| WANG Weibo,PAN Aijun,EDI Kusmanto,MUH Hasanudin,DENY Sutisna. 2018. North-south difference of water mass properties across the Lembeh Strait, North Sulawesi, Indonesia. Acta Oceanologica Sinica, 37(12):1－8 |
| North-south difference of water mass properties across the Lembeh Strait, North Sulawesi, Indonesia |
| 印尼北苏拉威西海蓝碧海峡水团性质的南北差异 |
| Received:June 15, 2017 |
| DOI：10.1007/s13131-018-1282-5 |
| Key words:water mass Lembeh Strait north-south difference |
| 中文关键词: 水团 蓝碧海峡 南北差异 |
| 基金项目:The National Key R&D Program of China under contract No. 2017YFC1405101; the Scientific Research Foundation of the Third Institute of Oceanography under contract No. 2016025; the China-Indonesia Maritime Cooperation Fund Project "China-Indonesia Bitung Ecological Station Establishment". |
| Author Name | Affiliation | E-mail | | WANG Weibo | Ocean Dynamic Laboratory, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | PAN Aijun | Ocean Dynamic Laboratory, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | aijunpan@tio.org.cn | | EDI Kusmanto | Research Center for Oceanography, Indonesian Institute of Sciences, Jakarta 14430, Indonesia | | | MUH Hasanudin | Research Center for Oceanography, Indonesian Institute of Sciences, Jakarta 14430, Indonesia | | | DENY Sutisna | Research Center for Oceanography, Indonesian Institute of Sciences, Jakarta 14430, Indonesia | |
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| Abstract: |
| Two field observations were conducted around the Lembeh Strait in September 2015 and 2016, respectively. Evidences indicate that seawater around the Lembeh Strait is consisted of North Pacific Tropical Water (NPTW), North Pacific Intermediate Water (NPIW), North Pacific Tropical Intermediate Water (NPTIW) and Antarctic Intermediate Water (AAIW). Around the Lembeh Strait, there exist some north-south differences in terms of water mass properties. NPTIW is only found in the southern Lembeh Strait. Water mass with the salinity of 34.6 is only detected at 200-240 m between NPTW and NPTIW in the southern Lembeh Strait, and results from the process of mixing between the saltier water transported from the South Pacific Ocean and the lighter water from the North Pacific Ocean and Sulawesi Sea. According to the analysis on mixing layer depth, it is indicated that there exists an onshore surface current in the northern Lembeh Strait and the surface current in the Lembeh Strait is southward. These dramatic differences of water masses demonstrate that the less water exchange has been occurred between the north and south of Lembeh Strait. In 2015, the positive wind stress curl covering the northern Lembeh Strait induces the shoaling of thermocline and deepening of NPIW, which show that the north-south difference of air-sea system is possible of inducing north-south differences of seawater properties. |
| 中文摘要: |
| 本文利用2015年9月和2016年9月两次现场观测数据，分析了蓝碧海峡水团性质的南北差异。研究发现，该海域水团包括北太平洋热带水（North Pacific Tropical Water，NPTW）、北太平洋中层水（North Pacific Intermediate Water，NPIW）、北太平洋热带中层水（North Pacific Tropical Intermediate Water，NPTIW）和南极中层水（Antarctic Intermediate Water，AAIW）。蓝碧海峡水团特征存在显著的南北差异：NPTIW只存在于蓝碧海峡南部；在NPTW与NPTIW间海峡南部存在盐度为34.6的水团，水深范围为200-240m，是南太平洋高盐水与北苏拉威西海和北太平洋低盐水混合的结果。蓝碧海峡北部海域存在显著的向岸流。海峡内水体向南流。蓝碧海峡南北部水团性质的显著差异证实蓝碧海峡南北部水体交换不明显。 |
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