http://www.earthzine.org/2008/08/28/changing-sun-changing-earth/ Fostering Earth Observation and Global Awareness Fri, 05 Mar 2010 14:31:55 -0800 http://wordpress.org/?v=2.8.6 hourly 1 http://www.earthzine.org/2008/08/28/changing-sun-changing-earth/comment-page-1/#comment-1068 Philip Lloyd Fri, 19 Jun 2009 09:02:00 +0000 http://www.earthzine.org/?p=81320#comment-1068 Something seems to have gone wrong with the previous comment, which should have read: Figure 4 interests me, because it shows the altitudes at which radiation of a certain wavelength is attenuated - <100nm at ~120km, <300nm at ~ 25km. A critical question is where does the <240nm radiation energy fall to zero. Some calculations I have done indicate ~80km, and these seem confirmed by early uv spectra. But if that is the case, where does the energy come from to form ozone at 25km? Something seems to have gone wrong with the previous comment, which should have read:
Figure 4 interests me, because it shows the altitudes at which radiation of a certain wavelength is attenuated – <100nm at ~120km, <300nm at ~ 25km. A critical question is where does the <240nm radiation energy fall to zero. Some calculations I have done indicate ~80km, and these seem confirmed by early uv spectra. But if that is the case, where does the energy come from to form ozone at 25km?

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