A Study of the Fluctuations of the Wind Field Over the Tropical Indian Ocean.

摘要

Using radiosonde data from six widely scattered stations in the Indian Ocean, an attempt was made to identify quasi-periodic wind oscillations during the 1973-1974 winter monsoon season. The data were analyzed using spectrum analysis and time cross-section analysis techniques. In general, the results of the power spectra computed show a seven-day peak which seems most significant. A four-five day peak and a thirteen-day peak were also found at some stations. The cross-spectrum analysis shows little correlation of the peaks, indicating uncertainty in the significance of the spectral results.