Weakening of the Kuroshio Intrusion into the South China Sea over the Past Two Decades

doi:10.1175/JCLI-D-12-00315.1

IOCAS-IR > 海洋环流与波动重点实验室

	Weakening of the Kuroshio Intrusion into the South China Sea over the Past Two Decades
	Nan, Feng 1,2,3; Xue, Huijie 3; Chai, Fei 3; Wang, Dongxiao 4; Yu, Fei 1; Shi, Maochong 2; Guo, Peifang 2; Xiu, Peng 3; Xue, HJ
	2013-10-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	26 期号:20 页码:8097-8110
文章类型	Article
摘要	Inferred from the satellite and in situ hydrographic data from the 1990s and 2000s, the Kuroshio intrusion into the South China Sea (SCS) had a weakening trend over the past two decades. Associated with the weakened Kuroshio intrusion, the Kuroshio loop and eddy activity southwest of Taiwan became weaker, whereas the water above the salinity minimum became less saline in the northern SCS. The sea surface height southwest of Taiwan increased at a slower rate compared to other regions of the SCS because of the weakened Kuroshio intrusion. Simulations using the Regional Ocean Modeling System (ROMS) Pacific model show that the strength of the Kuroshio intrusion into the SCS decreased from 1993 to 2010 with a negative trend, -0.24 sverdrups (Sv) yr(-1) (1 Sv 10(6) m(3) s(-1)), in the total Luzon Strait transport (LST). Although wind-induced Ekman transport through the Luzon Strait became weaker, the magnitude at 0.001 Sv yr(-1) was too small to compensate for the negative trend of the LST. On the other hand, the piling up of the water induced by monsoon winds was an important mechanism for changing the pressure gradient across the Luzon Strait and eventually affecting the LST. The sea level gradient between the western Pacific and the SCS had a negative trend, -0.10 cm yr(-1), corresponding to a negative trend in the geostrophic transport at -0.20 Sv yr(-1). The Kuroshio transport east of Luzon Island also had a negative trend, which might also be linked to the weakening Kuroshio intrusion.; Inferred from the satellite and in situ hydrographic data from the 1990s and 2000s, the Kuroshio intrusion into the South China Sea (SCS) had a weakening trend over the past two decades. Associated with the weakened Kuroshio intrusion, the Kuroshio loop and eddy activity southwest of Taiwan became weaker, whereas the water above the salinity minimum became less saline in the northern SCS. The sea surface height southwest of Taiwan increased at a slower rate compared to other regions of the SCS because of the weakened Kuroshio intrusion. Simulations using the Regional Ocean Modeling System (ROMS) Pacific model show that the strength of the Kuroshio intrusion into the SCS decreased from 1993 to 2010 with a negative trend, -0.24 sverdrups (Sv) yr(-1) (1 Sv 10(6) m(3) s(-1)), in the total Luzon Strait transport (LST). Although wind-induced Ekman transport through the Luzon Strait became weaker, the magnitude at 0.001 Sv yr(-1) was too small to compensate for the negative trend of the LST. On the other hand, the piling up of the water induced by monsoon winds was an important mechanism for changing the pressure gradient across the Luzon Strait and eventually affecting the LST. The sea level gradient between the western Pacific and the SCS had a negative trend, -0.10 cm yr(-1), corresponding to a negative trend in the geostrophic transport at -0.20 Sv yr(-1). The Kuroshio transport east of Luzon Island also had a negative trend, which might also be linked to the weakening Kuroshio intrusion.
关键词	Boundary Currents Channel Flows Eddies Mesoscale Processes Ocean Circulation Ocean Dynamics
学科领域	Meteorology & Atmospheric Sciences
DOI	10.1175/JCLI-D-12-00315.1
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000325269800022
WOS关键词	NORTH EQUATORIAL CURRENT ; WESTERN BOUNDARY CURRENT ; INTERANNUAL VARIABILITY ; LUZON STRAIT ; WATER EXCHANGE ; PACIFIC ; OCEAN ; MODEL ; GAP ; CIRCULATION
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：68[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/337002/16452
专题	海洋环流与波动重点实验室
通讯作者	Xue, HJ
作者单位	1.Chinese Acad Sci, Key Lab Ocean Circulat & Wave Studies, Inst Oceanol, Qingdao, Peoples R China 2.Ocean Univ China, Coll Phys & Environm Oceanog, Qingdao, Peoples R China 3.Univ Maine, Sch Marine Sci, Orono, ME 04469 USA 4.Chinese Acad Sci, Key Lab Trop Marine Environm Dynam, South China Sea Inst Oceanol, Guangzhou, Guangdong, 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	Nan, Feng,Xue, Huijie,Chai, Fei,et al. Weakening of the Kuroshio Intrusion into the South China Sea over the Past Two Decades[J]. JOURNAL OF CLIMATE,2013,26(20):8097-8110.
APA	Nan, Feng.,Xue, Huijie.,Chai, Fei.,Wang, Dongxiao.,Yu, Fei.,...&Xue, HJ.(2013).Weakening of the Kuroshio Intrusion into the South China Sea over the Past Two Decades.JOURNAL OF CLIMATE,26(20),8097-8110.
MLA	Nan, Feng,et al."Weakening of the Kuroshio Intrusion into the South China Sea over the Past Two Decades".JOURNAL OF CLIMATE 26.20(2013):8097-8110.

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