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Thermohaline intrusions in the thermocline of the western tropical Pacific Ocean
Li Yuanlong1,2; Wang Fan1; Wang, F
2013-07-01
发表期刊ACTA OCEANOLOGICA SINICA
ISSN0253-505X
卷号32期号:7页码:47-56
文章类型Article
摘要The existing high-resolution hydrographic data in the western tropical Pacific Ocean are used to explore the spatial distribution and primary characteristics of thermohaline intrusions in the thermocline. Statistics show that the vertical scales of intrusions are 20-40 m in the upper thermocline (22.0-26.0 sigma(0)) and 40-80 m in the lower thermocline (26.0-27.2 sigma(0)). In the upper thermocline, the most intensive intrusions exist at the equatorial front (EF) where north/south Pacific water masses converge, and the westward spreading of the north Pacific tropical water (NPTW) in the Philippines Sea also produces patches of intrusions surrounding its high-salinity tongue. In the lower thermocline, intrusions are also strong at the tropical front (TF) which is the boundary between the north Pacific subtropical/tropical waters. At the bottom of the thermocline (at about 27.0 sigma(0)), intrusions mainly exist near the western boundary, which are produced by intermediate water convergence through the advection of subthermocline western boundary flows. Most strikingly a "C"-shape distribution of intrusions at around 26.4 sigma(0) is revealed, covering the vicinity of the EF, the TF, and the Mindanao Current (MC), i.e., the western boundary pathway of the north Pacific subtropical cell (STC). Synoptic section analysis reveals that intrusions are more prominent on the warm/salty flank of the fronts, implying more cross-front tongues of cold/fresh water. Among the intrusions, those at the EF are of best lateral coherence which implies a unique driving mechanism involving near-inertial velocity perturbations near the equator.; The existing high-resolution hydrographic data in the western tropical Pacific Ocean are used to explore the spatial distribution and primary characteristics of thermohaline intrusions in the thermocline. Statistics show that the vertical scales of intrusions are 20-40 m in the upper thermocline (22.0-26.0 sigma(0)) and 40-80 m in the lower thermocline (26.0-27.2 sigma(0)). In the upper thermocline, the most intensive intrusions exist at the equatorial front (EF) where north/south Pacific water masses converge, and the westward spreading of the north Pacific tropical water (NPTW) in the Philippines Sea also produces patches of intrusions surrounding its high-salinity tongue. In the lower thermocline, intrusions are also strong at the tropical front (TF) which is the boundary between the north Pacific subtropical/tropical waters. At the bottom of the thermocline (at about 27.0 sigma(0)), intrusions mainly exist near the western boundary, which are produced by intermediate water convergence through the advection of subthermocline western boundary flows. Most strikingly a "C"-shape distribution of intrusions at around 26.4 sigma(0) is revealed, covering the vicinity of the EF, the TF, and the Mindanao Current (MC), i.e., the western boundary pathway of the north Pacific subtropical cell (STC). Synoptic section analysis reveals that intrusions are more prominent on the warm/salty flank of the fronts, implying more cross-front tongues of cold/fresh water. Among the intrusions, those at the EF are of best lateral coherence which implies a unique driving mechanism involving near-inertial velocity perturbations near the equator.
关键词Thermohaline Intrusions Thermocline Water Mass Western Tropical Pacific
学科领域Oceanography
DOI10.1007/s13131-013-0331-3
URL查看原文
收录类别SCI
语种英语
WOS研究方向Oceanography
WOS类目Oceanography
WOS记录号WOS:000321808000007
WOS关键词SUBTROPICAL FRONTAL ZONE ; NORTH EQUATORIAL CURRENT ; PHILIPPINE SEA ; 3-DIMENSIONAL STRUCTURE ; INERTIAL INSTABILITY ; INTERMEDIATE WATER ; FINE-STRUCTURE ; REGIME SHIFTS ; ARCTIC-OCEAN ; MINDANAO
WOS标题词Science & Technology ; Physical Sciences
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/16447
专题海洋环流与波动重点实验室
通讯作者Wang, F
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
第一作者单位海洋环流与波动重点实验室
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Li Yuanlong,Wang Fan,Wang, F. Thermohaline intrusions in the thermocline of the western tropical Pacific Ocean[J]. ACTA OCEANOLOGICA SINICA,2013,32(7):47-56.
APA Li Yuanlong,Wang Fan,&Wang, F.(2013).Thermohaline intrusions in the thermocline of the western tropical Pacific Ocean.ACTA OCEANOLOGICA SINICA,32(7),47-56.
MLA Li Yuanlong,et al."Thermohaline intrusions in the thermocline of the western tropical Pacific Ocean".ACTA OCEANOLOGICA SINICA 32.7(2013):47-56.
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