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	<title>MetaFilter posts tagged with clouds</title>
	<link>http://www.metafilter.com/tags/clouds</link>
	<description>Posts tagged with 'clouds' at MetaFilter.</description>
	<pubDate>Wed, 03 Jun 2009 09:13:42 -0800</pubDate> <lastBuildDate>Wed, 03 Jun 2009 09:13:42 -0800</lastBuildDate>

	<language>en-us</language>
	<docs>http://blogs.law.harvard.edu/tech/rss</docs>
	<ttl>60</ttl>
	<item>
		<title>Google&apos;s got nothing on the asperatus</title>
		<link>http://www.metafilter.com/82145/Googles%2Dgot%2Dnothing%2Don%2Dthe%2Dasperatus</link>
		<description> The &lt;a href=&quot;http://cloudappreciationsociety.org/&quot;&gt;Cloud Appreciation Society&lt;/a&gt; is &lt;a href=&quot;http://cloudappreciationsociety.org/name-that-cloud/&quot;&gt;trying&lt;/a&gt; to get the Royal Meteorological Society to recognize &lt;a href=&quot;http://www.dailymail.co.uk/sciencetech/article-1189877/The-cloud-Meteorologists-campaign-classify-unique-Asperatus-clouds-seen-world.html&quot;&gt;a new form of cloud&lt;/a&gt; (&lt;a href=&quot;http://news.bbc.co.uk/today/hi/today/newsid_8076000/8076805.stm&quot;&gt;pix&lt;/a&gt;). More about &lt;a href=&quot;http://www.islandnet.com/~see/weather/history/howard.htm&quot;&gt;how cloud naming got started&lt;/a&gt; and &lt;a href=&quot;http://iit.bloomu.edu/doll/weather/&quot;&gt;more cloud photos&lt;/a&gt;. &lt;small&gt;[&lt;a href=&quot;http://www.metafilter.com/tags/clouds&quot;&gt;previous clouds&lt;/a&gt;, &lt;a href=&quot;http://twitter.com/mat/status/2017678933&quot;&gt;via&lt;/a&gt;]&lt;/small&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2009:site.82145</guid>
		<pubDate>Wed, 03 Jun 2009 09:13:42 -0800</pubDate>
		<category>asperatus</category>
		<category>cloud</category>
		<category>cloudappreciation</category>
		<category>clouds</category>
		<category>cloudviewer</category>
		<category>meteorology</category>
		<category>nephology</category>
		<dc:creator>jessamyn</dc:creator>
	</item>
      <item>
		<title>A glorious morning</title>
		<link>http://www.metafilter.com/79286/A%2Dglorious%2Dmorning</link>
		<description> The &lt;a href=&quot;http://www.dropbears.com/brough/gallery/morning_glory/mg9302.htm&quot;&gt;Morning Glory&lt;/a&gt; might be the coolest cloud on the planet. It crosses the &lt;a href=&quot;http://en.wikipedia.org/wiki/Gulf_of_Carpentaria&quot;&gt;Gulf of Carpentaria&lt;/a&gt; in northern Australia on many mornings in September and October. It can be 1000 kilometers long, two kilometers high, travel at least 60 km per hour and can be &lt;a href=&quot;http://www.dropbears.com/brough/satpic.htm&quot;&gt;seen from space&lt;/a&gt;. &lt;a href=&quot;http://cloudappreciationsociety.org/mg1/&quot;&gt;Glider pilots&lt;/a&gt; gather in tiny, remote &lt;a href=&quot;http://maps.google.com/maps?hl=en&amp;q=burketown+qld&amp;ie=UTF8&amp;t=h&amp;z=9&quot;&gt;Burketown QLD&lt;/a&gt; hoping to &#8220;&lt;a href=&quot;http://www.youtube.com/watch?v=6BP3_rrj7ZQ&quot;&gt;surf&lt;/a&gt;&#8221; the cloud. Here&apos;s a &lt;a href=&quot;http://www.morninggloryaustralia.com/doco1.html&quot;&gt;short documentary&lt;/a&gt; (30 minutes; best footage is in part 4). 

This kind of cloud also forms&#8212;with less predictability&#8212;over &lt;a href=&quot;http://xenmate.blogspot.com/2008/01/wave-part-3.html&quot;&gt;Sable Island, Canada&lt;/a&gt;, and off the coast of &lt;a href=&quot;http://flickr.com/photos/robinhutton/413337607/&quot;&gt;Western Australia&lt;/a&gt;. </description>
		<guid isPermaLink="false">tag:metafilter.com,2009:site.79286</guid>
		<pubDate>Wed, 18 Feb 2009 13:17:11 -0800</pubDate>
		<category>australia</category>
		<category>clouds</category>
		<category>gliding</category>
		<category>glory</category>
		<category>morning</category>
		<category>morningglory</category>
		<dc:creator>rtha</dc:creator>
	</item>
      <item>
		<title>We are encased in a world of light and cloud</title>
		<link>http://www.metafilter.com/78388/We%2Dare%2Dencased%2Din%2Da%2Dworld%2Dof%2Dlight%2Dand%2Dcloud</link>
		<description> Photos of &lt;a href=&quot;http://www.blakegordon.com/stories/cloudprojections.html&quot;&gt;shadows in the clouds&lt;/a&gt; over Austin.&lt;small&gt; via &lt;a href=&quot;http://bldgblog.blogspot.com/2009/01/sky-tv.html&quot;&gt;bldgblog&lt;/a&gt;&lt;/small&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2009:site.78388</guid>
		<pubDate>Sat, 17 Jan 2009 20:21:32 -0800</pubDate>
		<category>clouds</category>
		<category>lights</category>
		<category>photgraphy</category>
		<dc:creator>signal</dc:creator>
	</item>
      <item>
		<title>Don&apos;t hang around &apos;cause two&apos;s a crowd</title>
		<link>http://www.metafilter.com/72853/Dont%2Dhang%2Daround%2Dcause%2Dtwos%2Da%2Dcrowd</link>
		<description> &lt;a href=&quot;http://www.collthings.co.uk/2008/06/10-very-rare-clouds.html&quot;&gt;10 Rare Clouds&lt;/a&gt;. &lt;a href=&quot;http://www.collthings.co.uk/2008/05/20-cool-clouds.html&quot;&gt;20 Cool Clouds&lt;/a&gt;. &lt;a href=&quot;http://chamorrobible.org/gpw/gpw-20061021.htm&quot;&gt;NASA clouds&lt;/a&gt;.  &lt;a href=&quot;http://en.wikipedia.org/wiki/Cloud_types&quot;&gt;List of Cloud Types (wiki)&lt;/a&gt;. &lt;small&gt;&lt;a href=&quot;http://www.metafilter.com/40286/Clouds&quot;&gt;previously&lt;/a&gt;&lt;/small&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2008:site.72853</guid>
		<pubDate>Fri, 27 Jun 2008 10:46:55 -0800</pubDate>
		<category>clouds</category>
		<category>nature</category>
		<category>photography</category>
		<category>weather</category>
		<dc:creator>swift</dc:creator>
	</item>
      <item>
		<title>Giant Waves Over Iowa</title>
		<link>http://www.metafilter.com/65691/Giant%2DWaves%2DOver%2DIowa</link>
		<description> &lt;a href=&quot;http://www.youtube.com/watch?v=yXnkzeCU3bE&amp;mode=related&amp;search=&quot;&gt;Undular&lt;/a&gt;  &lt;a href=&quot;http://www.youtube.com/watch?v=aako5siSTgM&amp;mode=related&amp;search=&quot;&gt;   Bore&lt;/a&gt; &lt;a href=&quot;http://science.nasa.gov/headlines/y2007/11oct_undularbore.htm?list1043252&quot;&gt;Waves&lt;/a&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2007:site.65691</guid>
		<pubDate>Fri, 19 Oct 2007 05:15:33 -0800</pubDate>
		<category>clouds</category>
		<category>gravitywaves</category>
		<category>iowa</category>
		<category>timelapse</category>
		<category>tornados</category>
		<category>weather</category>
		<dc:creator>geos</dc:creator>
	</item>
      <item>
		<title>Can I play too</title>
		<link>http://www.metafilter.com/65625/Can%2DI%2Dplay%2Dtoo</link>
		<description> &lt;a href=&quot;http://www.kiwisbybeat.com/minus40.html&quot;&gt;Free&lt;/a&gt; &lt;a href=&quot;http://www.kiwisbybeat.com/minus11.html&quot;&gt;Ice&lt;/a&gt; &lt;a href=&quot;http://www.kiwisbybeat.com/minus36.html&quot;&gt;Cream&lt;/a&gt; &lt;a href=&quot;http://www.kiwisbybeat.com/minus13.html&quot;&gt;Day&lt;/a&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2007:site.65625</guid>
		<pubDate>Wed, 17 Oct 2007 07:04:10 -0800</pubDate>
		<category>childlike</category>
		<category>clouds</category>
		<category>elephant</category>
		<category>hair</category>
		<category>heartbreaker</category>
		<category>icecream</category>
		<category>minus</category>
		<category>thingsIdoinsteadofwork</category>
		<category>watercolors</category>
		<category>webcomic</category>
		<category>whimsical</category>
		<dc:creator>Rubbstone</dc:creator>
	</item>
      <item>
		<title>in the clouds</title>
		<link>http://www.metafilter.com/60464/in%2Dthe%2Dclouds</link>
		<description> &lt;a href=&quot;http://leenks.com/link70511.htm&quot;&gt;Rare&lt;/a&gt; and &lt;a href=&quot;http://valuca.funtigo.com/?preview=y&amp;g=25544746&amp;cr=1&amp;rfm=y&quot;&gt;strange&lt;/a&gt; cloud formations. &lt;a href=&quot;http://en.wikipedia.org/wiki/Mammatus_clouds&quot;&gt;Mammatus&lt;/a&gt;, &lt;a href=&quot;http://en.wikipedia.org/wiki/Lenticular_Clouds&quot;&gt;lenticular&lt;/a&gt;, &lt;a href=&quot;http://spaceweather3.com/nlcs/gallery2005_page1.htm&quot;&gt;noctilucent&lt;/a&gt;, &lt;a href=&quot;http://www.atoptics.co.uk/nacr1.htm&quot;&gt;nacreous&lt;/a&gt;, &lt;a href=&quot;http://news.bbc.co.uk/1/hi/sci/tech/3394461.stm&quot;&gt;hole in the sky&lt;/a&gt;. &lt;a href=&quot;http://islandnet.com/~see/weather/eyes/cloudatlas.htm&quot;&gt;Basic cloud guide&lt;/a&gt;.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2007:site.60464</guid>
		<pubDate>Fri, 20 Apr 2007 10:09:17 -0800</pubDate>
		<category>clouds</category>
		<category>holyshit</category>
		<category>meteorology</category>
		<dc:creator>nickyskye</dc:creator>
	</item>
      <item>
		<title>clouds from both sides now</title>
		<link>http://www.metafilter.com/59965/clouds%2Dfrom%2Dboth%2Dsides%2Dnow</link>
		<description>&lt;a href="http://www.jerryesmith.com/index.php/2"&gt;Weather warfare.&lt;/a&gt; [more inside]  </description>
		<guid isPermaLink="false">tag:metafilter.com,2007:site.59965</guid>
		<pubDate>Tue, 03 Apr 2007 08:46:55 -0800</pubDate>
		<category>climate</category>
		<category>clouds</category>
		<category>cloudseeding</category>
		<category>globalwarming</category>
		<category>weather</category>
		<category>weatherwarfare</category>
		<dc:creator>nickyskye</dc:creator>
	</item>
      <item>
		<title>These clouds are nice. Some clouds are ice!</title>
		<link>http://www.metafilter.com/54985/These%2Dclouds%2Dare%2Dnice%2DSome%2Dclouds%2Dare%2Dice</link>
		<description>&lt;a href="http://pic1.funtigo.com/valuca?g=25544746&amp;amp;cr=1"&gt;&#1758;&#1769;unusual clouds&#1769;&#1758;&lt;/a&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2006:site.54985</guid>
		<pubDate>Fri, 22 Sep 2006 12:45:08 -0800</pubDate>
		<category>clouds</category>
		<category>images</category>
		<category>meteorology</category>
		<category>photography</category>
		<category>photos</category>
		<category>SCIENCE!?</category>
		<dc:creator>riotgrrl69</dc:creator>
	</item>
      <item>
		<title>Sprites (atmospheric) - new movie</title>
		<link>http://www.metafilter.com/49279/Sprites%2Datmospheric%2Dnew%2Dmovie</link>
		<description>&lt;a href="http://www.newscientist.com/channel/earth/dn8733.html"&gt;7000 frames per second&lt;/a&gt; Newscientist article, with links to the movies. 
&quot;Atmospheric &apos;sprites&apos; captured in explosive detail
  ...  by researchers using an ultra-high-speed camera.

&quot;The best images yet of the flashes &#8211; which resemble a giant undulating jellyfish with its tentacles falling from a halo of light &#8211; have allowed the team to pick apart their structure and mechanics. &quot;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2006:site.49279</guid>
		<pubDate>Fri, 17 Feb 2006 11:04:46 -0800</pubDate>
		<category>7000fps</category>
		<category>atmosphere</category>
		<category>atmospherics</category>
		<category>clouds</category>
		<category>highspeed</category>
		<category>lightning</category>
		<category>photography</category>
		<category>science</category>
		<category>sprites</category>
		<category>weather</category>
		<dc:creator>hank</dc:creator>
	</item>
      <item>
		<title>Surreal Clouds</title>
		<link>http://www.metafilter.com/43072/Surreal%2DClouds</link>
		<description>&lt;a href="http://www.jornolsen.com/mam/mamgallery.htm"&gt;Cumulonimbus Mammatus&lt;/a&gt; - interesting looking clouds  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.43072</guid>
		<pubDate>Mon, 27 Jun 2005 03:06:51 -0800</pubDate>
		<category>clouds</category>
		<category>gallery</category>
		<category>photography</category>
		<dc:creator>Gyan</dc:creator>
	</item>
      <item>
		<title>The Cloud Harp</title>
		<link>http://www.metafilter.com/42886/The%2DCloud%2DHarp</link>
		<description>&lt;a href="http://www.cloudharp.org/"&gt;The Cloud Harp.&lt;/a&gt; The transposition of a natural phenomenon into music. The &lt;a href=&quot;http://www.cloudharp.org/Software-sounds.htm&quot;&gt;melodies and sounds &lt;/a&gt;are determined by factors such as cloud height, density, structure, luminosity, and meteorological conditions.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.42886</guid>
		<pubDate>Sun, 19 Jun 2005 04:37:47 -0800</pubDate>
		<category>cloudharp</category>
		<category>cloudmusic</category>
		<category>clouds</category>
		<category>melodies</category>
		<category>meteorology</category>
		<category>music</category>
		<category>weather</category>
		<dc:creator>nickyskye</dc:creator>
	</item>
      <item>
		<title>Clouds</title>
		<link>http://www.metafilter.com/40286/Clouds</link>
		<description>&lt;a href="http://www.cloudappreciationsociety.org/index.html"&gt;&quot;We pledge to fight &#8216;blue-sky thinking&#8217; wheresoever we find it!&quot;&lt;/a&gt; &lt;br&gt;  &lt;strong&gt;Clouds&lt;/strong&gt; can be &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/gallery/assets_gallery/james_townsend/2004_0208.jpg&quot;&gt;strange looking&lt;/a&gt;, &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/gallery/assets_gallery/william_kolesar/OctBch3jpg.jpg&quot;&gt;majestic&lt;/a&gt;, &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/gallery/assets_gallery/geoff_rowley/Sunrise-Gatwick.jpg&quot;&gt;colour&lt;/a&gt;f&lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/gallery/assets_gallery/hbaldock/cloud2.jpg&quot;&gt;ul&lt;/a&gt;, &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/gallery/assets_gallery/james_townsend/2004_0208.jpg&quot;&gt; freaky&lt;/a&gt;, &lt;a href=&quot;http://www.australiasevereweather.com/photography/photos/1999/1116jd05.jpg&quot;&gt;ominous&lt;/a&gt; or &lt;a href=&quot;http://www.australiasevereweather.com/photography/photos/2002/0320sl01.jpg&quot;&gt;electric&lt;/a&gt; to name but a &lt;a href=&quot;http://www.australiasevereweather.com/index.html&quot;&gt;few&lt;/a&gt;. &lt;br&gt;
Perhaps you&#8217;d like to go cloud &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/glory/glory1.html&quot;&gt;&#8217;surfing&#8217;&lt;/a&gt; in a glider along a 600 mile cloud formation that &lt;a href=&quot;http://www.dropbears.com/brough/gallery/waves_2001/index.htm&quot;&gt;appears&lt;/a&gt; in &lt;a href=&quot;http://www.cloudappreciationsociety.org/3content/glory/glory_moreinfo.html&quot;&gt;Queensland&lt;/a&gt; (film links/explanation) later in the year? &lt;br&gt;

Or would you rather view your clouds from &lt;a href=&quot;http://www.gesource.ac.uk/worldguide/satellite_clouds.html&quot;&gt;satellite&lt;/a&gt;? &lt;br&gt;

You can otherwise &lt;a href=&quot;http://www.physicalgeography.net/fundamentals/8e.html&quot;&gt;study&lt;/a&gt; &lt;a href=&quot;http://weather.about.com/library/weekly/aa032802a.htm&quot;&gt;cloud formations&lt;/a&gt; at your &lt;a href=&quot;http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/home.rxml&quot;&gt;leisure&lt;/a&gt; if you want. &lt;/p&gt;
 
There&#8217;s a million &lt;a href=&quot;http://store.nzmusic.com/track/52236&quot;&gt;m&lt;/a&gt;o&lt;a href=&quot;http://www.lyricsfreak.com/c/crowded-house/34420.html&quot;&gt;r&lt;/a&gt;e sites around of course &#8211; first link &lt;a href=&quot;http://scout.wisc.edu/&quot;&gt;via&lt;/a&gt;.
&lt;/dd&gt;&lt;/dt&gt;&lt;/dd&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2005:site.40286</guid>
		<pubDate>Tue, 08 Mar 2005 15:08:51 -0800</pubDate>
		<category>clouds</category>
		<category>photography</category>
		<category>weather</category>
		<dc:creator>peacay</dc:creator>
	</item>
      <item>
		<title>burning sky</title>
		<link>http://www.metafilter.com/36585/burning%2Dsky</link>
		<description>&lt;a href="http://science.nasa.gov/headlines/y2003/18feb_nlc.htm"&gt;Strange clouds.&lt;/a&gt; Noctilucent clouds as seen from the ISS. &lt;a href=&quot;http://science.nasa.gov/headlines/news_archive.htm&quot;&gt;Via Science @ NASA headline archives.&lt;/a&gt; Also: &lt;a href=&quot;http://&quot;&gt;twirling rosin.&lt;/a&gt;  </description>
		<guid isPermaLink="false">tag:metafilter.com,2004:site.36585</guid>
		<pubDate>Thu, 28 Oct 2004 14:35:51 -0800</pubDate>
		<category>clouds</category>
		<category>ISS</category>
		<category>NASA</category>
		<category>noctilucent</category>
		<category>space</category>
		<dc:creator>loquacious</dc:creator>
	</item>
      <item>
		<title>Hurricanes are for suckOrZ</title>
		<link>http://www.metafilter.com/35546/Hurricanes%2Dare%2Dfor%2DsuckOrZ</link>
		<description> Enviromental absorbant products manufacturer, Dyn-O-Mat claims to have &lt;a href=&quot;http://www.dynomat.com/storm.shtml&quot;&gt;removed a cloud&lt;/a&gt; from Doppler radar and intends to test their product on a hurricane. They have a &lt;a href=&quot;http://www.anomalies-unlimited.com/Chemtrails/DynoPatent.html&quot;&gt;patent&lt;/a&gt; and everything. The federal government spent two decades on &lt;a href=&quot;http://www.aoml.noaa.gov/hrd/hrd_sub/sfury.html&quot;&gt;Project Stormfury&lt;/a&gt;, an attempt to halt storms by &apos;seeding&apos; the eyewall of a hurricane. &lt;a href=&quot;http://perdurabo10.tripod.com/id938.html&quot;&gt;This guy&lt;/a&gt; says we are already doing it with the militaries &lt;a href=&quot;http://www.haarp.alaska.edu/&quot;&gt;High Frequency Active Auroral Research Program&lt;/a&gt;. Even if we&apos;re not doing it &lt;a href=&quot;http://groups.yahoo.com/group/weather_ops/message/1&quot;&gt;now&lt;/a&gt;, we&apos;ll definately by &lt;strong&gt;own&lt;/strong&gt; the weather by &lt;a href=&quot;http://www.au.af.mil/au/2025/volume3/chap15/v3c15-1.htm&quot;&gt;2025&lt;/a&gt;. 


That is, unless we&apos;re intentionally &lt;a href=&quot;http://www.bariumblues.com/storm_fury.htm&quot;&gt;causing&lt;/a&gt; storms.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2004:site.35546</guid>
		<pubDate>Sun, 12 Sep 2004 17:36:14 -0800</pubDate>
		<category>clouds</category>
		<category>dynomat</category>
		<category>hurricanes</category>
		<category>stormfury</category>
		<category>weather</category>
		<dc:creator>cedar</dc:creator>
	</item>
      <item>
		<title>Plankton may form clouds.</title>
		<link>http://www.metafilter.com/34393/Plankton%2Dmay%2Dform%2Dclouds</link>
		<description>&lt;a href="http://www.wired.com/news/technology/0,1282,64239,00.html?tw=wn_tophead_12"&gt;Clouds&lt;/a&gt; &lt;a href=&quot;http://www.sciencedaily.com/releases/2004/05/040506072006.htm&quot;&gt;formed&lt;/a&gt; at sea may be created by &lt;a href=&quot;http://en.wikipedia.org/wiki/Plankton&quot;&gt;plankton&lt;/a&gt; to protect themselves from harsh UV rays by inducing more &lt;a href=&quot;http://www.chemistry.org/portal/a/c/s/1/acsdisplay.html?DOC=HomeMolecule%5Carchive%5Cmotw_dimethyl_sulfide_arch.html&quot;&gt;dimethyl sulfide&lt;/a&gt;  to the atmosphere.  </description>
		<guid isPermaLink="false">tag:metafilter.com,2004:site.34393</guid>
		<pubDate>Sat, 17 Jul 2004 01:35:03 -0800</pubDate>
		<category>atmosphere</category>
		<category>clouds</category>
		<category>ecology</category>
		<category>gaia</category>
		<category>plankton</category>
		<category>uvrays</category>
		<dc:creator>rudyfink</dc:creator>
	</item>
      <item>
		<title>noctilucent clouds</title>
		<link>http://www.metafilter.com/34049/noctilucent%2Dclouds</link>
		<description> &lt;a href=&quot;http://antwrp.gsfc.nasa.gov/apod/image/0306/noctilucent_pp_big.gif&quot; title=&quot;Sometimes it&apos;s night on the ground but day in the air. As the Earth rotates to eclipse the Sun, sunset rises up from the ground. Therefore, at sunset on the ground, sunlight still shines on clouds above. Under usual circumstances, a pretty sunset might be visible, but unusual noctilucent clouds float so high up they can be seen well after dark. - Astronomy Picture of the Day 2003 June 15&quot;&gt;n&lt;/a&gt;&lt;a href=&quot;http://lasp.colorado.edu/noctilucent_clouds/&quot; title=&quot;Clouds at extremely high altitude, about 85 km, that literally (as the name suggests) shine at night. They form in the cold, summer polar mesopause and are believed to be ice crystals. Because of their high altitude, in a very dry part of the atmosphere, noctilucent clouds are rather an enigma and are being studied by a number of people around the world.&quot;&gt;o&lt;/a&gt;&lt;a href=&quot;http://www.nlcnet.co.uk/&quot; title=&quot;Noctilucent Cloud: Observers&apos; Homepage&quot;&gt;c&lt;/a&gt;&lt;a href=&quot;http://www.tamug.edu/labb/Antarctica/GreatWhiteSouth/Color/Noctilucent_sky.htm&quot; title=&quot;Noctilucent clouds over McMurdo Sound, Antarctica, August 1981&quot;&gt;t&lt;/a&gt;&lt;a href=&quot;http://www.antdiv.gov.au/default.asp?casid=2005&quot; title=&quot;Noctilucent clouds can only be seen when the sun is shining on them (at ~83 km) and not on the lower atmosphere, i.e. when the sun is between 6 and 16 degrees below the horizon. Australian Antarctic Division - Noctilucent clouds&quot;&gt;i&lt;/a&gt;&lt;a href=&quot;http://www.polarimage.fi/nclouds/1973.htm&quot; title=&quot;Noctilucent clouds 1977-1985 First noctilucent clouds (NLC) I photographed in July 1977 (first image): I knew there was a phenomenon called NLC, but word &apos;&apos;cloud&apos;&apos; did not inspire to stay up summer nights! Then accidentally a bright display caught my eye and since then there was no way to avoid monitoring these silent, white sailors in summer night.&quot;&gt;l&lt;/a&gt;&lt;a href=&quot;http://www.meteoros.de/nlc/nlce.htm&quot; title=&quot;Noctilucent clouds (NLC) are thin clouds of a silvery white which in some summer nights can be seen in northerly directions near the horizon. Contrary to other types of clouds which maximally reach altitudes of about 13 km, noctilucent clouds appear at an altitude of about 83 km They are only visible when the sun is between 6&amp;#0176; and 16&amp;#0176; below the horizon Then the noctilucent clouds are still lit by the sun while the sky is already dark. Noctilucent clouds only form when the temperature of the mesopause is very low. These low temperatures normally occur between mid May and mid August. Especially in June and July noctilucent clouds can be observed in some nights. In our region, they normally reach an elevation of about 20&amp;#0176; above the northwesterly to the northeasterly horizon. In special cases they can be observed near the zenith even in our regions.&quot;&gt;u&lt;/a&gt;&lt;a href=&quot;http://www.lightningwizard.com/AurNLC.php&quot; title=&quot;Photographs of Aurora and Noctilucent Clouds - Page 1&quot;&gt;c&lt;/a&gt;&lt;a href=&quot;http://personal.inet.fi/koti/tom.eklund/NLC.html&quot; title=&quot;Gallery: Noctilucent clouds (popularly referred to by the abbreviation &quot;NLC&quot; ) are high atmosphere cloud formations thought to be composed of small ice-coated particles; their precise nature remains a mystery. They form at very high altitudes - around 82 km above sea level - and are, thus, a quite separate phenomenon from normal weather or tropospheric cloud.&quot;&gt;e&lt;/a&gt;&lt;a href=&quot;http://www.polarx.net/noctilucentclouds.htm&quot; title=&quot;Noctilucent clouds - Personal Accounts by Brian Whittaker&quot;&gt;n&lt;/a&gt;&lt;a href=&quot;http://www.gi.alaska.edu/ScienceForum/ASF6/676.html&quot; title=&quot;It&apos;s Time Again for Noctilucent Clouds 20 year old article with graph of cloud postion in atmosphere&quot;&gt;t&lt;/a&gt; &lt;a href=&quot;http://home.online.no/~arnedani/astronomy/astrophoto/nlc/40-12.htm&quot; title=27. july 1999 hvervenbukta, oslo, norway&gt;c&lt;/a&gt;&lt;a href=&quot;http://www.baa-aurora.fsnet.co.uk/nlc.htm&quot; title=&quot;British Astronomical Association - Observing Noctilucent Clouds&quot;&gt;l&lt;/a&gt;&lt;a href=&quot;http://www.weather-photography.com/Photos/gallery.php?cat=clouds&amp;subcat=nlc&quot; title=&quot;You are here: Home - Photo gallery - Clouds Mesospheric clouds - Noctilucent clouds&quot;&gt;o&lt;/a&gt;&lt;a href=&quot;http://members.aol.com/gca7sky/glry_b5.htm&quot; title=&quot;One very glorious Noctilucent Cloud by Lyssa Morning Star&quot;&gt;u&lt;/a&gt;&lt;a href=&quot;http://freespace.virgin.net/eclipsing.binary/&quot; title=&quot;NE NLCOG - North East Noctilucent Cloud Observers Group&quot;&gt;d&lt;/a&gt;&lt;a href=&quot;http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=15776&quot; title=&quot;This image was taken July 27, 2003 when the ISS was over central Asia. June and July is the season for noctilucent clouds in the northern hemisphere--they form in the polar mesosphere, generally above 50 degrees latitude&quot;&gt;s&lt;/a&gt;&lt;br&gt;It&apos;s that time of year again. Look to the skies after sunset.  </description>
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		<pubDate>Thu, 01 Jul 2004 00:20:44 -0800</pubDate>
		<category>clouds</category>
		<category>noctilucent</category>
		<dc:creator>y2karl</dc:creator>
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		<link>http://www.metafilter.com/15203/</link>
		<description>&lt;a href="http://www.kloudscape.com/"&gt;&quot;&lt;i&gt;Bringing serenity to your busy workday&lt;/i&gt;&quot;.&lt;/a&gt; Bored with the view from your office? Kloudscape offers ten high-resolution images of clouds taken from 40,000 feet by photographer John Wang. These images are available in a variety of resolutions for use as desktop wallpaper.  </description>
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		<pubDate>Fri, 01 Mar 2002 17:44:35 -0800</pubDate>
		<category>clouds</category>
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		<category>johnwang</category>
		<category>wallpapers</category>
		<category>work</category>
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		<dc:creator>phatboy</dc:creator>
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