Details
| Original language | English |
|---|---|
| Pages (from-to) | 277-290 |
| Number of pages | 14 |
| Journal | Dynamics of atmospheres and oceans |
| Volume | 10 |
| Issue number | 4 |
| Publication status | Published - Jan 1987 |
Abstract
Cold air outbreaks can be identified by the formation of cloud streets downwind from a land-sea boundary, as can be seen in numerous satellite pictures. These cloud streets are caused by horizontal roll vortices which in turn are due to dynamic and convective instability of the planetary boundary layer over sea. The development of these roll vortices is simulated with a numerical model and compared to observations obtained over the Bering Sea. Vertical heat transport is found to be due to turbulent diffusion in the initial stage of a cold air outbreak before organized roll vortices contribute to the heat flux in the higher levels of the boundary layer. The influence of a capping inversion on the dynamic and convective instability is also elucidated.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Oceanography
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Atmospheric Science
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In: Dynamics of atmospheres and oceans, Vol. 10, No. 4, 01.1987, p. 277-290.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Numerical simulation of vortex roll development during a cold air outbreak
AU - Etling, D.
AU - Raasch, S.
N1 - Funding Information: S. Raasch was supported by the Sonderforschungsbereich 212 of the Deutsche Forschungsgemeinschaft. Thanks is given to R. Lorenz for typing and drafting.
PY - 1987/1
Y1 - 1987/1
N2 - Cold air outbreaks can be identified by the formation of cloud streets downwind from a land-sea boundary, as can be seen in numerous satellite pictures. These cloud streets are caused by horizontal roll vortices which in turn are due to dynamic and convective instability of the planetary boundary layer over sea. The development of these roll vortices is simulated with a numerical model and compared to observations obtained over the Bering Sea. Vertical heat transport is found to be due to turbulent diffusion in the initial stage of a cold air outbreak before organized roll vortices contribute to the heat flux in the higher levels of the boundary layer. The influence of a capping inversion on the dynamic and convective instability is also elucidated.
AB - Cold air outbreaks can be identified by the formation of cloud streets downwind from a land-sea boundary, as can be seen in numerous satellite pictures. These cloud streets are caused by horizontal roll vortices which in turn are due to dynamic and convective instability of the planetary boundary layer over sea. The development of these roll vortices is simulated with a numerical model and compared to observations obtained over the Bering Sea. Vertical heat transport is found to be due to turbulent diffusion in the initial stage of a cold air outbreak before organized roll vortices contribute to the heat flux in the higher levels of the boundary layer. The influence of a capping inversion on the dynamic and convective instability is also elucidated.
UR - http://www.scopus.com/inward/record.url?scp=0023487030&partnerID=8YFLogxK
U2 - 10.1016/0377-0265(87)90021-2
DO - 10.1016/0377-0265(87)90021-2
M3 - Article
AN - SCOPUS:0023487030
VL - 10
SP - 277
EP - 290
JO - Dynamics of atmospheres and oceans
JF - Dynamics of atmospheres and oceans
SN - 0377-0265
IS - 4
ER -