Dear Stephen,
I would just like to clarify that your statement is not quite correct
'that all monsoon areas show reduced precipitation in all models'.
The EOS paper states:
'All monsoon areas show reduced precipitation, manifested as reduced
numbers of intense precipitation events.'
Precipitation and evaporation are reduced over land for most of the
monsoonal regions in summer, however, not for all (Australia) and not
for all the models, considering a G1 experiment (very strong forcing).
All the models agree on the sign of change for East Asia and North and
South America, as found in Tilmes et al., 2013, (in revision). But it is
true that months with largest precipitation show a reduction for all
monsoonal regions in summer.
The reduction of precipitation in applying SRM is coupled to the fast
response, controlled by changes in stability, clouds, stomatal
resistance, etc. in the models. I don't see how you would design an
idealize experiment that would take the phase of the monsoon into
account to improve the reduction of the hydrological cycle?
Simone
Dear Alan
Thank you for an interesting paper. I note that you used uniform solar
reduction and found that all monsoon areas show reduced precipitation in
all models.
I hope that your next paper will study non-uniform solar reduction
planned according to the phase of the monsoon, the state of the el Nino
la Nina oscillation and sensitive regions.
Stephen
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Emeritus Professor of Engineering Design School of Engineering
University of Edinburgh Mayfield Road Edinburgh EH9 3JL Scotland
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On 14/08/2013 00:14, Alan Robock wrote:
Kravitz, Ben, Alan Robock, and Peter Irvine, 2013:Robust results from
climate model simulations of geoengineering, /Eos/, *94*, 292,
doi:10.1002/2013EO330005.
--
Alan Robock
Alan Robock, Distinguished Professor
Editor, Reviews of Geophysics
Director, Meteorology Undergraduate Program
Associate Director, Center for Environmental Prediction
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 USAhttp://envsci.rutgers.edu/~robock
http://twitter.com/AlanRobock
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