Interannual variability in the North Pacific meridional overturning circulation

IOCAS-IR

	Interannual variability in the North Pacific meridional overturning circulation
	Liu HW(刘洪伟); Zhang QL(张启龙); Hou YY(侯一筠); Duan YL(段永亮)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2013-05-15
出版年	2013
卷号	v.31 期号:03 页码:197-212
文献类型	CNKI期刊论文
摘要	We analyzed the temporal and spatial variation, and interannual variability of the North Pacific meridional overturning circulation using an empirical orthogonal function method, and calculated mass transport using Simple Ocean Data Assimilation Data from 1958-2008. The meridional streamfunction field in the North Pacific tilts N-S; the Tropical Cell (TC), Subtropical Cell (STC), and Deep Tropical Cell (DTC) may be in phase on an annual time scale; the TC and the STC are out of phase on an interannual time scale, but the interannual variability of the DTC is complex. The TC and STC interannual variability is associated with ENSO (El Ni o-Southern Oscillation). The TC northward, southward, upward, and downward transports all weaken in El Ni os and strengthen in La Ni as. The STC northward and southward transports are out of phase, while the STC northward and downward transports are in phase. Sea-surface water that reaches the middle latitude and is subducted may not completely return to the tropics. The zonal wind anomalies over the central North Pacific, which control Ekman transport, and the east-west slope of the sea level may be major factors causing the TC northward and southward transport interannual variability and the STC northward and southward transports on the interannual time scale. The DTC northward and southward transports decrease during strong El Ni os and increase during strong La Ni as. DTC upward and downward transports are not strongly correlated with the Ni o-3 index and may not be completely controlled by ENSO.
关键词	North Pacific Ocean meridional overturning circulation interannual variation temporal and spatial variations
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;A010;
CNKI专题名称	气象学;海洋学;
分类号	P732
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Basic Research Program of China(973 Program)(Nos.2012CB417402,2007CB816002)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/190880
专题	中国科学院海洋研究所
作者单位	1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaves(KLOCAW),ChineseAcademyofSciences 3.GraduateUniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	Liu HW,Zhang QL,Hou YY,et al. Interannual variability in the North Pacific meridional overturning circulation. 2013.