Journal of Tropical Oceanography >
Optimal interpolation assimilation experiments based on Envisat ASAR ocean wave spectral data
Received date: 2010-01-06
Revised date: 2010-03-23
Online published: 2011-10-10
Supported by
海洋公益性行业科研专项(200705027)
With the third generation wave model named LAGFD-WAM, optimal interpolation assimilation experiments are performed based on Envisat Advanced Synthetic Aperture Radar (ASAR) ocean wave spectral data using four different iso-tropic background error correlation functions. The experiment results are compared with observation data from four different moored buoys. The results show that the optimal interpolation of ASAR wave spectral data can effectively improve the sig-nificant wave height (SWH) simulation of the wave model. The differences of assimilation effects among four experiments with different background error correlation functions are not obvious. The key to assimilation effects lies in the choice of cor-relation scale length. For the auto-regressive background error correlation function, the experiment results indicate that the assimilation effect is best when the correlation scale length is assumed to be from 400 to 500km, and that the root-mean-square error of model SWH data relatively decreases by 26% compared with that without assimilation.
. Institute of Oceanology,CAS,Qingdao 6607,China; . Graduate University o . Optimal interpolation assimilation experiments based on Envisat ASAR ocean wave spectral data[J]. Journal of Tropical Oceanography, 2010 , 29(5) : 17 -23 . DOI: 10.11978/j.issn.1009-5470.2010.05.017
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