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Simulating the moderating effect of a lake on downwind temperatures

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Abstract

A steady-state, two-dimensional numerical model is used to simulate air temperatures and humidity downwind of a lake at night. Thermal effects of the lake were modelled for the case of moderate and low surface winds under the cold-air advective conditions that occur following the passage of a cold front. Surface temperatures were found to be in good agreement with observations. A comparison of model results with thermal imagery indicated the model successfully predicts the downwind distance for which thermal effects due to the lake are significant.

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Abbreviations

f :

Coriolis parameter

g :

Acceleration of gravity

K :

Turbulent eddy coefficient

M :

Moisture availability parameter

Q rad :

Net long-wave absorbed radiation

q :

Specific humidity

t :

Time

Ug :

Geostrophic wind

u,v,w :

Horizontal, crosswind, and vertical velocity components

x,y,z :

Horizontal and vertical coordinates

ζ :

Vorticity

θ :

Potential temperature

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Author notes

  1. R. G. Bill Jr.

    Present address: Lawrence Berkeley Laboratory, University of California, Berkeley, California

Authors and Affiliations

  1. Office of Water Resources and Department of Fruit Crops, Univeristy of Florida, Gainesville, Florida, USA

    R. G. Bill Jr., E. Chen, R. A. Sutherland & J. F. Bartholic

Authors
  1. R. G. Bill Jr.
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  2. E. Chen
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  3. R. A. Sutherland
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  4. J. F. Bartholic
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Bill, R.G., Chen, E., Sutherland, R.A. et al. Simulating the moderating effect of a lake on downwind temperatures. Boundary-Layer Meteorol 16, 23–33 (1979). https://doi.org/10.1007/BF02220404

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  • DOI: https://doi.org/10.1007/BF02220404

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