The subsurface water in the North Pacific tropical gyre

doi:10.1016/j.dsr.2013.01.002

IOCAS-IR > 海洋环流与波动重点实验室

	The subsurface water in the North Pacific tropical gyre
	Wang, Fan; Li, Yuanlong; Zhang, Yanhui; Hu, Dunxin; Wang, F
	2013-05-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	75 页码:78-92
文章类型	Article
摘要	The subsurface water (22.5-25.5 sigma(0)) in the North Pacific tropical gyre (NPTG; 130 degrees E-150 degrees W, 5 degrees-10 degrees N), addressed as the North Pacific tropical subsurface water (TSSW), features a lateral salinity minimum and vertical salinity maximum in the western and central Pacific Ocean. In this study this water body is investigated using Argo float profiles and Word Ocean Atlas 2009 (WOA09) dataset. Comparing with the North Pacific Tropical water (NPTW), the TSSW is of lower salinity, lower oxygen, higher nutrient concentration, and denser vertical salinity maximum S-max. Subtropical ventilation and local ocean dynamics are both important in setting up its unique characteristics. Our analysis shows that its properties, structure, and seasonal variations are diverse at different longitudes. In the western Pacific, the TSSW is mainly of North Pacific water origin. Its high salinity core is formed by the southward intrusion of the NPTW. Diapycnal mixing with the surface-layer fresh water reduces its salinity and lowers its S-max to denser isopycnals. The TSSW in the western Pacific can be regarded as a diluted portion of the NPTW. In the central Pacific, advection of salty water masses from both hemispheres and westward invasion of the eastern Pacific fresh water are all important in regulating its characteristics. The TSSW in the central Pacific is a mixture of various water sources formed under highly variable flow pattern and intensive mixing. The TSSW should be regarded as an important subsurface water body connecting North/South Pacific thermocline water, although it might not be a water mass by traditional definition. (C) 2013 Elsevier Ltd. All rights reserved.; The subsurface water (22.5-25.5 sigma(0)) in the North Pacific tropical gyre (NPTG; 130 degrees E-150 degrees W, 5 degrees-10 degrees N), addressed as the North Pacific tropical subsurface water (TSSW), features a lateral salinity minimum and vertical salinity maximum in the western and central Pacific Ocean. In this study this water body is investigated using Argo float profiles and Word Ocean Atlas 2009 (WOA09) dataset. Comparing with the North Pacific Tropical water (NPTW), the TSSW is of lower salinity, lower oxygen, higher nutrient concentration, and denser vertical salinity maximum S-max. Subtropical ventilation and local ocean dynamics are both important in setting up its unique characteristics. Our analysis shows that its properties, structure, and seasonal variations are diverse at different longitudes. In the western Pacific, the TSSW is mainly of North Pacific water origin. Its high salinity core is formed by the southward intrusion of the NPTW. Diapycnal mixing with the surface-layer fresh water reduces its salinity and lowers its S-max to denser isopycnals. The TSSW in the western Pacific can be regarded as a diluted portion of the NPTW. In the central Pacific, advection of salty water masses from both hemispheres and westward invasion of the eastern Pacific fresh water are all important in regulating its characteristics. The TSSW in the central Pacific is a mixture of various water sources formed under highly variable flow pattern and intensive mixing. The TSSW should be regarded as an important subsurface water body connecting North/South Pacific thermocline water, although it might not be a water mass by traditional definition. (C) 2013 Elsevier Ltd. All rights reserved.
关键词	Water Mass North Pacific Tropical Gyre North Pacific Tropical Water Subsurface Salinity Maximum Ventilated Thermocline
学科领域	Oceanography
DOI	10.1016/j.dsr.2013.01.002
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:000317888800007
WOS关键词	SEA-SURFACE SALINITY ; MERIDIONAL OVERTURNING CIRCULATION ; WESTERN EQUATORIAL PACIFIC ; PHILIPPINE SEA ; INTERANNUAL VARIABILITY ; THERMOCLINE WATER ; BARRIER LAYER ; ROSSBY WAVES ; OCEAN ; PRECIPITATION
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：12[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/337002/16444
专题	海洋环流与波动重点实验室
通讯作者	Wang, F
作者单位	Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
第一作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Wang, Fan,Li, Yuanlong,Zhang, Yanhui,et al. The subsurface water in the North Pacific tropical gyre[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2013,75:78-92.
APA	Wang, Fan,Li, Yuanlong,Zhang, Yanhui,Hu, Dunxin,&Wang, F.(2013).The subsurface water in the North Pacific tropical gyre.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,75,78-92.
MLA	Wang, Fan,et al."The subsurface water in the North Pacific tropical gyre".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 75(2013):78-92.

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