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Geostrophic Wind, Gradient Wind, Thermal Wind And The Vertical Wind Profile – A Sample Analysis Within A Planetary Boundary Layer Over Arctic Sea-Ice

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Abstract

For the interpretation of many boundary-layer field experiments the geostrophic wind is needed as an external parameter. However, quite often and especially in remote areas this wind is not known at all or difficult to determine because there are not enough measurements of the surface pressure.

Here it is shown how measurements carried out with the HELIPOD system, a helicopter-borne meteorological turbulence measuring system, may be used to evaluate the geostrophic wind. This is done by the analysis of the pressure field at different heights. An additional analysis of the temperature field in the same heights allows for the discussion of the quality of the derived geostrophic wind. An intercomparison with the vertical wind profile enables us to discuss the influence of the curvature of the isobars. From this, finally, also the gradient wind can be estimated.

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Authors and Affiliations

  1. Institute for Meteorology and Climatology, University of Hannover, Germany

    R. Roth, M. Hofmann & C. Wode

Authors
  1. R. Roth
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  2. M. Hofmann
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  3. C. Wode
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Roth, R., Hofmann, M. & Wode, C. Geostrophic Wind, Gradient Wind, Thermal Wind And The Vertical Wind Profile – A Sample Analysis Within A Planetary Boundary Layer Over Arctic Sea-Ice. Boundary-Layer Meteorology 92, 327–339 (1999). https://doi.org/10.1023/A:1001850123085

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  • DOI: https://doi.org/10.1023/A:1001850123085

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