{"id":7255,"date":"2013-03-04T21:39:54","date_gmt":"2013-03-05T05:39:54","guid":{"rendered":"http:\/\/blog.kootenay-lake.ca\/?p=7255"},"modified":"2013-03-05T06:34:48","modified_gmt":"2013-03-05T14:34:48","slug":"lacunosus","status":"publish","type":"post","link":"https:\/\/blog.kootenay-lake.ca\/?p=7255","title":{"rendered":"Lacunosus"},"content":{"rendered":"

 <\/p>\n

I went birding, and all I saw was lacunosus—but what spectacular lacunosus it was.<\/p>\n

Lacunosus occurs in thin clouds when bubbles of\u00a0buoyant dry\u00a0air from below the cloud rise and poke holes in the cloud. I have shown pictures of this before<\/a>, but today’s sighting was, if anything, more spectacular.<\/p>\n

When seen (which is not all that often), it usually appears in unsteady wave clouds. When formed from a thin layer of moisture in the atmosphere, a wave cloud does not sit at the lifting-condensation level. As a result, when the amplitude of the wave decreases, the sinking air warms by compression. But, the temperature in the cloud increases more slowly (warms at the moist-adiabatic lapse rate) than the temperature of the air\u00a0below (warms at\u00a0the dry-adiabatic lapse rate). The result is that bubbles of the warmer dry air from below rise and punch holes through the cooler cloud.<\/p>\n

This is the physical understanding of what happenings, but the transient patterns that emerge are clearly worth the price of admission.<\/p>\n

I show three pictures from this morning, and as this was happening in the\u00a0vicinity\u00a0of the Sun, the final image actually shows a touch of iridescence. Granted that this iridescence isn’t quite as spectacular as that seen a few weeks ago<\/a>, but with such a sighting, who is complaining?<\/p>\n

The lacunosus formed and vanished within perhaps five minutes. That is actually a much longer viewing interval than is afforded by most of the birds I see.<\/p>\n

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  I went birding, and all I saw was lacunosus—but what spectacular lacunosus it was. Lacunosus occurs in thin clouds when bubbles of\u00a0buoyant dry\u00a0air from below the cloud rise and poke holes in the cloud. I have shown pictures of … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[12],"tags":[],"class_list":["post-7255","post","type-post","status-publish","format-standard","hentry","category-weather"],"_links":{"self":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/7255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7255"}],"version-history":[{"count":20,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/7255\/revisions"}],"predecessor-version":[{"id":7279,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=\/wp\/v2\/posts\/7255\/revisions\/7279"}],"wp:attachment":[{"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.kootenay-lake.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}