|
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Effects of Greenhouse Gas Increase and Stratospheric Ozone Depletion on Stratospheric Mean Age of Air in 1960-2010
  • Published Date:
    2018
  • Source:
    Journal of Geophysical Research-Atmospheres, 123(4), 2098-2110.
Filetype[PDF-1.45 MB]


Details:
  • Personal Author:
  • Description:
    The relative impacts of greenhouse gas (GHG) increase and stratospheric ozone depletion on stratospheric mean age of air in the 1960-2010 period are quantified using the Goddard Earth Observing System Chemistry-Climate Model. The experiment compares controlled simulations using a coupled atmosphere-ocean version of the Goddard Earth Observing System Chemistry-Climate Model, in which either GHGs or ozone depleting substances, or both factors evolve over time. The model results show that GHGs and ozone depleting substances have about equal contributions to the simulated mean age decrease, but GHG increases account for about two thirds of the enhanced strength of the lower stratospheric residual circulation. It is also found that both the acceleration of the diabatic circulation and the decrease of the mean age difference between downwelling and upwelling regions are mainly caused by GHG forcing. The results show that ozone depletion causes an increase in the mean age of air in the Antarctic summer lower stratosphere through two processes: (1) a seasonal delay in the Antarctic polar vortex breakup that inhibits young midlatitude air from mixing with the older air inside the vortex, and (2) enhanced Antarctic downwelling that brings older air from middle and upper stratosphere into the lower stratosphere.

  • DOI:
    http://dx.doi.org/10.1002/2017jd027562
  • Document Type:
    Journal Article
  • Collection(s):
    Office of Oceanic and Atmospheric Research (OAR)
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like:
  1. Decadal changes in summertime reactive oxidized nitrogen and surface ozone over the Southeast United States
    Personal Author:
    Li, J. Y.; Mao, J. Q.; Fiore, A. M.; Cohen, R. C.; Crounse, J. D.; Teng, A. P.; Wennberg, P. O.; Lee, B. H.; Lopez-Hilfiker, F. D.; Thornton, J. A.; Peischl, J.; Pollack, I. B.; Ryerson, T. B.; Veres, P.; Roberts, J. M.; Neuman, J. A.; Nowak, J. B.; Wolfe, G. M.; Hanisco, T. F.; Fried, A.; Singh, H. B.; Dibb, J.; Paulot, F.; Horowitz, L. W.;
    Published Date:
    2018
    Source:
    Atmospheric Chemistry and Physics, 18(3), 2341-2361.
    Description:
    ' Widespread efforts to abate ozone (O-3) smog have significantly reduced emissions of nitrogen oxides (NOx) over the past 2 decades in the Southeast US, a place heavily influenced by both anthropogenic and biogenic emissions. How reactive nitrogen s...
    File Type:
    Filetype[PDF - 1.45 MB]
  2. Estimates of ozone return dates from Chemistry-Climate Model Initiative simulations
    Personal Author:
    Dhomse, S. S.; Kinnison, D.; Chipperfield, M. P.; Salawitch, R. J.; Cionni, I.; Hegglin, M. I.; Abraham, N. L.; Akiyoshi, H.; Archibald, A. T.; Bednarz, E. M.; Bekki, S.; Braesicke, P.; Butchart, N.; Dameris, M.; Deushi, M.; Frith, S.; Hardiman, S. C.; Hassler, B.; Horowitz, L.; Hu, R. M.; Jockel, P.; Josse, B.; Kirner, O.; Kremser, S.; Langematz, U.; Lewis, J.; Marchand, M.; Lin, M. Y.; Mancini, E.; Marecal, V.; Michou, M.; Morgenstern, O.; O'Connor, F. M.; Oman, L.; Pitari, G.; Plummer, D. A.; Pyle, J. A.; Revell, L. E.; Rozanov, E.; Schofield, R.; Stenke, A.; Stone, K.; Sudo, K.; Tilmes, S.; Visioni, D.; Yamashita, Y.; Zeng, G.;
    Published Date:
    2018
    Source:
    Atmospheric Chemistry and Physics, 18(11), 8409-8438.
    Description:
    We analyse simulations performed for the Chemistry-Climate Model Initiative (CCMI) to estimate the return dates of the stratospheric ozone layer from depletion caused by anthropogenic stratospheric chlorine and bromine. We consider a total of 155 sim...
    File Type:
    Filetype[PDF - 7.67 MB]
  3. Twenty Questions and Answers About the Ozone Layer: 2014 Update
    Published Date:
    2014
    Description:
    To help maintain a broad understanding of the relationship between ozone depletion, ODSs, and the Montreal Protocol, this component of the Scientific Assessment of Ozone Depletion: 2014 presents 20 questions and answers about the often-complex scienc...
    File Type:
    Filetype[PDF - 6.27 MB]
  4. Impact of volcanic aerosols on stratospheric ozone recovery
    Personal Author:
    Naik, V.; Horowitz, L. W.; Schwarzkopf, M. D.; Lin, M. Y.;
    Published Date:
    2017
    Source:
    Journal of Geophysical Research-Atmospheres, 122(17), 9515-9528.
    Description:
    We use transient GFDL-CM3 chemistry- climate model simulations over the 2006-2100 period to show how the influence of volcanic aerosols on the extent and timing of ozone recovery varies with (a) future greenhouse gas scenarios (Representative Concent...
    File Type:
    Filetype[PDF - 1.05 MB]
  5. Dependence of model-simulated response to ozone depletion on stratospheric polar vortex climatology
    Personal Author:
    Lin, P.; Paynter, D.; Polvani, L.; Correa, G. J. P.; Ming, Y.; Ramaswamy, V.;
    Published Date:
    2017
    Source:
    Geophysical Research Letters, 44(12), 6391-6398.
    Description:
    We contrast the responses to ozone depletion in two climate models: Community Atmospheric Model version 3 (CAM3) and Geophysical Fuild Dynamics Laboratory (GFDL) AM3. Although both models are forced with identical ozone concentration changes, the str...
    File Type:
    Filetype[PDF - 795.11 KB]