---------- 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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