| 摘要: |
| 根据中国近海高分辨率( 1/6?) 环流模式的模拟结果, 计算了南沙邻近海域与外海之间的海水体积、热量和盐量输运及其对印度尼西亚贯穿流的贡献。研究海域为0?—14?N 的整个南海南部海域。计算得出, 穿过研究海域流向印度尼西亚海域, 最终流向印度洋的年平均体积、热量和盐量输运分别为5.2Sv( 1Sv= 1 × 106m3?s-1 ) 、0.57PW 和184Gg?s-1 , 大约占印度尼西亚贯穿流相应输运量的1/4。这一结果表明南海是全球大传送带这一全球海洋最主要热盐环流系统的重要通道之一。从南海流向印度尼西亚海域的通道以卡里马塔海峡为最主要, 以下依次为巴拉巴克海峡、民都洛海峡和马六甲海峡。大的南向通量主要发生在冬、秋季, 春末夏初总的通量向北。计算还得出输入本海区的热输运量比输出少0.064PW, 由这一结果推得, 通过海-气界面由大气进入海洋的年平均净热通量约为30W?m-2。 |
| 关键词: 南海南部, 体积输运, 热输运, 盐输运, 印度尼西亚贯穿流 |
| DOI： |
| 分类号: |
| 基金项目:国家重点科技专项, 97-926-05-01 号; 国家重点基础发展规划项目, G1999043808 号; 国家自然科学基金资助项目, 49876010 号; 中国科学院知识创新工程项目,KZCX2-202A 号 |
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| VOLUME, HEAT AND SALT TRANSPORTS BETWEEN THE SOUTHERN SOUTH CHINA SEA AND ITS ADJACENT WATERS, AND THEIR CONTRIBUTION TO THE INDONESIAN THROUGHFLOW |
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FANG Guo-Hong1, WEI Ze-Xun1, HUANG Qi-Zhou2, FANG Wen-Dong2
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1.Institute of Oceanology, The Chinese Academy of Sciences;2.Institute of Oceanology of the South China Sea, The Chinese Academy of Sciences
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| Abstract: |
| The water volume, heat and salt transports between the Southern South China Sea and its adjacent waters are estimated from the simulated results of a high-resolution ( 1/6?) numerical circulation model of the Pacific-Asian marginal seas. The contribution of these transports to the Indonesian Throughflow is also evaluated. The study area covers the entire Southern South China Sea from 0? to 14?N. The calculation shows that the mean volume, heat and salt transports through the study area are 5.2Sv(1Sv= 1 × 106m3?s-1) , 0.57PW( 1PW= 1 × 1015W) and 184 Gg?s-1, respectively, with the flow being directed toward the Indonesian waters and eventually entering the Indian Ocean. These transports account for around 1/4 of the corresponding transports of the Indonesian Throughflow. The results indicate that the South China Sea is an important passage of the Great Ocean Conveyor, the most important global thermohaline circulation belt. Among the passway for water to flow from the South China Sea to the Indonesian area the Karimata Strait is the most important, followed by subsequently the Balabac, Mindoro and Malacca Straits. More intense southward transports mainly occur in winter and autumn, while in later spring and summer the total transports are towards the north. As revealed by the calculation of heat balance, the heat entering the study area is less than that leaving the study area by an amount of 0.064PW, implying that the mean net heat flux through the sea surface is about 30 W?m-2, from the atmosphere to the ocean. |
| Key words: Southern South China Sea, Volume transport, Heat transport, Salt transport, Indonesian Throughflow |
