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4680High-altitude volcanic plume over US

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  • Mark Conner
    Sep 2, 2008
      Thought some of you might be interested in this. The plumes mentioned below are at about 60,000 ft from an Alaskan volcano that erupted last month. It would be interesting to get photos from a balloon around this layer, to see if it's more visible when looking sideways into the layer instead of up/down through it like satellites or ground-based instruments.

      73 de Mark N9XTN

      -----Original Message-----
      From: volcanicclouds@yahoogroups.com [mailto:volcanicclouds@yahoogroups.com] On Behalf Of Scott Bachmeier
      Sent: Friday, August 29, 2008 5:38 PM
      To: volcanicclouds@yahoogroups.com
      Subject: [volcanicclouds] Kasatochi plume still seen over Wisconsin (way up there at 19 km) ??

      If this is still the Kasatochi plume, then that beast has
      tenacious persistence!

      ----- begin forwarded message -----

      Quick thing of mention that might interest you.

      For about a week, there have been 2 aerosol layers at 17
      and 19km over the AOS building in Madison. The webpage
      thumbnails only go up to 15km, but if you customize the
      image to a higher altitude range, you can see the layers.

      Ed firmly believes what the HSRL is showing is real, which
      reveals low depolarization at a high altitude, with
      indications of higher depolarization (5%, but significant)
      at the base of it. The idea is that there would have to be
      droplets in there with very small particles of ash that
      managed to stay aloft, and some traces of sulfuric acid,
      which Ed explains is expected to increase with time as the
      ash would decrease.

      I hope I managed to paraphrase what Ed said.

      Here's a link to a 6-hour shot. The 17km layer has faded
      some, but the 19km is still sharp.

      http://lidar.ssec.wisc.edu/cgi-bin/util/loadmatlabfigs.cgi?clientid=ba7b02515a7e678762ec79c1 <http://lidar.ssec.wisc.edu/cgi-bin/util/loadmatlabfigs.cgi?clientid=ba7b02515a7e678762ec79c1>

      http://tinyurl.com/5hhjmu <http://tinyurl.com/5hhjmu>


      Joe Garcia