Dear Bala,
Actually in our paper we say:
Kalidindi et al. (2015) showed that with a 20 Tg sulfate aerosol
(SO_4 ) stratospheric loading to balance the radiative forcing
of 2 xCO_2 , broadband diffuse radiation would increase
by 11.2 Wm^-2 compared with the reference run. However
they used a very unrealistic stratospheric aerosol distribution,
with a very small effective radius of 0.17 μm and uniform
geographical distribution.
So we did different experiments, and we used a much more "realistic"
aerosol size and space distribution. I think the differences in the
results are because of the forcing and not the models.
Alan
Alan Robock, Distinguished Professor
Editor, Reviews of Geophysics
Department of Environmental Sciences Phone: +1-848-932-5751
Rutgers University Fax: +1-732-932-8644
14 College Farm Road E-mail: [email protected]
New Brunswick, NJ 08901-8551 USA http://envsci.rutgers.edu/~robock
☮ http://twitter.com/AlanRobock
Watch my 18 min TEDx talk at http://www.youtube.com/watch?v=qsrEk1oZ-54
On 2/10/2016 10:32 PM, Govindasamy Bala wrote:
Interesting result. The conclusions seem to depend on model
configurations.
Our paper published last year in Climate Dynamics (attached) did not
find any such benefit from the enhanced diffused radiation because of
the offset from a reduction in direct light. In fact we found a net
reduction in GPP of about 1 PgC
Looks like Multi-model intercomparison would be needed to resolve this
issue.
On Wed, Feb 10, 2016 at 7:39 PM, Alan Robock
<[email protected] <mailto:[email protected]>> wrote:
Our most recent paper has just been published:
Xia, L., Robock, A., Tilmes, S., and Neely III, R. R.:
Stratospheric sulfate geoengineering could enhance the terrestrial
photosynthesis rate, Atmos. Chem. Phys., 16, 1479-1489,
doi:10.5194/acp-16-1479-2016 <tel:16-1479-2016>, 2016.
http://www.atmos-chem-phys.net/16/1479/2016/
--
Alan Robock
Alan Robock, Distinguished Professor
Editor, Reviews of Geophysics
Department of Environmental Sciences Phone:
+1-848-932-5751 <tel:%2B1-848-932-5751>
Rutgers University Fax:
+1-732-932-8644 <tel:%2B1-732-932-8644>
14 College Farm Road E-mail:
[email protected] <mailto:[email protected]>
New Brunswick, NJ 08901-8551 USA
http://envsci.rutgers.edu/~robock
<http://envsci.rutgers.edu/%7Erobock>
☮ http://twitter.com/AlanRobock
Watch my 18 min TEDx talk at
http://www.youtube.com/watch?v=qsrEk1oZ-54
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With Best Wishes,
-------------------------------------------------------------------
G. Bala
Professor
Center for Atmospheric and Oceanic Sciences
Indian Institute of Science
Bangalore - 560 012
India
Tel: +91 80 2293 3428; +91 80 2293 2505
Fax: +91 80 2360 0865; +91 80 2293 3425
Email: [email protected] <mailto:[email protected]>;
bala.gov <http://bala.gov>@gmail.com <http://gmail.com>
Web:http://caos.iisc.ernet.in/faculty/gbala/gbala.html
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