I should keep my mouth shut until I go through this paper carefully,
but I am highly skeptical of this reported result.
Even if white roofs cause local increases in vertical stability, I
would be very skeptical if increases in surface albedo were to cause
decreases in planetary albedo, except in
It is helpful to frame the Jacobson results on white roofs in terms of
direct and indirect effects. The unambiguous effect of white roofs is
to increase the direct radiative forcing of any aerosols above. To be
precise, brighter surfaces increase absorption by overlying aerosols
and thus increase
...@uci.edu]
Sent: Friday, November 04, 2011 9:46 AM
To: geoengineering
Subject: [geo] Re: White roof snag
It is helpful to frame the Jacobson results on white roofs in terms of
direct and indirect effects. The unambiguous effect of white roofs is
to increase the direct radiative forcing of any aerosols
George,
My name is Charlie :)
It's hard to isolate the effects of BC in nature because of all the
other processes that simultaneously affect regional climate. Snow is
disapppearing more quickly in springtime in Asia than North America.
Flanner et al. ACP 2009 show this is consistent with
Stephen (or John, or Phil, or anyone else) have any of your modellings
of cloud brightening looked at this effect? If you were to brighten
clouds under a dark aerosol (eg Asian Brown Cloud or equivalent off
west africa) might you not be trading warming at the surface for
warming at the dark
Increased column stability may affect hydrological cycle and thus
thermohaline circulation.
This could be problematic and modelling seems wise
A
On Nov 3, 2011 4:15 PM, O Morton omeconom...@gmail.com wrote:
Stephen (or John, or Phil, or anyone else) have any of your modellings
of cloud
