Dear Stephen--The atmospheric transport of gases and aerosols differs.
For gases, atmospheric mixing dominates any consideration of different
molecular weights up to altitudes of five to ten tens of kilometers. For
aerosols, their mass and size introduce a fall rate that, depending on
size, generally takes over in the upper troposphere/lower stratosphere,
so say by ten kilometers or so. So CFCs get up to the stratospheric
ozone layer by atmospheric mixing, generally in air in low latitudes.
Getting aerosols into the stratosphere (unless they are chemically
formed there, such as in the stratospheric ozone hole region) generally
takes some sort of major injection mechanism like a volcanic eruption
(or very major firestorm).
Mike
On 1/30/22 4:50 AM, SALTER Stephen wrote:
Clive
How do you think that stuff got up to the Ozone hole?
Stephen
*From:* healthy-planet-action-coalit...@googlegroups.com
<healthy-planet-action-coalit...@googlegroups.com> *On Behalf Of
*Clive Elsworth
*Sent:* Saturday, January 29, 2022 11:22 PM
*To:* SALTER Stephen <s.sal...@ed.ac.uk>
*Cc:* Ron Baiman <rpbai...@gmail.com>; Sev Clarke <sevcla...@me.com>;
Peter Wadhams <peter.wadh...@gmail.com>; Chris Vivian
<chris.vivi...@btinternet.com>; H simmens <hsimm...@gmail.com>; John
Nissen <johnnissen2...@gmail.com>; Robert Tulip
<rtulip2...@yahoo.com.au>; geoengineering
<geoengineering@googlegroups.com>; Planetary Restoration
<planetary-restorat...@googlegroups.com>; Shaun Fitzgerald
<sd...@cam.ac.uk>; Hugh.Hunt <he...@cam.ac.uk>; Daphne Wysham
<dap...@methaneaction.org>; healthy-planet-action-coalition
<healthy-planet-action-coalit...@googlegroups.com>; Dermott Reilly
<dermott.rei...@nanolandglobal.com>
*Subject:* Marine Cloud Brightening
*This email was sent to you by someone outside the University.*
You should only click on links or attachments if you are certain that
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Stephen
I confess I'm not sufficiently familiar with atmospheric physics to
say whether aerosol particles released under the Arctic stratosphere
would substantially move up into it.
Either way, Marine Cloud Brightening seems the safer option to me for
the reasons you have given on numerous occasions. The question is if
it can be ready in time and with sufficient social license.
I think you're aware of the University of Washington's MCB work:
https://faculty.washington.edu/robwood2/wordpress/?page_id=954
The video on that page is high quality and only about a month old. I
wonder if some collaboration might help speed things up?
Clive
On 29/01/2022 21:03 SALTER Stephen <s.sal...@ed.ac.uk> wrote:
Clive
Here is something about the Brewer Dobson velocity.
Stephen
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