Heterogeneous or Homogeneous

Heterogeneous or Homogeneous Cirrus cloud creation?
I have been covering the natural homogenous cirrus cloud creation in the Grey Table and the same over the silver iodide poluted sky over the USA in the Turqoise Table.
I mysels believe that heterogeneous cirrus cloud creation happen only in places with heavy air trafic and because of added chemicals like silver iodide ( among others. There are over 100 patents on weather manipulation and artificial cloud creation )
[39]. Also the formation of ice particles by heterogeneous
nucleation often requires
RHi of 110 % or more
[27]
http://aero-net.info/fileadmin/aeronet_files/links/documents/DLR/Schumann_Contrails.pdf
The ice saturation ratio
15 (si ) at the tropopause indicated by the water vapor and temperature measurements
is about 2.3–2.4 (i.e. about 130–140% supersaturation with respect to ice).
Atmos. Chem. Phys. Discuss., 4, 7433–7462, 2004
www.atmos-chem-phys.org/acpd/4/7433/
SRef-ID: 1680-7375/acpd/2004-4-7433
European Geosciences Union 2004
acpd-4-7433-2004-print.pdf
for heterogeneous nucleation, the
freezing thresholds are smaller, probably in the range 110–
140%RHi [e.g.,
Mo
̈hler et al.
, 2006;
DeMott et al.
, 2003]
https://www.uni-frankfurt.de/forschung/profil/sfbs/sfb641/Publikationen/pdf/B9/fusina_etal07.pdf
<fusina_etal07>
See also:
pages/Test 130517.html
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The Grey Table
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The Turquoise Table

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