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A numerical approach for understanding the temporal and spatial correlation scales of sound velocity in long term: a case study for the source and surrounding region of the Kuroshio Current

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Title A numerical approach for understanding the temporal and spatial correlation scales of sound velocity in long term: a case study for the source and surrounding region of the Kuroshio Current
 
Creator Da, Lianglong
Guo, Wuhong
Li, Weihua
 
Subject Sound velocity profile
Auto-correlation index
Correlation scale
Kuroshio source region
 
Description 261-268
To accurately understand the temporal and spatial distributions of sound velocity fields and their relevant characteristics, numerically investigated the sound velocity auto-correlation index at the source and adjacent region of the Kuroshio Current using 1911-2001 observation data. Auto-correlation index was fitted using a Gaussian function for the temporal and spatial scales of the investigated regions. The correlation scales in time and spatial domain in spring, summer, fall, and winter were 14.2/145.3, 14.2/135.9, 13.5/133.8, and 13.7/143.3 days/km, respectively. These scales are applied to the reconstructed sound velocity model in terms of empirical orthogonal functions. The error of the sound velocity constructed was minimal (3 m/s) compared with those constructed using other methods (up to 4.3 m/s). This method improves the precision of the sound velocity reconstruction compared with that based on monthly data. The use of temporal and spatial scales enhances the accuracy of sound velocity reconstruction.
 
Date 2016-07-22T07:39:09Z
2016-07-22T07:39:09Z
2016-02
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/35047
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.45(02) [February 2016]