Subject: [Tweeters] results of quick search where term = radar ornithology
Date: Apr 19 07:41:46 2012
From: dave templeton - crazydave65 at gmail.com
hi:
using the term radar ornithology on dogpile yields pages of sites. among
the more promising are these:
http://virtual.clemson.edu/birdrad/comment.htm
http://gcbo.org/default.aspx?MenuItemID=157&MenuGroup=Home&&AspxAutoDetectCookieSupport=1
http://featherflower.blogspot.com/2009/04/radar-ornithology.html
http://ebird.org/content/ebird/news/radar
pulled from the last cite:
The basic metrics are here, and this terminology is used in the
BirdCast migration reports and BirdCast forecasts:
Minimal migration: <5 dBZ -- fewer than 59 birds per cubic kilometer
Light migration: 5-10 dBZ -- approximating 59-71 birds per cubic
kilometer
Moderate migration: 10-20 dBZ -- approximating 71-227 birds per cubic
kilometer
Heavy migration: 20-30 dBZ -- approximating 227-1788 birds per cubic
kilometer
Extreme: >30 dBZ -- more than 1788 birds per cubic kilometer (actually
occurs at some times in very rare circumstances)
regards,
t
--
dave templeton
fall city, wa
crazydave65atgmaildaughtcom
"Don't worry about the world coming to an end today; it's already tomorrow
in Australia." Charles Schultz
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