Publication Abstracts

Orbe et al. 2015

Orbe, C., P.A. Newman, D.W. Waugh, M. Holzer, L.D. Oman, F. Li, and L.M. Polvani, 2015: Airmass origin in the Arctic. Part I: Seasonality. J. Climate, 28, no. 12, 4997-5014, doi:10.1175/JCLI-D-14-00720.1.

The first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a present-day climate integration of the Goddard Earth Observing System Chemistry-Climate Model (GEOSCCM) reveal that the majority of air in the Arctic below 700 mb last contacted the PBL poleward of 60°N. By comparison, 62% (±0.8%) of the air above 700 mb originates over Northern Hemisphere midlatitudes (i.e., "midlatitude air"). Seasonal variations in the airmass fractions above 700 mb reveal that during boreal winter air from midlatitudes originates primarily over the oceans, with 26% (±1.9%) last contacting the PBL over the eastern Pacific, 21% (±0.87%) over the Atlantic, and 16% (±1.2%) over the western Pacific. During summer, by comparison, midlatitude air originates primarily over land, overwhelmingly so over Asia [41% (±1.0%)] and, to a lesser extent, over North America [24% (±1.5%)]. Seasonal variations in the airmass fractions are interpreted in terms of changes in the large-scale ventilation of the midlatitude boundary layer and the midlatitude tropospheric jet.

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BibTeX Citation

  author={Orbe, C. and Newman, P. A. and Waugh, D. W. and Holzer, M. and Oman, L. D. and Li, F. and Polvani, L. M.},
  title={Airmass origin in the Arctic. Part I: Seasonality},
  journal={J. Climate},

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RIS Citation

ID  - or07100r
AU  - Orbe, C.
AU  - Newman, P. A.
AU  - Waugh, D. W.
AU  - Holzer, M.
AU  - Oman, L. D.
AU  - Li, F.
AU  - Polvani, L. M.
PY  - 2015
TI  - Airmass origin in the Arctic. Part I: Seasonality
JA  - J. Climate
VL  - 28
IS  - 12
SP  - 4997
EP  - 5014
DO  - 10.1175/JCLI-D-14-00720.1
ER  -

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