Re: [geo] Re: Washington Post op ed

2015-02-07 Thread Daniel Kirk-Davidoff
ew Revkin; John Latham; > David Keith; arcticmeth...@googlegroups.com; Dr. Adrian Tuck; Ken > Caldeira; Andrew Lockley; Michael MacCracken > *Subject:* Re: [geo] Re: Washington Post op ed > > > > By the way, as a follow up to that, has anyone proposed using this very > same materi

RE: [geo] Re: Washington Post op ed

2015-02-04 Thread David Mitchell
FIPC; Oliver Morton; Andrew Revkin; John Latham; David Keith; arcticmeth...@googlegroups.com; Dr. Adrian Tuck; Ken Caldeira; Andrew Lockley; Michael MacCracken Subject: Re: [geo] Re: Washington Post op ed By the way, as a follow up to that, has anyone proposed using this very same material as

Re: [geo] Re: Washington Post op ed

2015-02-04 Thread nathan currier
By the way, as a follow up to that, has anyone proposed using this very same material as the source of an Arctic geoengineering idea - that is, has anyone proposed something like "cirrus stripping" but for polar stratospheric clouds instead, as a way of helping to cool the Arctic? Might there be a

Re: [geo] Re: Washington Post op ed

2015-02-04 Thread nathan currier
Hi, Michael & Adrian - Thanks so much for all of this, which I personally think is very important material. I found the Sloan-Pollard paper fascinating, in spite of, and maybe partly also because of, the fact that it isn't a new paper, yet seems to inject a fresh and tantalizingly relevant paleocl

Re: [geo] Re: Washington Post op ed

2015-02-04 Thread Michael Hayes
Oliver and List, The primary cloud condensate nuclei for type one polar stratospheric clouds is sulfuric acid. This is a well known and established fact found in atmospheric physics. Here I offer a few reference among the many available: 1) Theoretical and Modeling Studies of the Atmospheric

Re: [geo] Re: Washington Post op ed

2015-02-04 Thread Fred Zimmerman
Do you even need a proposed mechanism? From what I recall, both models and observations struggle at the poles, and we know that we don't want to go forward with SAI without a strong understanding of behavior at the poles. Maybe we should be asking what will we need to do to improve models and obser

Re: [geo] Re: Washington Post op ed

2015-02-04 Thread Oliver Morton
What's the proposed SAI mechanism enhancing PSC? On 4 February 2015 at 01:48, Michael Hayes wrote: > Hi Folks, > > This level of discussion on SAI seems to be premature. We have yet to see > any...any...models concerning the highly predictable increase in Polar > Stratospheric Cloud (PSC) produc

[geo] Re: Washington Post op ed

2015-02-04 Thread Michael Hayes
Hi Folks, This level of discussion on SAI seems to be premature. We have yet to see any...any...models concerning the highly predictable increase in Polar Stratospheric Cloud (PSC) production which will be caused by SAI. This is not a trivial precondition to further discussion. As, the triggeri

[geo] Re: Washington Post op ed

2015-01-31 Thread Russell Seitz
The answer to David and Andy's concern is to have as many thermostats as there are micrclimates. The alternative to top down approaches to SRM is to develop local control of local albedo-- every community has two albedo footprints, one anthropogenic and the other dictated by geography , and t