{"id":4241,"date":"2009-12-27T15:14:49","date_gmt":"2009-12-27T15:14:49","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=4241"},"modified":"2009-12-29T01:40:13","modified_gmt":"2009-12-29T01:40:13","slug":"stratospheric-intrusion-vortices-over-the-pacific-northwest","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/4241","title":{"rendered":"Stratospheric intrusion vortices over the Pacific Northwest"},"content":{"rendered":"
\"GOES-14<\/a>

GOES-14 6.5 \u00c2\u00b5m water vapor images<\/p><\/div>\n

McIDAS images of the GOES-14 6.5 \u00c2\u00b5m water vapor channel data (above; also available as a QuickTime animation<\/a>)<\/em><\/strong> revealed that a pair of stratospheric intrusion vortices developed over the Pacific Northwest region of the US on 26 December<\/a><\/strong> – 27 December 2009<\/a><\/strong><\/strong>. The spin-up of these vortices occurred within the pronounced dry band that had formed along the western periphery of the large central US Christmas Blizzard<\/a><\/strong>. As a part of its ongoing NOAA Science Test<\/a><\/strong>, the GOES-14 satellite had been placed into Rapid Scan Operations (RSO) mode, providing imagery as frequently as every 5 minutes.<\/p>\n

There have been cases where turbulence aloft has been associated with these types of stratospheric intrusion vortices — and in this instance, AWIPS images of the GOES-West\/GOES-East composite water vapor channels with overlays of pilot reports (below)<\/em><\/strong> did indeed show a few reports of moderate turbulence between 26,000 feet and 40,000 feet above ground level in the vicinity of the vortices.<\/p>\n

\"GOES<\/a>

GOES water vapor images + pilot reports of turbulence<\/p><\/div>\n

As the trailing vortex began to pass over Vancouver Island around 12 UTC on 27 December (water vapor image<\/a><\/strong>), a north-to-south oriented vertical cross section of NAM80 model fields (below)<\/em><\/strong> showed how the dynamic tropopause (taken to be the PV1.5 potential vorticity surface)<\/em> was being pulled downward to around the 450 hPa pressure level. The GOES Sounder Total Column Ozone<\/a><\/strong> product also showed a slight increase in ozone values — to around 350 Dobson Units — associated with the stronger (trailing) stratospheric intrusion vortex.<\/p>\n

\"NAM80<\/a>

NAM80 vertical cross section<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

McIDAS images of the GOES-14 6.5 \u00c2\u00b5m water vapor channel data (above; also available as a QuickTime animation) revealed that a pair of stratospheric intrusion vortices developed over the Pacific Northwest region of the US on 26 December – 27 December 2009. The spin-up of these vortices occurred within the pronounced dry band that had […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,15,40],"tags":[],"class_list":["post-4241","post","type-post","status-publish","format-standard","hentry","category-aviation","category-goes-sounder","category-goes-14"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4241","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=4241"}],"version-history":[{"count":12,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4241\/revisions"}],"predecessor-version":[{"id":4253,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4241\/revisions\/4253"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=4241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=4241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=4241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}