Publication Abstracts

Yang et al. 2019

Yang, H., D.W. Waugh, C. Orbe, P. Patra, P. Jöckel, J.-F. Lamarque, S. Tilmes, D. Kinnison, J. Elkins, and E. Dlugokencky, 2019: Evaluating simulations of interhemispheric transport: Interhemispheric exchange time versus SF6 age. Geophys. Res. Lett., 46, no. 2, 1113-1120, doi:10.1029/2018GL080960.

Two recent studies using SF6 observations to evaluate interhemispheric transport in two different ensembles of atmospheric chemistry models reached differing conclusions on model performance. We show here that the differing conclusions are due to to the use of different metrics and not differences in the performance of the models. For both model ensembles, the multimodel mean interhemispheric exchange time τex agrees well with observations, but in nearly all models the SF6 age in the southern hemisphere is older than observed. This occurs because transport from the northern extratropics into the tropics is too slow in most models, and the SF6 age is more sensitive to this bias than τex. Thus, simulating τex correctly does not necessarily mean that transport from northern midlatitudes into the southern hemisphere is correct. It also suggests that more attention needs to be paid to evaluating transport from northern mid-latitudes into the tropics.

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BibTeX Citation

@article{ya00200u,
  author={Yang, H. and Waugh, D. W. and Orbe, C. and Patra, P. and Jöckel, P. and Lamarque, J.-F. and Tilmes, S. and Kinnison, D. and Elkins, J. and Dlugokencky, E.},
  title={Evaluating simulations of interhemispheric transport: Interhemispheric exchange time versus SF6 age},
  year={2019},
  journal={Geophys. Res. Lett.},
  volume={46},
  number={2},
  pages={1113--1120},
  doi={10.1029/2018GL080960},
}

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RIS Citation

TY  - JOUR
ID  - ya00200u
AU  - Yang, H.
AU  - Waugh, D. W.
AU  - Orbe, C.
AU  - Patra, P.
AU  - Jöckel, P.
AU  - Lamarque, J.-F.
AU  - Tilmes, S.
AU  - Kinnison, D.
AU  - Elkins, J.
AU  - Dlugokencky, E.
PY  - 2019
TI  - Evaluating simulations of interhemispheric transport: Interhemispheric exchange time versus SF6 age
JA  - Geophys. Res. Lett.
VL  - 46
IS  - 2
SP  - 1113
EP  - 1120
DO  - 10.1029/2018GL080960
ER  -

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