Michael
If meteorological oscillations behave like most other oscillations you
can increase or reduce their amplitudes by choosing the phase of your
intervention. Quite small impulses can have large effects over long
periods.
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
On 28/01/2014 23:01, Michael Hayes wrote:
It is interesting to view the findings of Aquila et. al. with what is
known about the relationship of the QBO and the ENSO. I did a short
search and found this: The quasi-biennial oscillation and the El Niño
Southern Oscillation:
<http://www-das.uwyo.edu/%7Egeerts/cwx/notes/chap11/qbo_enso.html>
/"The QBO is a regular variation of zonal (i.e. east-west)
stratospheric winds above the equator (Section 12.3). The ENSO, on the
other hand, is highly irregular and involves near-surface winds as
well as the ocean. Both oscillations have a clear effect on the
frequency of hurricanes in the Atlantic, amongst others. /
//
/Notwithstanding their obvious differences, there appears to be a weak
correlation between the QBO and the ENSO. An examination of the QBO
signal over the Atlantic and Africa shows a correlation with the
Southern Oscillation Index in the early part of the year (1). Strong
La Niña events tend to occur when the QBO is in its westerly phase
over the equatorial Pacific./
//
/A record of SOI values for 1876 - 1995 reveals that the ENSO can be
decomposed in two cycles: a quasi-biennial rhythm and a low frequency
(5-10 year) variation (2). Both signals were notably weak during
1921-41 (when ENSO activity was suppressed), and both were strong
prior to 1920 and after the mid 1960�s. The quasi-biennial ENSO rhythm
appears to be a harmonic oscillation in equatorial Pacific
atmosphere-ocean system, and it was in sync with the QBO in 1879-99
and 1963-83. For the quasi-biennial ENSO rhythm, sea-level pressures
(the SOI) and SST values (El Niño) are notably well correlated, in
particular in 1879-99 and 1963-83."./ My yellow highlight/./
The direct surface cooling of the Subtropical Convergance Zones
(STCZ) may be needed if SSI is to be deployed. Directly cooling the
STCZs with MCB and or Large Scale Mariculture (LSM) would obviously
effect both wind and ocean surface possibly countering SSIs' effect on
the QBO/ENSO relationship. Having the Aquila study would seem to make
modeling MCB and or LSM effects on the QBO streightforward.
Best,
Michael
On Monday, January 27, 2014 9:13:03 AM UTC-8, Motoko wrote:
/Aquila, V.; Garfinkel, C. I.; Newman, P. A.; Oman, L. D.; Waugh,
D. W. (2014): Modifications of the quasi-biennial oscillation by a
geoengineering perturbation of the stratospheric aerosol layer.
(accepted article). In Geophys. Res. Lett. DOI
10.1002/2013GL058818 ./
"This paper examines the impact of geoengineering via
stratospheric sulfate aerosol on the quasi-biennial oscillation
(QBO) using the NASA Goddard Earth Observing System (GEOS-5)
Chemistry Climate Model."
Link
<http://onlinelibrary.wiley.com/doi/10.1002/2013GL058818/abstract>
(http://onlinelibrary.wiley.com/doi/10.1002/2013GL058818/abstract
<http://onlinelibrary.wiley.com/doi/10.1002/2013GL058818/abstract>, pay
wall)
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