A meta-analysis of plant field studies simulating stratospheric ozone depletion

Oecologia ◽  
2001 ◽  
Vol 127 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Peter S. Searles ◽  
Stephan D. Flint ◽  
Martyn M. Caldwell
Keyword(s):  
Ozone Depletion ◽  
Meta Analysis ◽  
Stratospheric Ozone ◽  
Field Studies ◽  
Stratospheric Ozone Depletion

scholarly journals Drivers of the Recent Tropical Expansion in the Southern Hemisphere: Changing SSTs or Ozone Depletion?

2015 ◽  
Vol 28 (16) ◽  
pp. 6581-6586 ◽  
Author(s):  
Darryn W. Waugh ◽  
Chaim I. Garfinkel ◽  
Lorenzo M. Polvani
Keyword(s):  
Ozone Depletion ◽  
Meta Analysis ◽  
Stratospheric Ozone ◽  
Austral Summer ◽  
Hadley Cell ◽  
Sea Surface ◽  
Relative Role ◽  
Stratospheric Ozone Depletion ◽  
Antarctic Ozone

Abstract Observational evidence indicates that the southern edge of the Hadley cell (HC) has shifted southward during austral summer in recent decades. However, there is no consensus on the cause of this shift, with several studies reaching opposite conclusions as to the relative role of changes in sea surface temperatures (SSTs) and stratospheric ozone depletion in causing this shift. Here, the authors perform a meta-analysis of the extant literature on this subject and quantitatively compare the results of all published studies that have used single-forcing model integrations to isolate the role of different factors on the HC expansion during austral summer. It is shown that the weight of the evidence clearly points to stratospheric ozone depletion as the dominant driver of the tropical summertime expansion over the period in which an ozone hole was formed (1979 to late 1990s), although SST trends have contributed to trends since then. Studies that have claimed SSTs as the major driver of tropical expansion since 1979 have used prescribed ozone fields that underrepresent the observed Antarctic ozone depletion.

scholarly journals Adsorption Equilibrium of 1, 1-Dichloro-1-fluoroethane (HCFC-141b) on a Hydrophobic Zeolite

1998 ◽  
Vol 16 (2) ◽  
pp. 67-75 ◽  
Author(s):  
Wen-Tien Tsai ◽  
Ching-Yuan Chang ◽  
Chih-Yin Ho
Keyword(s):  
Experimental Data ◽  
Free Energy ◽  
Thermodynamic Properties ◽  
Adsorption Isotherms ◽  
Ozone Depletion ◽  
Adsorption Equilibrium ◽  
Stratospheric Ozone ◽  
Stratospheric Ozone Depletion ◽  
Equilibrium Isotherms ◽  
Entropy Of Adsorption

Of the major replacements for chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) are now accepted as being prime contributors to stratospheric ozone depletion. As a consequence, the development of adsorbents capable of adsorbing and recovering specific HCFCs has received great attention. This paper describes an investigation of the adsorption equilibrium of 1, 1-dichloro-1-fluoroethane (HCFC-141b) vapour on a commercial hydrophobic zeolite. The corresponding Henry, Freundlich and Dubinin–Radushkevich (D–R) equilibrium isotherms have been determined and found to correlate well with the experimental data. Based on the Henry adsorption isotherms obtained at 283, 303 and 313 K. thermodynamic properties such as the enthalpy, free energy and entropy of adsorption have been computed for the adsorption of HCFC-141b vapour on the adsorbent. The results obtained could be useful in the application of HCFC adsorption on the hydrophobic zeolite studied.

scholarly journals Northern Hemisphere Stratospheric Ozone Depletion Caused by Solar Proton Events: The Role of the Polar Vortex

2018 ◽  
Vol 45 (4) ◽  
pp. 2115-2124 ◽  
Author(s):  
M. H. Denton ◽  
R. Kivi ◽  
T. Ulich ◽  
M. A. Clilverd ◽  
C. J. Rodger ◽  
...  
Keyword(s):  
Northern Hemisphere ◽  
Ozone Depletion ◽  
Stratospheric Ozone ◽  
Polar Vortex ◽  
Solar Proton ◽  
Stratospheric Ozone Depletion ◽  
Solar Proton Events
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