Publication Abstracts

Orbe et al. 2014

Orbe, C., M. Holzer, L.M. Polvani, D.W. Waugh, F. Li, L.D. Oman, and P.A. Newman, 2014: Seasonal ventilation of the stratosphere: Robust diagnostics from one-way flux distributions. J. Geophys. Res. Atmos., 119, no. 1, 293-306, doi:10.1002/2013JD020213.

We present an analysis of the seasonally varying ventilation of the stratosphere using one-way flux distributions. Robust transport diagnostics are computed using GEOSCCM subject to fixed present-day climate forcings. From the one-way flux, we determine the mass of the stratosphere that is in transit since entry through the tropical tropopause to its exit back into the troposphere, partitioned according to stratospheric residence time and exit location. The seasonalities of all diagnostics are quantified with respect to the month of year (a) when air enters the stratosphere, (b) when the mass of the stratosphere is partitioned, and (c) when air exits back into the troposphere. We find that the return flux, within 3 months since entry, depends strongly on when entry occurred: (34±10)% more of the air entering the stratosphere in July leaves poleward of 45°N compared to air that enters in January. The month of year when the air mass is partitioned is also found to be important: The stratosphere contains about six times more air of tropical origin during late summer and early fall that will leave poleward of 45° within 6 months since entering the stratosphere compared to during late winter to late spring. When the entire mass of the air that entered the stratosphere at the tropics regardless of its residence time is considered, we find that (51±1)% and (39±2)% will leave poleward of 10° in the Nothern Hemisphere (NH) and Southern Hemisphere (SH), respectively.

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BibTeX Citation

@article{or04100o,
  author={Orbe, C. and Holzer, M. and Polvani, L. M. and Waugh, D. W. and Li, F. and Oman, L. D. and Newman, P. A.},
  title={Seasonal ventilation of the stratosphere: Robust diagnostics from one-way flux distributions},
  year={2014},
  journal={J. Geophys. Res. Atmos.},
  volume={119},
  number={1},
  pages={293--306},
  doi={10.1002/2013JD020213},
}

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RIS Citation

TY  - JOUR
ID  - or04100o
AU  - Orbe, C.
AU  - Holzer, M.
AU  - Polvani, L. M.
AU  - Waugh, D. W.
AU  - Li, F.
AU  - Oman, L. D.
AU  - Newman, P. A.
PY  - 2014
TI  - Seasonal ventilation of the stratosphere: Robust diagnostics from one-way flux distributions
JA  - J. Geophys. Res. Atmos.
VL  - 119
IS  - 1
SP  - 293
EP  - 306
DO  - 10.1002/2013JD020213
ER  -

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