Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation | |
Xie Lingling1; Tian Jiwei1; Hu Dunxin2; Wang Fan2 | |
2009-11-01 | |
发表期刊 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY |
ISSN | 0254-4059 |
卷号 | 27期号:4页码:955-965 |
文章类型 | Article |
摘要 | Using the data of conductivity-temperature-depth (CTD) intensive observations conducted during Oct.-Nov. 2005, this study provides the first three-dimension quasi-synoptic description of the circulation in the western North Pacific. Several novel phenomena are revealed, especially in the deep ocean where earlier observations were very sparse. During the observations, the North Equatorial Current (NEC) splits at about 12A degrees N near the sea surface. This bifurcation shifts northward with depth, reaching about 20A degrees N at 1 000 m, and then remains nearly unchanged to as deep as 2 000 m. The Luzon Undercurrent (LUC), emerging below the Kuroshio from about 21A degrees N, intensifies southward, with its upper boundary surfacing around 12A degrees N. From there, part of the LUC separates from the coast, while the rest continues southward to join the Mindanao Current (MC). The MC extends to 2 000 m near the coast, and appears to be closely related to the subsurface cyclonic eddies which overlap low-salinity water from the North Pacific. The Mindanao Undercurrent (MUC), carrying waters from the South Pacific, shifts eastward upon approaching the Mindanao coast and eventually becomes part of the eastward undercurrent between 10A degrees N and 12A degrees N at 130A degrees E. In the upper 2 000 dbar, the total westward transport across 130A degrees E between 7.5A degrees N and 18A degrees N reaches 65.4 Sv (1 Sv = 10(-6) m(3)s(-1)), the northward transport across 18A degrees N from Luzon coast to 130A degrees E is up to 35.0 Sv, and the southward transport across 7.5A degrees N from Mindanao coast to 130A degrees E is 27.9 Sv.; Using the data of conductivity-temperature-depth (CTD) intensive observations conducted during Oct.-Nov. 2005, this study provides the first three-dimension quasi-synoptic description of the circulation in the western North Pacific. Several novel phenomena are revealed, especially in the deep ocean where earlier observations were very sparse. During the observations, the North Equatorial Current (NEC) splits at about 12A degrees N near the sea surface. This bifurcation shifts northward with depth, reaching about 20A degrees N at 1 000 m, and then remains nearly unchanged to as deep as 2 000 m. The Luzon Undercurrent (LUC), emerging below the Kuroshio from about 21A degrees N, intensifies southward, with its upper boundary surfacing around 12A degrees N. From there, part of the LUC separates from the coast, while the rest continues southward to join the Mindanao Current (MC). The MC extends to 2 000 m near the coast, and appears to be closely related to the subsurface cyclonic eddies which overlap low-salinity water from the North Pacific. The Mindanao Undercurrent (MUC), carrying waters from the South Pacific, shifts eastward upon approaching the Mindanao coast and eventually becomes part of the eastward undercurrent between 10A degrees N and 12A degrees N at 130A degrees E. In the upper 2 000 dbar, the total westward transport across 130A degrees E between 7.5A degrees N and 18A degrees N reaches 65.4 Sv (1 Sv = 10(-6) m(3)s(-1)), the northward transport across 18A degrees N from Luzon coast to 130A degrees E is up to 35.0 Sv, and the southward transport across 7.5A degrees N from Mindanao coast to 130A degrees E is 27.9 Sv. |
关键词 | North Pacific North Equatorial Current (Nec) Luzon Undercurrent (Luc) Mindanao Undercurrent (Muc) Volume Transport |
学科领域 | Limnology ; Oceanography |
DOI | 10.1007/s00343-009-9240-x |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000272422300033 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qdio.ac.cn/handle/337002/2412 |
专题 | 海洋环流与波动重点实验室 |
作者单位 | 1.Ocean Univ China, Phys Oceanog Lab, Qingdao 266003, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China |
推荐引用方式 GB/T 7714 | Xie Lingling,Tian Jiwei,Hu Dunxin,et al. A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2009,27(4):955-965. |
APA | Xie Lingling,Tian Jiwei,Hu Dunxin,&Wang Fan.(2009).A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,27(4),955-965. |
MLA | Xie Lingling,et al."A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 27.4(2009):955-965. |
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