Time series analysis of diurnal cycles in small-scale turbulence
✍ Scribed by N. H. Chan; J. B. Kadane; T. Jiang
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 169 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1180-4009
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✦ Synopsis
Two new time series techniques are employed to study the diurnal eect at between 30 and 60 metres depth in the upper equatorial ocean. A modi®ed spectral approach is proposed to identify the period of an unequally spaced series. Based on the exceedances of mixing activities, a new criterion is introduced to identify local nights and days. These two techniques together provide a simple way to demonstrate the existence of the diurnal cycle in deep strati®ed layers in the ocean. Instead of entertaining complicated models, the proposed approach suggests a simple way to identify the periodicity of an unequally spaced data set of this nature. Similar diurnal eects are detected in the analyses of a subsequent data set.