrc%5Etfw\">September 4, 2022<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Advanced Clear-Sky Processor for Ocean (ACSPO) temperatures over Lake Superior on 6 September, shown above, show a large area of surface temperature below 55oF (magenta and white in the enhancement) over central Lake Superior. Clear early-Autumn skies allowed for this mostly complete view of the Lake Surface. Although Lake Superior was quite cold with respect [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":47779,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[80,78,49,48],"tags":[],"class_list":["post-47777","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-17","category-noaa-20","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47777","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=47777"}],"version-history":[{"count":8,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47777\/revisions"}],"predecessor-version":[{"id":47824,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47777\/revisions\/47824"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/47779"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=47777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=47777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=47777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}