Abstract
Abstract A study of the potential vorticity budget for the low-level flows over the Arabian Sea and Indian Ocean is presented here. This study covers a 17-day period between 11 and 27 June 1979 during the GARP Monsoon Experiment (MONEX). Data sets for this study include the special observing systems for the Global Experiment, i.e., cloud winds from the geostationary satellites, surface and upper air data from the First GARP Global Experiment, FGGE and MONEX, data from low-level constant-level balloons, upper air data from dropwindsonde aircraft, and the World Weather Watch. The selection of the 17-day period is important logically for both phenomena and from the availability of the maximum data sets, over oceans during the global experiment. As many as 50 soundings per day were available from this observing system. The framework for the calculations are three equations that describe the changes in potential vorticity, absolute vorticity and the dry static stability. These equations include as relevant for...
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