Here are some comments pertaining to Andrew's initial questions. Loss of
ozone would have an impact on several health aspects. This lecture by
Jose-Luis Jimenez maybe a good start on a literature search to assess
optical impacts on UV.
http://cires1.colorado.edu/jimenez/AtmChem/CHEM-5151_S05_L16.pdf
On 4/7/2019 3:28 PM, Russell Seitz wrote:
Two centuries ago Humboldt, Arago and others introduced
'Cyanometers', color wheels usedto measure how blue the sky appeared
as altitude and locales varied. As I've already asked the inventor
of the hand held Dobson Unit meter , Forrest Mims, to develop
parallel gadgets for water reflectivity and ocean color, perhaps
Andrew should request an electronic sky color gizmo-- the self
driving car folk at Tesla and Apple might add the cost to their Due
Diligence bill.
On Sunday, April 7, 2019 at 12:05:59 PM UTC-4, Andrew Lockley wrote:
For example, if it made skies whiter, it could potentially be more
difficult (or easier) for drivers to pick out pedestrians. Over
billions of people and decades, this could have a significant effect.
Andrew Lockley
On Sun, 7 Apr 2019, 17:01 Douglas MacMartin, <dgm...@cornell.edu
<javascript:>> wrote:
There’s not that much ground-based astronomy in UV, relative
to optical and IR astronomy.
Impact on optical astronomy is straightforward; if you lose 5%
of the direct light, you need 5% longer integration time to
get same number of photons.
Impact on IR astronomy is less obvious, as limited by the
background from the sky, which depends on water vapour and
temperature through the atmospheric column (with most
telescopes being at 14000’ or so). Shouldn’t be hard to
estimate, I’ve never gotten someone interested enough to do
the calculations but I could try again (my other job is being
on the design team for the Thirty Meter Telescope).
I did ask people whether they noted anything after Pinatubo,
and the answer I got was no… that doesn’t mean there wasn’t an
effect, but it wasn’t something that the astronomy community
by and large remembered.
*From:*geoengi...@googlegroups.com <javascript:>
<geoengi...@googlegroups.com <javascript:>> *On Behalf Of
*Russell Seitz
*Sent:* Sunday, April 7, 2019 9:31 AM
*To:* geoengineering <geoengi...@googlegroups.com <javascript:>>
*Subject:* [geo] Re: SRM optical impacts
Why would reductions in the downwelling tropospheric light
flux increase any of the above? I'd instead ask
instrumental astromomers what they think SO2 scattering would
do in the UV , as they have a lot to lose from scattered
light, which can cost them contrast and degrade the signal
to noise ratio in interferometry and spectroscopy.
Try the Magellan and OWL teams
On Wednesday, April 3, 2019 at 7:47:35 AM UTC-4, Andrew
Lockley wrote:
Has there been any investigation of SRM effects on vision?
Eg perceived glare, macular degeneration, corneal sunburn,
vision development in infants, object recognition when
driving (and their equivalent in animals)?
Andrew Lockley
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New Mexico Institute of Mining and Technology
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