Retrieval of static stability parameter from the radiosonde/rawinsonde ascent rate profiles: a wavelet approach

摘要

In the present communication a novel method is presented to derive thealtitude profile of Brunt-Väisälä period from the ascent rateprofile of sounding balloons. The basic premise of the present method isthat the oscillations in the ascent rate of the balloon will have thesignature of Brunt-Väisälä frequency, which can be retrieved byusing sophisticated spectral tools. We employ wavelet transforms to arriveat the Brunt-Väisälä period profile. Comparison of retrievedBrunt-Väisälä periods with the values derived from thetemperature data available from the same radiosonde ascent shows goodagreement. Retrieving the atmospheric temperature from the height profile ofBrunt-Väisälä period is also discussed in the presentcommunication. We have shown that it is possible to estimate theBrunt-Väisälä period and temperature profiles from therawinsonde ascent rate data alone where temperature sounding is notavailable.