Publication Abstracts

Hall and Waugh 2000

Hall, T.M., and D.W. Waugh, 2000: Stratospheric residence time and its relationship to mean age. J. Geophys. Res., 105, 6773-6782, doi:10.1029/1999JD901096.

Transport inaccuracies in stratospheric models are a major source of uncertainty in predicting the environmental impact of trace gases with stratospheric source, such as emissions from high-flying aircraft. Because there are no observed tracers of stratospheric aircraft emissions, a direct evaluation of the models' transport of the emissions is not possible. Here we examine the relationship between the stratospheric residence time τR for tracers of midlatitude stratosphere source and the mean age Γ, a transport diagnostic for which observations are available and have been used to evaluate stratospheric models. Employing a representation of the stratosphere that includes the basic kinematic features of the global circulation, we find that τR and Γ are correlated over a range of plausible circulations, but that the correlation is imperfect. A major (but not sole) limitation on Γ as a proxy for τR is the midlatitude tropopause height ZM. Elevating ZM reduces τR significantly, while Γ is only weakly affected. The relationship between τR and Γ seen among the participants of a recent stratospheric model intercomparison is consistent with this analysis.

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BibTeX Citation

  author={Hall, T. M. and Waugh, D. W.},
  title={Stratospheric residence time and its relationship to mean age},
  journal={Journal of Geophysical Research},

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RIS Citation

ID  - ha04200b
AU  - Hall, T. M.
AU  - Waugh, D. W.
PY  - 2000
TI  - Stratospheric residence time and its relationship to mean age
JA  - J. Geophys. Res.
JO  - Journal of Geophysical Research
VL  - 105
SP  - 6773
EP  - 6782
DO  - 10.1029/1999JD901096
ER  -

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