Winds and Waves in the Yellow and East China Seas: A Comparison of Spaceborne Altimeter Measurements and Model Results |
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| Authors: | Paul A Hwang Steven M Bratos William J Teague David W Wang Gregg A Jacobs Donald T Resio |
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| Institution: | (1) Oceanography Division, Naval Research Laboratory, Stennis Space Center, MS, 39529-5004, U.S.A;(2) U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS, 39180-6199, U.S.A;(3) Stennis Space Center, Computer Science Corporation, MS, 39529-5004, U.S.A |
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| Abstract: | Wind speed and wave height measured by satellite altimeters represent a good data source to the study of global and regional
wind and wave conditions. In this paper, the TOPEX altimeter wind and wave measurements in the Yellow and East China Seas
are analyzed. The results provide a glimpse on the statistical properties and the spatial distributions of the regional wind
and wave conditions. These data are excellent for use in the validation and verification of numerical simulations on global
and regional scales. The altimeter measurements are compared with model output of temporal statistics and spatial distributions.
The results show that the model simulations are in good agreement with TOPEX measurements in terms of the local mean and standard
deviation of the variables (wave height and wind speed). For the comparison of spatial distributions, the quality of agreement
between numerical simulations and altimeter measurements varies significantly from cycle to cycle of altimeter passes. In
many cases, trends in the spatial distributions of wave heights and wind speeds between simulations and measurements are opposite.
The statistics of biases, rms differences, linear regression coefficients and correlation coefficients are presented. A rather
large percentage (∼50%) of cases show poor agreement based on a combination of low correlation, large rms difference or bias,
and poor regression coefficient. There are indications that wave age is a factor affecting the performance of wave modeling
skills. Generally speaking, the error statistics in the wave field is correlated to the corresponding error statistics in
the wind field under the condition of active wind-wave generation. The error statistics between the wave field and the wind
field become less correlated for large wave ages.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | Wind wave wave age climatology spaceborne altimeter East China Sea Yellow Sea Kuroshio model comparison |
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