Seasonal variability of thermocline

Seasonal variability of thermocline in the Yellow Sea

Based on the MASNUM wave-tide-circulation coupled numerical model, seasonal variability of thermocline in the Yellow Sea was simulated and compared with in-situ observations. Both simulated mixed layer depth (MLD) and thermocline intensity have similar spatial patterns to the observations. The simulated maximum MLD are 8 m and 22 m, while the corresponding observed values are 13 m and 27 m in July and October, respectively. The simulated thermocline intensity are 1.2℃/m and 0.5℃/m in July and October,respectively, which are 0.6℃/m less than those of the observations. It may be the main reason why the simulated thermocline is weaker than the observations that the model vertical resolution is less precise than that of the CTD data which is 1 m. Contours of both simulated and observed thermocline intensity present a circle in general. The wave-induced mixing plays a key role in the formation of the upper mixed layer in spring and summer. Tidal mixing enhances the thermocline intensity. Buoyancy-driven mixing destroys the thermocline in autumn and keeps the vertical temperature uniform in winter.

作 者： 喬方利 夏長水 施建偉 馬建 葛人峰 袁業立   作者單位： 喬方利,夏長水,馬建,葛人峰,袁業立(The First Institute of Oceanography, State Oceanic Administration (SOA), Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling (MASNUM), SOA, Qingdao 266061, China)

施建偉(Guest Researcher of MASNUM, SOA, China) 

刊 名： 中國海洋湖沼學報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY  年，卷(期)： 2004 22(3)  分類號：   關鍵詞： thermocline   the Yellow Sea   wave-tide-circulation coupled model   wave-induced mixing   tidal mixing  

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