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Vertical structure and characteristics of 23-60 day (zonal) oscillations over the tropical latitudes during the winter months of 1986 - Results of equatorial wave campaign-IIResults are presented of the equatorial wave campaign-II, a meteorological rocket study which was part of the Indian Middle Atmosphere Program. The equatorial wave campaign-II was conducted from Shar, India (13.7 deg N, 80.2 deg E) from January 15-February 28, 1986. By means of high altitude balloon and the RH-200 meteorological rocket, winds were measured from ground level up to 60 km altitude once each day during the 45-day period. The oscillation frequencies of the deviations in the east-west component of the winds from their mean at each 1-km height interval are obtained by the maximum entropy method. The phases and amplitudes of these frequencies are determined by use of the least squares method on the wind variation time series. Enhanced wave activity is shown to take place in the troposphere and lower mesosphere. The tropospheric waves observed suggest themselves to be Rossby waves of extratropical origin penetrating to tropical latitudes. The observed stratospheric/mesospheric waves appear to emanate from a source around the stratopause.
Document ID
19910034074
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Raghavarao, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Suhasini, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sridharan, R.
(Physical Research Laboratory Ahmedabad, India)
Krishnamurthy, B. V.
(ISRO, Vikram Sarabhai Space Centre Trivandrum, India)
Nagpal, O. P.
(Delhi, University India)
Date Acquired
August 15, 2013
Publication Date
September 1, 1990
Publication Information
Volume: 99
ISSN: 0253-4126
Subject Category
Meteorology And Climatology
Accession Number
91A18697
Distribution Limits
Public
Copyright
Other

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