{"id":34107,"date":"2019-08-18T21:51:47","date_gmt":"2019-08-18T21:51:47","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=34107"},"modified":"2019-08-27T02:07:25","modified_gmt":"2019-08-27T02:07:25","slug":"pyrocumulonimbus-cloud-in-bolivia","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/34107","title":{"rendered":"Pyrocumulonimbus cloud in Bolivia"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m, top),<\/em> Shortwave Infrared (3.9 \u00b5m, middle)<\/em> and “Clean” Infrared Window (10.35 \u00b5m, bottom)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-16 (GOES-East)<\/em> “Red” Visible (0.64 \u00b5m<\/strong><\/a>), Shortwave Infrared (3.9 \u00b5m<\/strong><\/a>) and “Clean” Infrared Window (10.35 \u00b5m) images (above)<\/strong><\/em> showed the formation of a pyrocumulonimbus (pyroCb) cloud over far southeastern Bolivia on 18 August 2019. The small anvil cloud briefly surpassed the -40\u00baC pyroCb threshold from 1800-1820 UTC, attaining a minimum cloud-top infrared brightness temperature of -45.2\u00baC along the Bolivia\/Paraguay border at 1800 UTC<\/strong><\/a>. This pyroCb formed over the hottest southern portion of an elongated fire line, as seen in the Shortwave Infrared imagery.<\/p>\n

A 1.5-day animation of GOES-16 Shortwave Infrared images (from 12 UTC on 17 August to 2350 UTC on 18 August) revealed the rapid southeastward run of the fire to the Bolivia\/Paraguay border on 17 August, followed by the eastward expansion of the fire line on 18 August (below)<\/strong><\/em>.<\/p>\n

\"GOES-16<\/a>

GOES-16 Shortwave Infrared (3.9 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>A toggle between Suomi NPP VIIRS True Color Red-Green-Blue (RGB) and Infrared Window (11.45 \u00b5m) images as viewed using RealEarth<\/strong><\/a> (below)<\/strong><\/em> showed the large and dense smoke plume streaming southeastward, with the small pyroCb along the Bolivia\/Paraguay border at 1745 UTC — the brighter white tops of the pyrocumulus and pyrocumulonimbus clouds reached higher altitudes than the tan-colored smoke plume. The coldest cloud-top infrared brightness temperature was about -55\u00baC (orange enhancement)<\/em>, which corresponded to an altitude around 9 km according to rawinsonde data<\/strong><\/a> from Corumb\u00e1, Bolivia.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS True Color Red-Green-Blue (RGB) and Infrared Window (11.45 \u00b5m)<\/em> images [click to enlarge]<\/p><\/div>\n

 <\/p>\n

\n

Looking more closely at yesterday’s smoke over South America, the aerosol index from #NOAA20<\/a> #OMPS<\/a> was in double digits! Values on the right refer to the UTC of the measurements. pic.twitter.com\/3XBqoEVs4M<\/a><\/p>\n

\u2014 Colin Seftor (@colin_seftor) August 19, 2019<\/a><\/p><\/blockquote>\n