{"id":2802,"date":"2009-06-25T18:06:01","date_gmt":"2009-06-25T18:06:01","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=2802"},"modified":"2009-06-26T17:34:25","modified_gmt":"2009-06-26T17:34:25","slug":"stratospheric-instrusion-vortex-off-the-us-east-coast","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/2802","title":{"rendered":"“Stratospheric instrusion vortex” off the US East Coast"},"content":{"rendered":"
\"GOES-12<\/a>

GOES-12 water vapor images<\/p><\/div>\n

A small “dry swirl” feature (yellow color enhancement)<\/em> was seen on AWIPS images of the GOES-12 6.5 \u00c2\u00b5m water vapor channel (above)<\/em><\/strong> off the East Coast of the US on 24 June<\/a> – 25 June 2009<\/a><\/strong>. <\/p>\n

A comparison of a GOES-12 water vapor image with the corresponding GOES-12 sounder Total Column Ozone product at 21:00 UTC on 24 June (below)<\/em><\/strong> confirmed that this was a small-scale “stratospheric intrusion vortex”, with ozone values greater than 370 Dobson Units (lighter green color enhancement)<\/em> in the vicinity of the dry feature on the water vapor imagery.<\/p>\n

\"GOES-12<\/a>

GOES-12 water vapor + GOES-12 sounder Total Column Ozone product<\/p><\/div>\n

An overlay of GFS40 model fields on GOES-12 water vapor and Total Column Ozone images (below)<\/em><\/strong> indicated that the dynamic tropopause (taken to be the pressure of the PV1.5 potential vorticity surface)<\/em> was as low as the 400 hPa level at 12:00 UTC on 25 June.<\/p>\n

\"GOES-12<\/a>

GOES-12 water vapor image + GOES-12 sounder Total Column Ozone product<\/p><\/div>\n

A more detailed view of the vortex could be seen using 1-km resolution MODIS 6.7 \u00c2\u00b5m water vapor images (below)<\/em><\/strong>.<\/p>\n

\"MODIS<\/a>

MODIS water vapor images<\/p><\/div>\n

A comparison of MODIS water vapor, IR window, and visible images (below)<\/em><\/strong> showed that there was a lack of high clouds with this stratospheric intrusion vortex — only low-level clouds existed over the region in the vicinity of the vortex.<\/p>\n

\"MODIS<\/a>

MODIS water vapor + IR + visible images<\/p><\/div>\n

A comparison of a MODIS water vapor image with 1-hour MADIS satellite winds and GFS40 400 hPa height (below)<\/em><\/strong> showed that the stratospheric intrusion vortex was located just to the northeast of the closed low that was off the US East Coast during the period.<\/p>\n

\"MODIS<\/a>

MODIS water vapor image + satellite winds + GFS 400 hPa height<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A small “dry swirl” feature (yellow color enhancement) was seen on AWIPS images of the GOES-12 6.5 \u00c2\u00b5m water vapor channel (above) off the East Coast of the US on 24 June – 25 June 2009. A comparison of a GOES-12 water vapor image with the corresponding GOES-12 sounder Total Column Ozone product at 21:00 […]<\/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":[15,19,12,25],"tags":[],"class_list":["post-2802","post","type-post","status-publish","format-standard","hentry","category-goes-sounder","category-goes-12","category-modis","category-satellite-winds"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2802","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=2802"}],"version-history":[{"count":5,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2802\/revisions"}],"predecessor-version":[{"id":2823,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2802\/revisions\/2823"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=2802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=2802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=2802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}