| 摘要: |
| 据历史天气图和GEOSAT（美国测地／地球物理卫星）高度计同步测到的一个温带气旋为个例，以卫星的海面轨迹为断面，分析该温带气旋横断剖面上的海浪高与风速的结构特征。认为相对于风速，温带气旋的内围波高与外围波高具有明显的不对称性，内围波高明显大于外围波高，波高与风速的关系表现为一种中空反旋结构。给出了这种结构的数学模型、参数估计方法和估计值。 |
| 关键词: 卫星遥感 卫星高度计 温带气旋 海浪 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，49376255号;国家自然科学重点基金资助，49336300号;青岛海洋大学科研基金资助 |
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| STUDY ON THE SECTION STRUCTURE OF WAVES IN THE TEMPERATE DEPRESSION WITH GEOSAT ALTIMETER DATA |
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Guo Peifang1, Wang Hua2, Shi Ping3
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1.Department of Physical Oceanology and Marine Meteorolgy, OceanUniversity of Qingdao, Qingdao 266003;2.The National Marine Information Service, Tianjin 300171;3.South China Sea Institute of Oceanology, Guangzhou 510301
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| Abstract: |
| This paper reports results of study of an April 11 zero o'clock, 1989 GEOSAT record of a TDCW (Temperate Depression Cyclone Wave) (16th of 52 repeat cycles) and a weather report of the same time and place. The cyclone center was at 159°E, 53°N, the center atmospheric pressure was 992 hPa, the maxinum wind speed was 13.7 m/s, the maxinum significant wave height (SWH) was 3.8 m, and the radius of maxinum wind speeds was about 1200 km.
Analysis on the structural characteristics of the SWHs and the wind speeds in the track revealed differences between the heights of the internal and external SWHs about the large wind speeds center. The internal SWHs were larger than those of the external SWHs at same wind speeds, the maxinum difference was about 1.0 m. The relation between the SWHs and the wind speeds expressed a hollow core structure turning counterclockwise inward in the following mathematical pattern
SWH = a + bU±(cU)nsin(π U/Umax)
where a = 0.30; b= 0.24; c = 0.1; n = 3; U is the wind speeds; Umax is the maximum wind speed; a + bU express the average _state of the structure; (cU)nsin(π U/Umax) express the structral non-symmetry; “+” applies to the internal whorl of the cyclone; “-" appplied to the external whorl. |
| Key words: Satellite remote sensing, Satellite altimeter, Temperate depression, Ocean wave |
