Numerical study of the diurnal variation of the Adelie Land
katabatic wind regime

T. Parish1, P. Pettre2, and G. Wendler3

(1) Department of Atmospheric Science, University of Wyoming, Laramie WY
(2) Meteo-France, Centre National de Recherches Meteorologiques, Toulouse, France
(3) Geophysical Institute, University of Alaska Fairbanks, Fairbanks AK


Numerical simulations of the katabatic wind regime have been conducted for the variety of solar forcing and synoptic conditions assuming a clear sky environment. Results suggest that the katabatic wind is a robust feature of the Antarctic boundary layer. Significant disruption of the low-level drainage features occurs only during the midsummer months owing to the solar heating of the ice slopes and from synoptic activity along the Adelie Land coastline. The numerical simulations depict a rapid summer to winter transition of katabatic wind conditions over the 1 month period from mid-February to mid-March.

Financial support was obtained from the Alaska Climate Research Center, State of Alaska, and from NSF Grant DPP9070969 and Grant No. 9413879.
1993, Journal of Geophysical Research, Vol 98(D7), 12933-12947