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關(guān)于黑潮延伸體海域水體的三維熱結(jié)構(gòu)時(shí)-空變化特征研究

單位：1. 中國(guó)科學(xué)院海洋研究所, 山東青島 266071;
2. 中國(guó)科學(xué)院大學(xué), 北京 100049;
3. 青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室海洋動(dòng)力過(guò)程與氣候功能實(shí)驗(yàn)室, 山東青島 266237;
4. 國(guó)家衛(wèi)星海洋應(yīng)用中心, 北京 100081

關(guān)鍵詞：黑潮延伸體三維熱結(jié)構(gòu) 時(shí)-空變化

分類號(hào)：P731.27

出版年·卷·期（頁(yè)碼）：2021·38·第一期（67-77）

摘要：

基于西北太平洋Argo數(shù)據(jù)資料，利用參數(shù)化方法，從Argo溫鹽剖面數(shù)據(jù)中提取出一系列特征動(dòng)力參數(shù)，定量分析黑潮延伸體海域水體的三維熱結(jié)構(gòu)的時(shí)-空變化特征、季節(jié)變化特征及其與地形和環(huán)流的關(guān)系。結(jié)果表明：黑潮延伸體海域水體的海表面溫度存在著明顯的冬春弱，夏秋強(qiáng)的季節(jié)變化特征，冬季平均海表面溫度為15℃，夏季則達(dá)到了27℃；混合層深度在春季和夏季都較深，在180 m左右，秋冬較淺，在17 m左右，在水平方向上混合層深度有較強(qiáng)的梯度；溫躍層春、夏、秋、冬4季的平均溫度表現(xiàn)出明顯的南北差異，夏季南部海域平均溫度為14℃左右，北部海域較低為5℃左右；季節(jié)性溫躍層深度大約在100 m左右；黑潮延伸體海域水體的溫躍層底部最大深度在800 m左右；黑潮延伸體主體海域中心位置冬天在36°N左右，夏天大約移到34°N。

Based on the Argo data in the Northwestern Pacific, a series of characteristic dynamic parameters were extracted from the Argo temperature-salt profile data using parameterized methods, and used for quantitative analysis of the Kuroshio extension sea water body three dimensional thermal structure of the space-time variation characteristics. This paper studied the area of three dimensional thermal structure of seasonal variation characteristics and its relationship with topography and the circulation. The results showed that the sea surface temperature of the Kuroshio extension body was characterized by seasonal variations of winter, spring, summer and autumn. The average sea surface temperature was 15℃ in winter and 27℃ in summer. The depth of the mixing layer is deep in spring and summer, about 180 m; in autumn and winter, it is shallow, about 17 m; in the horizontal direction, there is a strong gradient in the depth of the mixing layer. The average temperature scale of the thermocline in spring, summer, autumn and winter shows a significant difference between the north and the south. In summer, the average temperature of the southern sea area is about 14℃, while that of the northern sea area is relatively low at about 5℃. The depth of seasonal thermocline is about 100 m, and the maximum depth of the thermocline bottom is about 800 m in the Kuroshio extension area. The central location of the main body of the Kuroshio extension body is about 36°N in winter and about 34°N in summer.

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