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Sodar observations of the antarctic boundary layer in a deglaciated area: Preliminary results

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Il Nuovo Cimento C

Summary

A single-axis sodar system, with off-line Doppler analysis, has been operated in the month of January 1987 at the Italian Antarctic base near Terra Nova Bay. The instrument was installed in complex terrain at a distance of approximately 1 km from the shore-line. During the campaign the area around the station, for a width of about (2÷3) km from the shore, was completely deglaciated and exposed to periods of direct solar irradiation. The measurements were carried out almost continuously with the antenna pointing to the zenith or at zenith angles of 20° and 30° in the NE direction. From a preliminary analysis of the data, the main phenomena observed were as follows:a) Very intense convection during periods of insolation with vertical velocities up to 4 ms−1.b) Evidence of layering and Kelvin-Helmholtz instabilities.c) Strong subsidence.

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Abbreviations

PACS 92.60.Fm:

Boundary layer structure and processes

PACS 93.30. Sq:

Polar regions

PACS 43.28.Vd:

Measurement methods and instrumentation to determine winds wind shears, turbulence parameters, temperatures, and pollutants in air

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Authors and Affiliations

  1. IFA/CNR, Via G. Galilei, 00044, Frascati (Roma)

    G. Mastrantonio

  2. Pas/ENEA, Via Anguillarese 301, 00060, S. M. di Galeria (Roma)

    R. Ocone & A. Pellegrini

  3. Dipartimento di Fisica, Università «La Sapienza», 00185, Roma

    G. Fiocco

Authors
  1. G. Mastrantonio
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  2. R. Ocone
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  3. A. Pellegrini
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  4. G. Fiocco
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Mastrantonio, G., Ocone, R., Pellegrini, A. et al. Sodar observations of the antarctic boundary layer in a deglaciated area: Preliminary results. Il Nuovo Cimento C 13, 589–597 (1990). https://doi.org/10.1007/BF02507623

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  • DOI: https://doi.org/10.1007/BF02507623

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