In sci.space.policy Paul F. Dietz wrote:
Brian Sandle wrote:

The correlation is not a guess.

You're right. It's more of an idiotic canard.

When the sun rises there is not the UV in its rays which there is
later in the day. The sunlight travels through rather more
atmosphere to arrive at earth's surface after rising or before
setting than it does at midday.

An object outside the earth's atmosphere will experience full UV
power for nearly the whole day.

I suggest that the HCl/stratospheric water/alumina cloud mix from a
rocket trail experiences a different UV time/wavelength distribution
from halocarbons rising just above the tropopause. Therefore I would
expect possible variations in chemical species/distribution. Maybe
catalysts are being formed.

http://ess.geology.ufl.edu/HTMLpages.../lecture4.html

[...]
* The most important reaction is between the two chlorine reserviors:
ClONO2 + HCL - Cl2 + HNO3

* Equally important is the fate of the nitric acid (HNO3). It remains
within the PSCs, effectively sequestering the nitrogen family of
compounds that would otherwise react with the active chlorine to
reform chlorine nitrate.
* This process, called denitrification, allows the photochemical
reactions that destroy ozone to run effectively for a long time
without termination.
[...]


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