This is certainly not unexpected. We wrote a paper on this 25 years ago:
Vinnikov, Konstantin Ya., Alan Robock, Ronald J. Stouffer and Syukuro
Manabe, 1996: Vertical patterns of free and forced climate variations.
/Geophys. Res. Lett./, *23*, 1801-1804.
http://climate.envsci.rutgers.edu/pdf/VinnikovVertical96GL01736.pdf
And I don't think it is an important reason to do CDR. There are other
good reasons, but this does not affect us nearly as much as other
impacts of global warming.
Alan
Alan Robock, Distinguished Professor
Chair-Elect, AGU College of Fellows
Associate Editor, /Reviews of Geophysics/
Department of Environmental Sciences Phone: +1-848-932-5751
Rutgers University E-mail:
[email protected]
14 College Farm Road http://people.envsci.rutgers.edu/robock
New Brunswick, NJ 08901-8551 ☮ https://twitter.com/AlanRobock
"I've got a feeling 21 is going to be a good year" - The Who from the
album /Tommy/
Signature
On 5/13/2021 6:33 AM, Andrew Lockley wrote:
---------- Forwarded message ---------
From: *Tom Goreau* <[email protected]
<mailto:[email protected]>>
Date: Thu, 13 May 2021, 11:03
Subject: [CDR] CO2 shrinks the stratosphere
To: 'Greg Rau' via Carbon Dioxide Removal
<[email protected]
<mailto:[email protected]>>
*Yet another unexpected reason why CDR is needed!*
**
*Stratospheric contraction caused by increasing greenhouse gases*
To cite this article before publication: Petr Pisoft et al 2021
Environ. Res. Lett. in press https://doi.org/10.1088/1748-9326/abfe2b
<https://doi.org/10.1088/1748-9326/abfe2b>
P. Pisoft1 , P. Sacha1,2, L. M. Polvani3 , J. A. Añel4 , L. de la
Torre4 , R. Eichinger1,5,6, U. Foelsche7 , P. Huszar1 , C. Jacobi8 ,
J. Karlicky1,2, A. Kuchar1,8, J. Miksovsky1 , M. Zak1 , H. E. Rieder2
_Abstract_ Rising emissions of anthropogenic greenhouse gases (GHG)
have led to tropospheric warming and stratospheric cooling over recent
decades. As a thermodynamic consequence, the troposphere has expanded
and the rise of the tropopause, the boundary between the troposphere
and stratosphere, has been suggested as one of the most robust
fingerprints of anthropogenic climate change. Conversely, at altitudes
above ~55 km (in the mesosphere and thermosphere) observational and
modeling evidence indicates a downward shift of the height of pressure
levels or decreasing density at fixed altitudes. The layer in between,
the stratosphere, has not been studied extensively with respect to
changes of its global structure. Here we show that this atmospheric
layer has contracted substantially over the last decades, and that the
main driver for this are increasing concentrations of GHG. Using data
from coupled chemistry-climate models we show that this trend will
continue and the mean climatological thickness of the stratosphere
will decrease by 1.3 km following representative concentration pathway
6.0 by 2080. We also demonstrate that the stratospheric contraction is
not only a response to cooling, as changes in both tropopause and
stratopause pressure contribute. Moreover, its short emergence time
(less than 15 years) makes it a novel and independent indicator of GHG
induced climate change.
**
*Thomas J. F. Goreau, PhD
President, Global Coral Reef Alliance*
*Chief Scientist, Blue Regeneration SL
President, Biorock Technology Inc.*
*Technical Advisor, Blue Guardians Programme, SIDS DOCK*
*37 Pleasant Street, Cambridge, MA 02139*
*[email protected] <mailto:[email protected]>
www.globalcoral.org <http://www.globalcoral.org>
Skype: tomgoreau
Tel: (1) 617-864-4226 (leave message)*
*Books:*
*Geotherapy: Innovative Methods of Soil Fertility Restoration, Carbon
Sequestration, and Reversing CO2 Increase*
http://www.crcpress.com/product/isbn/9781466595392
<http://www.crcpress.com/product/isbn/9781466595392>
*Innovative Methods of Marine Ecosystem Restoration*
http://www.crcpress.com/product/isbn/9781466557734
<http://www.crcpress.com/product/isbn/9781466557734>
*No one can change the past, everybody can change the future*
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