Sodar studies of gravity waves in the planetary boundary layer at Delhi

Authors

  • S. K. AGGARWAL National Physical Laboratory, New Delhi
  • S. P. SINGAL National Physical Laboratory, New Delhi
  • S. K. SRIVASTAVA India Meteorological Department, New Delhi, India

DOI:

https://doi.org/10.54302/mausam.v31i3.3536

Abstract

Analysis of sodar echograms for a period of one year (May 19777-April 1978) shows that wavemotions, both simple and complex, occur in the planetary boundary layer at Delhi. The oscillations occur in the boundary layer under conditions of nocturnal radiation inversion, ascending inversion and frontal wind shear.

Auto correlation and power spectral density techniques of wave analysis have been applied to the observed wave motions to study their periodicity. The frequency spectra of the observed waves are reported. The time periods lying mostly within 1-15 Minutes suggest them to be atmospheric gravity waves originating due to the stable restoring force of the density gradients. Wave lengths and scale sizes of the observed waves have been calculated. The scale size of the waves has been found to be small.

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Published

01-07-1980

How to Cite

[1]
S. K. AGGARWAL, S. P. SINGAL, and S. K. SRIVASTAVA, “Sodar studies of gravity waves in the planetary boundary layer at Delhi”, MAUSAM, vol. 31, no. 3, pp. 373–384, Jul. 1980.

Issue

Vol. 31 No. 3 (1980): MAUSAM

Section

Research Papers

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