Publication Abstracts

Holzer and Hall 2007

Holzer, M., and T.M. Hall, 2007: Low-level transpacific transport. J. Geophys. Res., 112, D09103, doi:10.1029/2006JD007828.

The role of low-level transpacific paths in bringing E-Asian air to the North-American west-coast surface is determined using conditional transit-time distributions. These distributions are computed with the MATCH transport model driven by NCEP reanalysis data. Transpacific transport paths that lie entirely below ∼2.2 km contribute negligibly to the W-coast column burden of E-Asian air. However, during summer such paths account for about half of the climatological W-coast surface mixing ratio of E-Asian air with transit times of less than ∼3 weeks. Summertime transport is characterized by distinct upper- and lower-level transport modes, which form by convective injection and boundary-layer outflow into a summertime marine troposphere of high stability and weak baroclinicity. During the other seasons the climatological E-Asian-air plume organizes into distinct mid-latitude and subtropical parts, particularly evident during spring and fall. The midlatitude plume is characterized by mixing along sloping isentropes, which transports low-level air aloft over the western Pacific and brings mid-tropospheric air to the surface over the eastern Pacific. The subtropical part of the plume is formed by convectively injected air. Lagged, weighted composites show that summertime surface events are charaterized by strong low-level Asian outflow, while for the other seasons surface events are associated with enhanced mixing along sloping isentropes.

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BibTeX Citation

@article{ho09200l,
  author={Holzer, M. and Hall, T. M.},
  title={Low-level transpacific transport},
  year={2007},
  journal={J. Geophys. Res.},
  volume={112},
  pages={D09103},
  doi={10.1029/2006JD007828},
}

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RIS Citation

TY  - JOUR
ID  - ho09200l
AU  - Holzer, M.
AU  - Hall, T. M.
PY  - 2007
TI  - Low-level transpacific transport
JA  - J. Geophys. Res.
VL  - 112
SP  - D09103
DO  - 10.1029/2006JD007828
ER  -

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