[geo] Solar irradiance reduction to counteract radiative forcing from a quadrupling of CO2: climate responses simulated by four earth system models

[Andrew Lockley]

Don't think this has gone out yet - apologies if it has
Full text link (open access - yey!):
http://www.earth-syst-dynam.net/3/63/2012/esd-3-63-2012.pdf
IMO solar-constant adjustment is insufficiently subtle to address
aerosol projects, especially at extreme latitudes.

A

Solar irradiance reduction to counteract radiative forcing from a
quadrupling of CO2: climate responses simulated by four earth system
models

Abstract. In this study we compare the response of four
state-of-the-art Earth system models to climate engineering
under scenario G1 of two model intercomparison projects:
GeoMIP (Geoengineering Model Intercomparison Project)
and IMPLICC (EU project “Implications and risks of engineering
solar radiation to limit climate change”). In G1,
the radiative forcing from an instantaneous quadrupling of
the CO2 concentration, starting from the preindustrial level,
is balanced by a reduction of the solar constant. Model responses
to the two counteracting forcings in G1 are compared
to the preindustrial climate in terms of global means
and regional patterns and their robustness. While the global
mean surface air temperature in G1 remains almost unchanged
compared to the control simulation, the meridional
temperature gradient is reduced in all models. Another robust
response is the global reduction of precipitation with
strong effects in particular over North and South America
and northern Eurasia. In comparison to the climate response
to a quadrupling of CO2 alone, the temperature responses are
small in experiment G1. Precipitation responses are, however,
in many regions of comparable magnitude but globally
of opposite sign.

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[geo] Re: Review paper on Arctic methane mitigation

[Michael Hayes]

Hi Folks,
 
I'm currently designing an agroponics system for my 18 ac. lake which will 
harvest lake bed methane to help heat/power the system.
 
The relevent aspect of this work, to the Stolaroff paper, is the means of 
harvesting the lake bed methane. The anchoring system will be a simple 
arrangement of plastic/rubber film using a light weight frame and a vaccum 
hose/pump.
 
I have no estimates of the amount which will be harvested and the work will 
take a few months to produce any data. Stolaroff paper points out the need 
for using up this type of methane and the production of food is a good way 
to do so.
 
If any one on  this list is interested in following this project, please 
let me know and I will keep you up to date.
 
Best,
 
Michael  
 
  
On Friday, June 22, 2012 1:35:12 PM UTC-7, Joshuah Stolaroff wrote:

 Hi Folks,

 Some of you may be interested in this paper just published in EST: Review 
 of methane mitigation technologies with application to rapid release of 
 methane from the Arctic http://pubs.acs.org/doi/abs/10.1021/es204686w. 

 Our goal, among others, was to identify technologies that might be used to 
 control Arctic methane emissions. The paper is not about geoengineering *per 
 se*, but we touch on a number of geoengineering techniques. We hope that 
 the technical background provided will stimulate technologists to find more 
 solutions to various methane problems. 

 -Josh 

   --
 Joshuah K. Stolaroff, PhD
 Environmental Scientist
 E Program, Global Security
 *Climate technology and policy*
 Lawrence Livermore National Laboratory
 P.O. Box 808 L-103
 Livermore, CA 94551
 stolaro...@llnl.gov
 925-422-0957



On Friday, June 22, 2012 1:35:12 PM UTC-7, Joshuah Stolaroff wrote: 

 Hi Folks,

 Some of you may be interested in this paper just published in EST: Review 
 of methane mitigation technologies with application to rapid release of 
 methane from the Arctic http://pubs.acs.org/doi/abs/10.1021/es204686w. 

 Our goal, among others, was to identify technologies that might be used to 
 control Arctic methane emissions. The paper is not about geoengineering *per 
 se*, but we touch on a number of geoengineering techniques. We hope that 
 the technical background provided will stimulate technologists to find more 
 solutions to various methane problems. 

 -Josh 

   --
 Joshuah K. Stolaroff, PhD
 Environmental Scientist
 E Program, Global Security
 *Climate technology and policy*
 Lawrence Livermore National Laboratory
 P.O. Box 808 L-103
 Livermore, CA 94551
 stolaro...@llnl.gov
 925-422-0957




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