Oscillating nocturnal slope flow in a coastal valley

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Gryning, Sven-Erik ; Mahrt, L. ; Larsen, Søren (2011)

Observations of slope flows in a coastal valley are analyzed. The diurnal variation of upslope and downslope flows depends on season in a systematic way which appears to be related to the high latitude of the observational site and the presence of a nearby layer of marine air. Summer nocturnal flow over the sloping valley floor was studied during a special observing campaign. A downslope gravity flow interacts with even colder surface air at the valley floor. The latter originates as cold marine air or previous drainage of cold air. Regular oscillations, which appear to be trapped, terrain-related, internal gravity waves, exert a major influence on the downslope flow and its interaction with pre-existing cold air at the floor of the valley.DOI: 10.1111/j.1600-0870.1985.tb00281.x
  • References (13)
    13 references, page 1 of 2

    Banta, R. 1984. Daytime boundary-layer evolution over mountainous terrain (I). Observations of the dry circulations. Mon. Wea. Rev. 112. 34C356.

    DHI, 1979. Hydrografiske unders0gelser Narssaq 1979. (Hydrographical investigations Narssaq 1979). In Danish. Dansk Hydraulisk Institut. Hersholm. Denmark. Work carried out for The Greenland Technical Organization, Copenhagen, Denmark.

    Geiger, R. 1975. The climate near the ground. Harvard University Press, 6 11 pp.

    Gryning, S. E. 1981. Elecated source SF,-tracer dispersion experiments in the Copenhagen area. RiseR-446. Rise National Laboratory, DK-4000 Roskilde, Denmark, 187 pp.

    Gryning, S. E. and Thomson. D. W. 1979. A tall-tower instrument system for mean and fluctuating velocity. fluctuating temperature and sensible heat flux measurements. J . Appl. Meteorol. 18, 1674-1 678.

    Gryning, S. E. and Lyck, E. 1983.A tracer inrestigation of the atmospheric dispersion in the Dyrnces calley, Greenland. Rise-R-48I . Rise National Laboratory. DK-4000 Roskilde. Denmark, 67 pp.

    Haltiner. G. J . 197 I . Numerical weather prediction. New York, J. Wiley and Sons Inc. 3 1 7 pp.

    Heywood, G. S. P. 1933. Katabatic winds in a valley. Q . J . R . Meteoroi. Soc. 59.4 7-5 8.

    Kristensen, L. 1983.Meteorological measurements at the KcaneJeld in the period September 1979-March 1983. Work carried out for the Uranium Project. Rise National Laboratory. DK-4000 Roskilde. Denmark.

    Perkin. R. G. and Lewis. E. L. 1978. Mixing in an arctic fjord. J . Phjls. Oceanogr. 8.873-880.

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