Hi All
Piers Forster's concern in his video about spray coagulation would be
reduced if his model had used mono-disperse drops with an electrostatic
charge as specified in our 2008 paper on sea-going hardware.
His concern about detecting the effectiveness is because the cloud
contrast change needed to save humanity is below the detection threshold
of the human eye. However contrast can be enhanced by the superposition
of satellite aligned images. I have previously circulated some to this
group and hope that the idea will give quantitative results in a few days.
The picture of spray plumes shown in box 3 of his IAGP practicalities
note must have been using warm air from a chimney. Depending on the
temperature and relative humidity of the surrounding ambient air there
will be several degrees of temperature drop due to the latent heat of
evaporation. The increase of density will lead to a rapid fall of the
cooled air which will spread out over the sea surface like a spilt
liquid until it has been warmed by the large area of contact with sea.
You can show this fall and dispersion very cheaply with a pond fogger,
£19.99 from Maplin. We want this dispersion because a low dose over a
large area is more effective than a high point dose.
Forster seems to be ignoring completely the idea of coded modulation of
CCN concentration in climate models even though the satisfactory
operation was demonstrated by Ben Parkes doing a PhD in Forster's own
Department at Leeds in 2012. This might allow us to get an
everywhere-to-everywhere transfer function of marine cloud brightening
and win-win result with more rain in dry places and less in wet. The
high frequency response means that we can give a tactical spraying based
local day-to-day observations.
It is a puzzle that the Parkes thesis has, yet again, vanished from the
Leeds University website.
Stephen
Emeritus Professor of Engineering Design. School of Engineering.
University of Edinburgh. Mayfield Road. Edinburgh EH9 3JL. Scotland
[email protected] Tel +44 (0)131 650 5704 Cell 07795 203 195
WWW.see.ed.ac.uk/~shs YouTube Jamie Taylor Power for Change
On 28/12/2014 20:03, Andrew Lockley wrote:
Integrated Assessment of Geoengineering
Proposals…:http://youtu.be/FFjzzfCLCqw <http://youtu.be/FFjzzfCLCqw>
Poster's note : I personally have found it very difficult to access
and appraise the science behind the IAGP project. Despite this, a vast
amount of publicity has been obtained for the project. I think the
IAGP team could do more to encourage early, in-depth access to their
material, particularly bearing in mind the huge media interest.
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