Evidence of a Convective Boundary Layer Developingon the Antarctic Plateau during the Summer |
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| Authors: | G Mastrantonio V Malvestuto S Argentini T Georgiadis A Viola |
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| Institution: | (1) Istituto di Fisica dell’Atmosfera, CNR, Rome, Italy, IT;(2) ISAO/CNR, Bologna, Italy, IT |
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| Abstract: | Summary The development of a convective boundary layer over the Antarctic Plateau is documented by a Doppler minisodar data-set recorded
during a 10 day campaign in January 1997. The vertical velocities associated with thermals do not exceed 1 m/s, while the
depth of the convective layer, usually less than 200 m, never surpasses 300 m. Measurements of momentum flux, sensible heat
flux, wind speed and radiation budget show characteristics that are typical of a convective boundary layer evolution. The
diurnal behaviour of absolute humidity, however, exhibits features that are not expected, e.g. anticorrelation with incoming
net radiation and air temperature.
Received October 30, 1998 Revised May 26, 1999 |
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