Change of Multifractal Thermal Characteristics in the Western Philippine Sea Upper Layer during Internal Wave-Soliton Propagation
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Authors
Chu, Peter C.
Hsieh, Chung-Ping
Subjects
High-order structure function
intermittency
internal wave
internal soliton
multifractal analysis
power spectrum
stationarity
singular measure
intermittency
internal wave
internal soliton
multifractal analysis
power spectrum
stationarity
singular measure
Advisors
Date of Issue
2007
Date
2007
Publisher
Language
Abstract
The upper layer (above 140 m depth) temperature in the western Philippine Sea near
Taiwan was sampled using a coastal monitoring buoy (CMB) with 15 attached
thermistors during July 28–August 7, 2005. The data were collected every 10 min at
1, 3, 5, 10, 15, and 20 m using the CMB sensors, and every 15 sec at 15 different
depths between 25 m and 140 m. Internal waves and solitons were identified from the
time-depth plot of the temperature field. Without the internal waves and solitons, the
power spectra, structure functions, and singular measures (representing the intermittency)
of temperature field satisfy the power law with multi-scale characteristics
at all depths. The internal waves do not change the basic characteristics of the
multifractal structure. However, the internal solitons change the power exponent of
the power spectra drastically, especially in the low wave number domain; they also
break down the power law of the structure function and increase the intermittency
parameter. The physical mechanisms causing these different effects need to be explored
further.
Type
Article
Description
Journal of Oceanography, Oceanographic Society of Japan, 63, 927-939.
Series/Report No
Department
Oceanography
Organization
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NPS Report Number
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Citation
Chu, P.C. and C. P. Hsieh, 2007: Change of Multifractal Thermal Characteristics in the Western Philippine Sea Upper Layer during Internal Wave-Soliton Propagation (paper download). Journal of Oceanography, Oceanographic Society of Japan, 63, 927-939.
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Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.