List cc Ken, John Nissen, Stephen Salter
Ken’s message re cloud brightening seems to be important . Maybe well
known to those close to the field, but I found much new - especially between
about 6 and 18 minutes in Part 4 ( https://www.youtube.com/watch?v=b3D6mx5SQo8
) . Nice to see credit give to Stephen.
Dr. Neukermans and a very few others have done a lot of impressive
work (as volunteers). His speaking style I found convincing (including all of
video #3 - none on cloud brightening). I liked that some unpromising
approaches were also described. Only a little new (but obviously well
justified) money is now being sought.
One question I pose on behalf of John Nissen and others in AMEG is why
the Arctic’s lack of sunlight (mentioned at about the 18 minute mark) is
critical. On an annual basis I believe the insolation is about the world wide
average (as the sun doesn’t set for quite a few months). Not knowing enough
on the whole topic, this technical advance would seem to be very good news for
John/AMEG - if this Arctic solar issue can still be on the table.
There are quite a few publications on this work, with a few of the most
recent at
https://www.researchgate.net/publication/260755971_Sub-micrometer_salt_aerosol_production_intended_for_marine_cloud_brightening
http://www.economist.com/news/science-and-technology/21635983-scientific-studies-techniques-deliberately-modifying-climate-are
http://articles.latimes.com/2014/mar/04/nation/la-na-climate-engineering-20140305/2
Ron
On May 28, 2015, at 9:04 AM, Ken Caldeira <[email protected]> wrote:
> Five YouTube videos of the 12 May event are available here:
>
> https://www.youtube.com/playlist?list=PL4E3D946BECCF7DE3
>
> The event is described here:
>
> http://www.sri.com/newsroom/events/cafe-scientifique-silicon-valley-sri-two-novel-approaches-mitigating-climate-change
>
> Part 1: Ken on solar geo and strat aerosols:
> https://www.youtube.com/watch?v=-Y6p-B-KbiQ
> Part 2: Ken on solar geo and strat aerosols:
> https://www.youtube.com/watch?v=wo5Y-SPrybE
> Part 3: Armand on marine cloud brighening:
> https://www.youtube.com/watch?v=ZbpYGwu4KNA
> Part 4: Armand on marine cloud brighening:
> https://www.youtube.com/watch?v=b3D6mx5SQo8
> Part 5: Ken and Armand answer questions:
> https://www.youtube.com/watch?v=9KS9Nbe3Wzs
>
> Cafe Scientifique Silicon Valley @ SRI: Reflecting Sunlight to Cool Earth's
> Climate: Emulating Volcanoes and Brightening Marine Clouds
> May 12, 2015
> SRI - Menlo Park, CA
> This free Cafe event will feature presentations by two thought leaders on
> climate change:
>
>
> Ken Caldeira (l); Armand Neukermans (r)
> Solar Geoengineering and Climate Change: Nearly everyone understands that the
> most effective way to reduce environmental risk associated with climate
> change is to deeply cut greenhouse gas emissions as soon as possible, yet
> emissions and atmospheric concentrations of greenhouse gases continue to
> increase. If current emissions trends continue, by the end of this century,
> nearly every summer in the tropics will be hotter than the hottest summer yet
> on record, raising the possibility of widespread crop failures and famine. If
> climate change does prove truly catastrophic, the only feasible way to cool
> the Earth rapidly would be to use solar geoengineering technologies, for
> example, by emulating the cooling effects of volcanoes. While it is fairly
> certain that Earth's climate can be cooled in this way, it is far less
> certain whether such approaches could ever really reduce overall risk and
> damage. Dr. Ken Caldeira, a senior climate scientist at the Carnegie
> Institution for Science, will present the science of solar geoengineering and
> discuss what this science might mean for society.
>
> Marine Cloud Brightening: The National Academy of Sciences recently called
> for research into “geoengineering“. Dr. Armand Neukermans will describe the
> efforts of a group of retired scientists and engineers to develop a spray
> system that might enable a study of the feasibility of marine cloud
> brightening (MCB) for climate cloud studies, as well as possible climate
> intervention. MCB aims to increase the reflectivity of low-hanging ocean
> clouds, thereby reflecting more sunlight and cooling the planet. This might
> be done by increasing the droplet concentration in the clouds by spraying
> seawater from oceangoing ships. The proposed systems aims to create 1015
> cloud nuclei from a glass of seawater. MCB ( if ever needed) might
> conceivably be used globally or locally (e.g., for arctic melt shielding,
> hurricane cooling, reef preservation, or fog belt restoration).
>
> About the Speakers
> Dr. Ken Caldeira is a climate scientist working for the Carnegie Institution
> for Science, Department of Global Ecology at Stanford University. He
> investigates issues related to climate, carbon, and energy systems. His
> primary tools are climate and the carbon cycle models, although he does field
> work related to ocean acidification. Dr. Caldeira co-authored a recent
> National Academies report, Climate Intervention: Reflecting Sunlight to Cool
> Earth. A free PDF version is available.
>
> Dr. Armand Neukermans has held research and management positions at
> KLA-Tencor, Hewlett-Packard, Xerox, and General Electric, and founded Xros,
> an optical switch company. He is the author of 40 publications and the
> inventor of more than 75 patents in diverse fields. He was named Silicon
> Valley “Inventor of the year” in 2001. Since his retirement, he has been
> involved in environmental projects, such as the foundation of the Big Sur
> Environmental Institute, and in fostering the causes of social entrepreneurs.
> He holds EE and ME degrees from Louvain University, and a Ph.D. in applied
> physics from Stanford University.
>
> - See more at:
> http://www.sri.com/newsroom/events/cafe-scientifique-silicon-valley-sri-two-novel-approaches-mitigating-climate-change#sthash.S562iCyX.dpuf
>
>
> _______________
> Ken Caldeira
>
> Carnegie Institution for Science
> Dept of Global Ecology
> 260 Panama Street, Stanford, CA 94305 USA
> +1 650 704 7212 [email protected]
> website: http://dge.stanford.edu/labs/caldeiralab/
> blog: http://kencaldeira.org
> @KenCaldeira
>
> My assistant is Dawn Ross <[email protected]>, with access to
> incoming emails.
> Postdoc positions:
> https://jobs.carnegiescience.edu/jobs/postdoctoral-opportunity-global-climate-modeling/
>
>
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