Mean seasonal cycle of isothermal depth in the South China Sea
Mean seasonal cycle of isothermal depth in the South China Sea
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DOI：
10.1029/2006jc003583
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发表时间：
2007-02
影响因子：
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通讯作者：
T. Qu;Yan Du;J. Gan;Dongxiao Wang
中科院分区：
文献类型：
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作者：
T. Qu;Yan Du;J. Gan;Dongxiao Wang
[1]利用南海现有的温度剖面资料，研究了等温深度的平均季节变化。年平均等温深度有两个深核（> 45 m）。一条是从吕宋海峡沿沿着中国南部大陆坡向西延伸，另一条是在南海南部深海盆。调和分析表明，南海北方海域等温深度的季节变化以年变化为主，冬季在70 m以上，夏季在中国南部陆坡附近低于20 m。南海南部的年变化较弱，秋季等温深度接近季节最大值（> 55 m），春季接近季节最小值（< 35 m）。南海南部的半年变化最为显著，其强度与年变化相当。其中，本地Ekman抽水似乎是一个重要的过程，负责在南海南部的半年变化。详细描述了南海混合层的逐月变化，为进一步了解南海混合层动力学和热力学提供了基本背景。
[1] The mean seasonal cycle of isothermal depth is examined using all available temperature profiles in the South China Sea. On the annual average, the isothermal depth has two deep cores (> 45 m). One extends westward from the Luzon Strait along the continental slope south of China, and the other in the deep basin of the southern South China Sea. Harmonic analysis shows that the seasonal variation of isothermal depth is predominantly annual in the northern South China Sea, exceeding 70 m in winter and falling below 20 m in summer near the continental slope south of China. The annual variation is weaker in the southern South China Sea, where the isothermal depth approaches its seasonal maximum (> 55 m) in fall and minimum (< 35 m) in spring. The semiannual variation is most prominent in the southern South China Sea, being of comparable strength with the annual variation. Among others, local Ekman pumping appears to be an important process responsible for the semiannual variation in the southern South China Sea. A detailed description of the month-to-month variations is provided, to set a basic background for further understanding the South China Sea mixed layer dynamics and thermodynamics.