tag:blogger.com,1999:blog-4142988674703954802.post4011586171423466537..comments2024-03-11T04:54:26.827-07:00Comments on THE HOCKEY SCHTICK: Why water vapor slows cooling at night & slows warming during the dayUnknownnoreply@blogger.comBlogger3125tag:blogger.com,1999:blog-4142988674703954802.post-67945470470696645242015-12-14T10:01:14.843-08:002015-12-14T10:01:14.843-08:00Albedo is measured by satellites and is indeed ~30...Albedo is measured by satellites and is indeed ~30%MShttps://www.blogger.com/profile/06714540297202434542noreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-62224774922320922112015-12-14T04:04:19.896-08:002015-12-14T04:04:19.896-08:00In the paper Sweger says that the earths albedo i...In the paper Sweger says that the earths albedo is 30% therefore its emissivity is .7<br /><br />How on earth does he come to that conclusion?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4142988674703954802.post-76742665882887343952014-11-20T14:25:10.619-08:002014-11-20T14:25:10.619-08:00The high specific heat of water vapour is relevant...The high specific heat of water vapour is relevant but there is another mechanism involved as well.<br /><br />Being lighter than air water vapour rises higher and faster especially when the latent heat of condensation is released.<br /><br />The higher it goes the more of its kinetic energy is converted to gravitational potential energy which is then available to be returned to kinetic energy in the descent of dry air.<br /><br />So:<br /><br />i) During the ascent the vapour cools the surface by taking kinetic energy upwards and converting it to gravitational potential energy. Only a portion of its energy is lost to space by radiation.<br /><br />ii) During the descent the dry air warms the surface by converting gravitational potential energy back to kinetic energy.<br /><br />It is the energy (kinetic energy and gravitational potential energy combined) locked into the convective cycle of uplift and descent which raises the surface temperature some 33C higher than the S-B expectation.<br /><br />Not GHGsStephen Wildenoreply@blogger.com