1. Department of Earth and Atmospheric Sciences, Purdue University , West Lafayette IN 47907, >USA
2. Department of Atmospheric Sciences, National Central University , Chung-Li Tao-yuan 320 Taiwan
3. Department of Physical Oceanography, Woods Hole Oceanographic Institute , Woods Hole MA 02543-1050 USA
4. Hydrospheric Atmospheric Research Center (HyARC), Nagoya University , Nagoya 464-8601 Japan