{"id":17028,"date":"2019-05-15T19:08:08","date_gmt":"2019-05-16T00:08:08","guid":{"rendered":"https:\/\/inside.nssl.noaa.gov\/ewp\/?p=17028"},"modified":"2019-05-16T13:51:23","modified_gmt":"2019-05-16T18:51:23","slug":"above-anvil-cirrus-plumes-and-glm","status":"publish","type":"post","link":"https:\/\/inside.nssl.noaa.gov\/ewp\/2019\/05\/15\/above-anvil-cirrus-plumes-and-glm\/","title":{"rendered":"Above Anvil Cirrus Plumes and GLM"},"content":{"rendered":"

This post will ask more questions than make assertions \ud83d\ude42 We currently see evidence of a weak above anvil cirrus plume (AACP) based on the GOES-16 Sandwich RGB (upper left) and CH02 visible (upper right). Total Optical Energy from GOES-16 (GOES-17) is plotted on the lower left (right).\u00a0 For reference, three of the four frames have 5 minute ENTLN data.<\/p>\n

\"\"<\/p>\n

I’ve wondered if an AACP could extinguish a significant amount of Total Optical Energy (TOE) if lightning was occurring underneath. There are too many caveats here to draw any conclusions, such as:<\/p>\n

    \n
  1. Extreme viewing angle for both GOES satellites resulting in significant parallax.<\/li>\n
  2. A large viewing component of the sides (instead of just the tops) of the storms, resulting in possibly large and highly variable reflectances that might be harder to calibrate TOE against.<\/li>\n
  3. Uncertainty regarding ENTLN efficiency and accuracy this far at the fringe of the ground network.<\/li>\n<\/ol>\n

    So, with all of that being said, what we see here is interesting. ENTLN does show two areas of lightning. GOES-16 picks up on the western area but not the area under the plume (at least not at first). GOES-17, on the other hand, has a better grasp\u00a0 on there being two areas throughout.<\/p>\n

    I hypothesize that GOES-16 is struggling more in this particular scene because of the large reflectance and possible forward scattering issues that GOES-17 is not as susceptible to at this particular time of day.<\/p>\n

    Again, this is not a great setting to test any hypothesis about how much an AACP is able to throw a blanket over GLM detections. However, I’m confident that next week will provide many opportunities to test this with extremely stout AACPs at far more optimal latitudes.<\/p>\n

    #MarfaFront<\/p>\n

     <\/p>\n

     <\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    This post will ask more questions than make assertions \ud83d\ude42 We currently see evidence of a weak above anvil cirrus plume (AACP) based on the GOES-16 Sandwich RGB (upper left)… <\/p>\n

    Read more \u00bb<\/a><\/p>\n","protected":false},"author":138,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,52],"class_list":["post-17028","post","type-post","status-publish","format-standard","hentry","category-news","tag-abi","tag-glm"],"_links":{"self":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/17028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/users\/138"}],"replies":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/comments?post=17028"}],"version-history":[{"count":1,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/17028\/revisions"}],"predecessor-version":[{"id":17042,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/17028\/revisions\/17042"}],"wp:attachment":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/media?parent=17028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/categories?post=17028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/tags?post=17028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}