海洋学报（中文版）
海洋學報（中文版）
해양학보（중문판）
ACTA OCEANOLOGICA SINICA
2014年
1期
65-71
,共7页
宋雪珑%周生启%Ilker Fer
宋雪瓏%週生啟%Ilker Fer
송설롱%주생계%Ilker Fer
双扩散阶梯%北冰洋%热通量%分子热传导
雙擴散階梯%北冰洋%熱通量%分子熱傳導
쌍확산계제%북빙양%열통량%분자열전도
double-diffusive staircase%Arctic Ocean%heat flux%molecular heat conduction
北冰洋中，低温低盐的上层水与高温高盐的大西洋水之间，广泛存在着稳定的双扩散阶梯。基于锚定剖面仪、冰基剖面仪和微结构剖面仪的数据，对温盐廓线中的阶梯进行研究，分析阶梯的热通量。固定跟踪了锚定剖面仪的3个阶梯，研究阶梯参数随时间的变化。发现由经验公式得出的上下两界面的热通量差，与混合层内热量的变化有较好的相关性。利用微结构剖面仪数据，计算阶梯界面通过分子热传导输送的热通量。当选取最大位温梯度时，算出的传导热通量与经验公式算出的热通量接近。因此，实验室研究得到的热通量经验公式，可以用于计算北冰洋双扩散阶梯的热通量。
北冰洋中，低溫低鹽的上層水與高溫高鹽的大西洋水之間，廣汎存在著穩定的雙擴散階梯。基于錨定剖麵儀、冰基剖麵儀和微結構剖麵儀的數據，對溫鹽廓線中的階梯進行研究，分析階梯的熱通量。固定跟蹤瞭錨定剖麵儀的3箇階梯，研究階梯參數隨時間的變化。髮現由經驗公式得齣的上下兩界麵的熱通量差，與混閤層內熱量的變化有較好的相關性。利用微結構剖麵儀數據，計算階梯界麵通過分子熱傳導輸送的熱通量。噹選取最大位溫梯度時，算齣的傳導熱通量與經驗公式算齣的熱通量接近。因此，實驗室研究得到的熱通量經驗公式，可以用于計算北冰洋雙擴散階梯的熱通量。
북빙양중，저온저염적상층수여고온고염적대서양수지간，엄범존재착은정적쌍확산계제。기우묘정부면의、빙기부면의화미결구부면의적수거，대온염곽선중적계제진행연구，분석계제적열통량。고정근종료묘정부면의적3개계제，연구계제삼수수시간적변화。발현유경험공식득출적상하량계면적열통량차，여혼합층내열량적변화유교호적상관성。이용미결구부면의수거，계산계제계면통과분자열전도수송적열통량。당선취최대위온제도시，산출적전도열통량여경험공식산출적열통량접근。인차，실험실연구득도적열통량경험공식，가이용우계산북빙양쌍확산계제적열통량。
Double-diffusive staircases are located between the cold,fresh upper water and the warm,salty Atlantic Water in the Arctic Ocean.Based on the data of Moored Profiler,Ice-Tethered Profilers,and Microstructure Profi-ler,heat flux across the staircases were analyzed.Three staircases in Moored profiles were traced to study the tem-poral evolution of hydrographical properties of the staircases.Heat flux differences between the upper and lower interfaces were correlated with heat variance of the mixed layer.With the data of Microstructure Profiler,heat flux across the interface was estimated by the assumption of the molecular heat conduction being dominated.When the maximum potential temperature gradient was taken,the result was close to that based on the empirical formula of heat flux.Therefore,it was confirmed that empirical formula of heat flux obtained from the laboratory experiments can be applied in the diffusive convection of the Arcitc Ocean.
