The Obduction of Equatorial 13 degrees C Water in the Pacific Identified by a Simulated Passive Tracer

doi:10.1175/2010JPO4358.1

IOCAS-IR > 海洋环流与波动重点实验室

	The Obduction of Equatorial 13 degrees C Water in the Pacific Identified by a Simulated Passive Tracer
	Qu, Tangdong 1; Gao, Shan 2; Fukumori, Ichiro 3; Fine, Rana A.4; Lindstrom, Eric J.5; Qu, TD, Univ Hawaii Manoa, IPRC, SOEST, 1680 East West Rd, Honolulu, HI 96822 USA
	2010-10-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	40 期号:10 页码:2282-2297
文章类型	Article
摘要	The obduction of equatorial 13 degrees C Water in the Pacific is investigated using a simulated passive tracer of the Consortium for Estimating the Circulation and Climate of the Ocean (ECCO). The result shows that the 13 degrees C Water initialized in the region 8 degrees N-8 degrees S, 130 degrees-90 degrees W enters the surface mixed layer in the eastern tropical Pacific, mainly through upwelling near the equator, in the Costa Rica Dome, and along the coast of Peru. Approximately two-thirds of this obduction occurs within 10 years after the 13 degrees C Water being initialized, with the upper portion of the water mass reaching the surface mixed layer in only about a month. The obduction of the 13 degrees C Water helps to maintain a cool sea surface temperature year-round, equivalent to a surface heat flux of about -6.0 W m(-2) averaged over the eastern tropical Pacific (15 degrees S-15 degrees N, 130 degrees W-eastern boundary) for the period of integration (1993-2006). During El Nino years, when the thermocline deepens as a consequence of the easterly wind weakening, the obduction of the 13 degrees C Water is suppressed, and the reduced vertical entrainment generates a warming anomaly of up to 10 W m(-2) in the eastern tropical Pacific and in particular along the coast of Peru, providing explanations for the warming of sea surface temperature that cannot be accounted for by local winds alone. The situation is reversed during La Nina years.; The obduction of equatorial 13 degrees C Water in the Pacific is investigated using a simulated passive tracer of the Consortium for Estimating the Circulation and Climate of the Ocean (ECCO). The result shows that the 13 degrees C Water initialized in the region 8 degrees N-8 degrees S, 130 degrees-90 degrees W enters the surface mixed layer in the eastern tropical Pacific, mainly through upwelling near the equator, in the Costa Rica Dome, and along the coast of Peru. Approximately two-thirds of this obduction occurs within 10 years after the 13 degrees C Water being initialized, with the upper portion of the water mass reaching the surface mixed layer in only about a month. The obduction of the 13 degrees C Water helps to maintain a cool sea surface temperature year-round, equivalent to a surface heat flux of about -6.0 W m(-2) averaged over the eastern tropical Pacific (15 degrees S-15 degrees N, 130 degrees W-eastern boundary) for the period of integration (1993-2006). During El Nino years, when the thermocline deepens as a consequence of the easterly wind weakening, the obduction of the 13 degrees C Water is suppressed, and the reduced vertical entrainment generates a warming anomaly of up to 10 W m(-2) in the eastern tropical Pacific and in particular along the coast of Peru, providing explanations for the warming of sea surface temperature that cannot be accounted for by local winds alone. The situation is reversed during La Nina years.
关键词	Eastern Tropical Pacific Sea-surface Temperature Costa-rica Dome Subsurface Countercurrents Indonesian Throughflow Tsuchiya Jet Annual Cycle Ocean Circulation Dynamics
学科领域	Oceanography
DOI	10.1175/2010JPO4358.1
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000283053400005
引用统计	被引频次：3[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/337002/1763
专题	海洋环流与波动重点实验室
通讯作者	Qu, TD, Univ Hawaii Manoa, IPRC, SOEST, 1680 East West Rd, Honolulu, HI 96822 USA
作者单位	1.Univ Hawaii Manoa, IPRC, SOEST, Honolulu, HI 96822 USA 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA 4.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA 5.NASA, Sci Miss Directorate, Washington, DC 20546 USA
推荐引用方式 GB/T 7714	Qu, Tangdong,Gao, Shan,Fukumori, Ichiro,et al. The Obduction of Equatorial 13 degrees C Water in the Pacific Identified by a Simulated Passive Tracer[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2010,40(10):2282-2297.
APA	Qu, Tangdong,Gao, Shan,Fukumori, Ichiro,Fine, Rana A.,Lindstrom, Eric J.,&Qu, TD, Univ Hawaii Manoa, IPRC, SOEST, 1680 East West Rd, Honolulu, HI 96822 USA.(2010).The Obduction of Equatorial 13 degrees C Water in the Pacific Identified by a Simulated Passive Tracer.JOURNAL OF PHYSICAL OCEANOGRAPHY,40(10),2282-2297.
MLA	Qu, Tangdong,et al."The Obduction of Equatorial 13 degrees C Water in the Pacific Identified by a Simulated Passive Tracer".JOURNAL OF PHYSICAL OCEANOGRAPHY 40.10(2010):2282-2297.

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