{"id":16,"date":"2006-08-30T18:30:20","date_gmt":"2006-08-30T18:30:20","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/2006\/08\/30\/tropical-depression-ernesto\/"},"modified":"2006-09-05T17:59:05","modified_gmt":"2006-09-05T17:59:05","slug":"tropical-depression-ernesto","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/16","title":{"rendered":"Tropical Depression Ernesto"},"content":{"rendered":"<p><strong><a title=\"Ernesto\" target=\"_blank\" href=\"http:\/\/cimss.ssec.wisc.edu\/tropic\/real-time\/atlantic\/storm\/HURPLOT2.GIF\">Tropcal Storm Ernesto<\/a> <\/strong>moved inland over southern Florida this morning, and was downgraded to a Tropical Depression. The AWIPS image below shows a MODIS vs. GOES comparison of the longwave IR (&#8220;IR Window&#8221;) and shortwave IR channels around 16 UTC. Note on the 1-km resolution MODIS IR Window channel<em><strong> (upper left panel)<\/strong><\/em> the much larger circular-shaped area of <em><strong>colder<\/strong><\/em> cloud top temperatures (-75 to -80 C, gray to white enhancement) over Florida, compared to the 4-km resolution GOES-12 IR<em><strong> <\/strong><\/em>Window channel<em><strong> (upper right panel)<\/strong><\/em>. Also of interest is a signature of slightly <em><strong>warmer<\/strong><\/em>  cloud top temperatures (darker grey enhancement) over that same region on the MODIS shortwave IR <em><strong>(lower left panel) <\/strong><\/em>&#8212; no such signature was yet evident on the corresponding GOES-12 shortwave IR at that time <em><strong>(lower right panel)<\/strong><\/em>:<br \/>\n<a title=\"AWIPS MODIS\/GOES IR comparison\" target=\"_blank\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2006\/08\/060830_modis_goes_ernesto_ir.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"456\" align=\"middle\" title=\"AWIPS MODIS\/GOES IR comparison\" id=\"image15\" alt=\"AWIPS MODIS\/GOES IR comparison\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2006\/08\/060830_modis_goes_ernesto_ir.jpg\" \/><\/a><\/p>\n<p>This signature on the shortwave IR channel is due to the dominance of <em><strong>smaller<\/strong><\/em> cloud particles within the storm tops of the active convection (similar to what is sometimes observed with &#8220;overshooting tops&#8221; associated with severe convection) &#8212; these smaller, more numerous ice particles exhibit a larger shortwave IR albedo, which is manifest as slightly <em><strong>warmer<\/strong><\/em> shortwave IR brightness temperatures (due to enhanced solar reflectance). GOES-10 <strong>Super Rapid Scan Operations (SRSO)<\/strong> imagery at 1-minute intervals (<strong><a target=\"_blank\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2006\/08\/060830_g10_ir4_srso.mov\">IR Window<\/a><\/strong> | <a target=\"_blank\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2006\/08\/060830_g10_ir2_srso.mov\"><strong>Shortwave IR<\/strong><\/a> | <a target=\"_blank\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2006\/08\/060830_g10_vis_srso.mov\"><strong>Visible<\/strong><\/a>) indicated that this particular burst of convection was beginning to rapidly intensify around 16 UTC; this &#8220;small ice particle signature&#8221; did eventually become obvious on the GOES-10 shortwave IR imagery, but not until around 16:11 UTC.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tropcal Storm Ernesto moved inland over southern Florida this morning, and was downgraded to a Tropical Depression. The AWIPS image below shows a MODIS vs. GOES comparison of the longwave IR (&#8220;IR Window&#8221;) and shortwave IR channels around 16 UTC. Note on the 1-km resolution MODIS IR Window channel (upper left panel) the much larger [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-16","post","type-post","status-publish","format-standard","hentry","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/16","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=16"}],"version-history":[{"count":0,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}