Three long-lived anticyclonic eddies in the northern South China Sea

doi:10.1029/2010JC006790

IOCAS-IR > 海洋环流与波动重点实验室

	Three long-lived anticyclonic eddies in the northern South China Sea
	Nan, Feng 1; He, Zhigang 2; Zhou, Hui 3; Wang, Dongxiao 2
	2011-05-07
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	0148-0227
卷号	116 页码:C05002
文章类型	Article
摘要	[1] In August 2007, three long-lived anticyclonic eddies (ACE1, ACE2, and ACE3) were detected by both satellite sea level anomaly (SLA) map and in situ measurements in the northern South China Sea (SCS). ACE3 had a two-core (ACE3(1) and ACE3(2)) structure. In situ stations along 18 degrees N almost cut through the centers of ACE2 and ACE3 (2). Near the centers of ACE2 and ACE3(2), mean temperature and sound velocity are similar to 0.65 degrees C and similar to 2 m s(-1) larger than those in their surrounding areas, respectively, while mean salinity and density are similar to 0.02 psu and similar to 0.15 m(3) s (1) smaller than those in their surrounding areas due to downwelling near the eddy cores. The depths of maximum and minimum salinity near the eddy cores are similar to 65 m and similar to 35 m larger than those in their surrounding areas. The vertical depth with current speed larger than 0.05 m s (1) can reach similar to 900 m. Their detailed evolutionary processes were depicted based on the variation of geostrophic currents and the trajectories of five drifting buoys. ACE1 lasted 147 days, while ACE2 and ACE3 lasted 168 days and 210 days, respectively. ACE1 had a smaller mean SLA (18.8 cm) in its lifetime than ACE2 (21.8 cm) and ACE3 (25.3 cm) but had a larger negative mean vorticity (-7.7 x 10(-6) s(-1)) than ACE2 (-7.0 x 10(-6) s(-1)) and ACE3 (-7.0 x 10(-6) s(-1)). One short-lived anticyclonic eddy that split from ACE2 and another one that merged with ACE3 both had a smaller SLA, negative vorticity, and diameter than ACE2 and ACE3, respectively.; [1] In August 2007, three long-lived anticyclonic eddies (ACE1, ACE2, and ACE3) were detected by both satellite sea level anomaly (SLA) map and in situ measurements in the northern South China Sea (SCS). ACE3 had a two-core (ACE3(1) and ACE3(2)) structure. In situ stations along 18 degrees N almost cut through the centers of ACE2 and ACE3 (2). Near the centers of ACE2 and ACE3(2), mean temperature and sound velocity are similar to 0.65 degrees C and similar to 2 m s(-1) larger than those in their surrounding areas, respectively, while mean salinity and density are similar to 0.02 psu and similar to 0.15 m(3) s (1) smaller than those in their surrounding areas due to downwelling near the eddy cores. The depths of maximum and minimum salinity near the eddy cores are similar to 65 m and similar to 35 m larger than those in their surrounding areas. The vertical depth with current speed larger than 0.05 m s (1) can reach similar to 900 m. Their detailed evolutionary processes were depicted based on the variation of geostrophic currents and the trajectories of five drifting buoys. ACE1 lasted 147 days, while ACE2 and ACE3 lasted 168 days and 210 days, respectively. ACE1 had a smaller mean SLA (18.8 cm) in its lifetime than ACE2 (21.8 cm) and ACE3 (25.3 cm) but had a larger negative mean vorticity (-7.7 x 10(-6) s(-1)) than ACE2 (-7.0 x 10(-6) s(-1)) and ACE3 (-7.0 x 10(-6) s(-1)). One short-lived anticyclonic eddy that split from ACE2 and another one that merged with ACE3 both had a smaller SLA, negative vorticity, and diameter than ACE2 and ACE3, respectively.
学科领域	Oceanography
DOI	10.1029/2010JC006790
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000290410200001
引用统计	被引频次：124[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/337002/11617
专题	海洋环流与波动重点实验室
作者单位	1.Ocean Univ China, Coll Phys & Environm Oceanog, Qingdao 266003, Peoples R China 2.Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave Studies, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Nan, Feng,He, Zhigang,Zhou, Hui,et al. Three long-lived anticyclonic eddies in the northern South China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2011,116:C05002.
APA	Nan, Feng,He, Zhigang,Zhou, Hui,&Wang, Dongxiao.(2011).Three long-lived anticyclonic eddies in the northern South China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,116,C05002.
MLA	Nan, Feng,et al."Three long-lived anticyclonic eddies in the northern South China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 116(2011):C05002.

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