{"id":4893,"date":"2010-03-26T21:18:59","date_gmt":"2010-03-26T21:18:59","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=4893"},"modified":"2010-05-20T17:29:34","modified_gmt":"2010-05-20T17:29:34","slug":"fire-and-ice","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/4893","title":{"rendered":"Fire and Ice in northern Minnesota"},"content":{"rendered":"
\"MODIS<\/a>

MODIS true color and false color images<\/p><\/div>\n

A comparison of 250-meter resolution MODIS true color and false color Red\/Green\/Blue (RGB) images from the SSEC MODIS Today<\/a><\/strong> site (above)<\/em><\/strong> showed a large fire (perhaps a prescribed burn?)<\/em> in a remote area of the Red Lake Indian Reservation<\/a><\/strong>, just to the west of the Upper and Lower Red Lakes in far northern Minnesota on 26 March 2010<\/a><\/strong>. On the false color RGB image, the fire hot spot shows up as a large bright red feature — note the rapid increase in areal coverage of the burn area between the time of the 17:04 UTC Terra satellite overpass and the 18:50 UTC Aqua satellite overpass<\/a><\/strong>. The still-frozen lakes appear as varying shades of cyan, while unfrozen bodies of water show up as a much darker blue color. On the true color RGB image, the hazy-looking smoke plume can be seen drifting northward (advected by surface winds from the south that were gusting as high as 29 knots)<\/em>.<\/p>\n

\"MODIS<\/a>

MODIS 3.7 \u00c2\u00b5m, POES AVHRR 3.7 \u00c2\u00b5m, and GOES-12 3.9 \u00c2\u00b5m shortwave IR images<\/p><\/div>\n

AWIPS images of the 1-km resolution MODIS 3.7 \u00c2\u00b5m, the 1-km resolution POES AVHRR 3.7 \u00c2\u00b5m, and the 4-km resolution GOES-12 3.9 \u00c2\u00b5m shortwave IR channel data (above)<\/em><\/strong> shows some important differences in both the location of the hottest pixels (GOES-12 has the fire located farther to the west, in far eastern Pennington county)<\/em> as well as the intensity of the hot spots: the 18:42 UTC MODIS image registered a maximum IR brightness temperature value of 46.5\u00c2\u00ba C<\/strong>, and the 18:48 UTC POES AVHRR image registered a value as high as 54.5\u00c2\u00ba C<\/strong>. At that same time, the cursor readout for the 18:45 UTC GOES-12 image read “NO DATA<\/a><\/strong>” — thus demonstrating the value of the 1-km resolution MODIS and POES AVHRR imagery for identifying the exact location of the hottest portion of the fire.<\/p>\n

An animation of the 4-km resolution GOES-12 3.9 \u00c2\u00b5m shortwave IR images (below)<\/em><\/strong> did show that the fire hot spot was gradually growing in size, and briefly began to exhibit IR brightness temperature values as high as 37.5\u00c2\u00ba C<\/strong> at 17:45 UTC and 48.0\u00c2\u00ba C<\/strong> at 18:15 UTC — but then the fire intensity exceeded the AWIPS temperature threshold and “NO DATA<\/a><\/strong>” was indicated by the AWIPS cursor readout before the fire hot spot eventually became obscured by a dense cirrus cloud canopy drifting overhead from the southwest..<\/p>\n

\"GOES-12<\/a>

GOES-12 3.9 \u00c2\u00b5m shortwave IR images<\/p><\/div>\n

The shortwave IR channels on the ABI instrument<\/a><\/strong> aboard the GOES-R satellite<\/a><\/strong> will have a spatial resolution of 2 km, which should produce images that more closely resemble the 1-km resolution MODIS and POES AVHRR images shown above (further enhancing our fire detection capabilities in the future).<\/p>\n","protected":false},"excerpt":{"rendered":"

A comparison of 250-meter resolution MODIS true color and false color Red\/Green\/Blue (RGB) images from the SSEC MODIS Today site (above) showed a large fire (perhaps a prescribed burn?) in a remote area of the Red Lake Indian Reservation, just to the west of the Upper and Lower Red Lakes in far northern Minnesota on […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22,6,19,34,12,26,45],"tags":[],"class_list":["post-4893","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-fire-detection","category-goes-12","category-goes-r","category-modis","category-poes","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4893","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=4893"}],"version-history":[{"count":33,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4893\/revisions"}],"predecessor-version":[{"id":5708,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4893\/revisions\/5708"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=4893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=4893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=4893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}