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Giant Atmospheric Waves Over Iowa
JICWyllie
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7
11-16-2007 2:16 PM
388 views
tags:
environment
,
i-freak weather
1 Comment
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11-16-2007
4:45 PM
BartendingBear
About a month ago I clipped
a video of this phenomonon
from YouTube. Very cool to see it in motion.
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/ea1785fb-d9d6-4fb3-874c-080056ab573a/094051AE-B20B-41FB-A0B3-2CB1BAE5A0A1/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.terradaily.com/reports/Giant_Atmospheric_Waves_Over_Iowa_999.html" href="http://www.terradaily.com/reports/Giant_Atmospheric_Waves_Over_Iowa_999.html" style="font-size: 11px;">www.terradaily.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.terradaily.com/reports/Giant_Atmospheric_Waves_Over_Iowa_999.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/www.terradaily.com/img/07C59557-DBD7-40D4-878E-4D43EC9F66E3" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.terradaily.com/reports/Giant_Atmospheric_Waves_Over_Iowa_999.html"><SPAN class="BL">Undular bore waves over Iowa, Oct. 3, 2007. (Credit: Iowa Environmental Mesonet Skycam.)</SPAN></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.terradaily.com/reports/Giant_Atmospheric_Waves_Over_Iowa_999.html"><P>"These waves were created by a cluster of thunderstorms approaching Des Moines from the west," he explains. "At the time, a layer of cold, stable air was sitting on top of Des Moines. The approaching storms disturbed this air, creating a ripple akin to what we see when we toss a stone into a pond."</P><P> Undular bores are a type of "gravity wave"-so called because gravity acts as the restoring force essential to wave motion. Analogy: "We're all familiar with gravity waves caused by boats in water," points out Coleman. "When a boat goes tearing across a lake, water in front of the boat is pushed upward. Gravity pulls the water back down again and this sets up a wave."</P><P> Playing the role of boat, the thunderstorms tearing across Iowa on Oct. 3rd spawned a train of four waves. "They're beautifully shown in this NEXRAD radar image."</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/094051AE-B20B-41FB-A0B3-2CB1BAE5A0A1/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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