基金Supported by the National Basic Research Program of China （973 Program, No. 2007CB416605）, by the Office of Naval Research （ONR） （No. N00014-03-0337）, the National Aeronautics and Space Administration （No. NAG5-11773）, and the National Oceanic and Atmospheric Administration （No. NA 17EC2449）.
ACKNOWLEDGMENTS The authors wish to thank Dr. Victor V. Klemas, Mr. Salmon Doug, and Mr. Mardin Allan for their help in improving the manuscript.