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    Re: (Fwd) The Most Anomalous Refraction Yet or What ?
    From: Brad Morris
    Date: 2009 Aug 4, 14:16 -0400

    Hi Marcel
    It took me a bit of time to realize that you are differentiating between two atmospheric effects.
    1) Omega Sun.
    2) Inversion Sun.
    Upon investigating these a bit, I came across
    which has wonderful pictures of these and other atmospheric effects, to include the 'green flash'.
    Best Regards
    -----Original Message-----
    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Marcel Tschudin
    Sent: Tuesday, August 04, 2009 2:06 PM
    To: NavList@fer3.com
    Subject: [NavList 9334] Re: (Fwd) The Most Anomalous Refraction Yet or What ?
    George you wrote:
    > However, the picture does show a bit of interesting atmospheric disturbance,
    > in that there's an inversion occurs within the lowest few minutes near the
    > horizon, causing the main, highly overexposed, Sun disc to flare out at its
    > lower limb, just where it touches the horizon.
    The Omega-sun shows up with super-adiabatic lapse rates, i.e.
    temperature gradients much less than -10�C/km. Inversions are
    generally related to positive temperature gradients (where the sea is
    cold and the air warm), they produce a different picture of the sun,
    not an Omega-sun.
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