Correlation analysis of the North Equatorial Current bifurcation and the Indonesian Throughflow

ZHAO Yunxia; WEI Zexun; WANG Yonggang; XU Tengfei; FENG Ying

doi:10.1007/s13131-015-0736-2

北赤道流分岔点与印尼贯穿流的相关分析

doi: 10.1007/s13131-015-0736-2

1.
中国海洋大学海洋环境学院, 山东青岛 266100;国家海洋局第一海洋研究所, 山东青岛 266061
2.
国家海洋局第一海洋研究所, 山东青岛 266061;青岛海洋科学与技术国家实验室, 区域海洋动力学和数值模拟功能实验室, 山东青岛 266071
3.
国家海洋局第一海洋研究所, 山东青岛 266061

计量
- 文章访问数: 1543
- HTML全文浏览量: 62
- PDF下载量: 816
- 被引次数: 0
出版历程
- 收稿日期: 2014-09-23
- 修回日期: 2015-02-28

Correlation analysis of the North Equatorial Current bifurcation and the Indonesian Throughflow

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Function Laboratory for Ocean Dynamics and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 利用1958-2007年的SODA月平均资料,对北太平洋西边界流(NKM)、北赤道流分岔点位置(NBL)和印尼贯穿流(ITF)的季节、年际变化进行分析。在此基础上,对NBL、ITF流量、NEC流量及Niño3.4区指数的年际变化做经验模态分解(EMD),并设计实验对本征模函数(IMFs)做超前滞后相关分析。季节变化的分析结果显示:NBL春夏南移,秋冬北移,年平均在14.33 °N左右;ITF流量北半球夏季大、冬季小,其年平均流量为7.75×10⁶ m³/s。年际变化的分析结果显示:北赤道流流场的变迁是ENSO事件的一个前兆,NBL的南北震荡将在2个月后对Niño3.4区指数有响应,且二者呈正相关,最大相关系数为0.53。NBL北移,ITF流量减小,NBL超前ITF流量变化7个月时,二者正相关最大,相关系数为0.43。在El Niño年,NEC和黑潮(KC)流量减小,棉兰老流(MC)流量增加,ITF流量减小,ITF流量变化滞后Niño3.4指数变化3个月。La Niña年则相反。
- 北赤道流分岔点 /
- 印尼贯穿流 /
- 经验模态分解 /
- 超前滞后相关分析
Abstract: Based on monthly mean Simple Ocean Data Assimilation (SODA) products from 1958 to 2007, this study analyzes the seasonal and interannual variability of the North Equatorial Current (NEC) bifurcation latitude and the Indonesian Throughflow (ITF) volume transport. Further, Empirical Mode Decomposition (EMD) method and lag-correlation analysis are employed to reveal the relationships between the NEC bifurcation location, NEC and ITF volume transport and ENSO events. The analysis results of the seasonal variability show that the annual mean location of NEC bifurcation in upper layer occurs at 14.33°N and ITF volume transport has a maximum value in summer, a minimum value in winter and an annual mean transport of 7.75×10⁶ m³/s. The interannual variability analysis indicates that the variability of NEC bifurcation location can be treated as a precursor of El Niño. The correlation coefficient between the two reaches the maximum of 0.53 with a time lag of 2 months. The ITF volume transport is positively related with El Niño events with a maximum coefficient of 0.60 by 3 months. The NEC bifurcation location is positively correlated with the ITF volume transport with a correlation coefficient of 0.43.
- North Equatorial Current bifurcation /
- Indonesian Throughflow /
- Empirical Mode Decomposition /
- lagcorrelation analysis

HTML全文

参考文献(38)

Blanke B, Raynaud S. 1997. Kinematics of the Pacific Equatorial Undercurrent: an Eulerian and Lagrangian approach from GCM results. J Phys Oceanogr, 27(6): 1038-1053

Carton J A, Chepurin G, Cao Xianhe, et al. 2000. A simple ocean data assimilation analysis of the global upper ocean 1950-95. Part I: Methodology. J Phys Oceanogr, 30(2): 294-309

Carton J A, Giese B S. 2008. A reanalysis of ocean climate using simple ocean data assimilation. Mon Wea Rev, 136(8): 2999-3017

Chen Zhaohui, Wu Lixin. 2011. Dynamics of the seasonal variation of the North Equatorial Current bifurcation. J Geophys Res, 116(C2): C02018

Döös K. 1995. Interocean exchange of water masses. J Geophys Res, 100(C7): 13499-13514

Fang Guohong, Susanto R D, Wirasantosa S, et al. 2010. Volume, Heat, and freshwater transports from the South China Sea to Indonesian Seas in the boreal winter of 2007-2008. J Geophys Res, 115: C12020

Fang Guohong, Wang Yonggang, Wei Zexun, et al. 2009. Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model. Dynamics of Atmospheres and Oceans, 47(1-3): 55-72

Godfrey J S. 1989. A Sverdrup model of the depth-integrated flow for the world ocean allowing for island circulations. Geophysical and Astrophysical Fluid Dynamics, 45(1-2): 89-112

Gordon A L. 1986. Interocean exchange of thermocline water. J Geophys Res, 91(C4): 5037-5046

Gordon A L, Sprintall J, Van Aken H M, et al. 2010. The Indonesian throughflow during 2004-2006 as observed by the INSTANT program. Dynamics of Atmospheres and Oceans, 50(2): 115-128

Huang N E, Shen Zheng, Long S R, et al. 1998. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proc R Soc Lond, A 454(1971): 903-995

Huang N E, Shen Zheng, Long S R. 1999. A new view of nonlinear water waves: the Hilbert spectrum. A Rev Fluid Mech, 31: 417-457 Jin Feifei. 1997. An equatorial ocean recharge paradigm for ENSO. Part: Conceptual model. Journal of Atmospheric Sciences, 54(7): 811-829

Kim Y Y, Qu Tangdong, Jensen T, et al. 2004. Seasonal and interannual variations of the North Equatorial Current bifurcation in a high-resolution OGCM. J Geophys Res, 109: C03040

Li Chongyin, Mu Mingquan. 1999. El Niño occurrence and sub-surface ocean temperature anomalies in the Pacific Warm Pool. Chinese Journal of Atmospheric Sciences (in Chinese), 23(5): 513-521

Liu Qinyan, Huang Ruixin, Wang Dongxiao, et al. 2006. Interplay between the Indonesian throughflow and the South China sea throughflow. Chinese Science Bulletin, 51(2): 50-58

Liu Qinyan, Huang Ruixin, Wang Dongxiao. 2012. Implication of the South China Sea throughflow for the interannual variability of the regional upper-ocean heat content. Advances in Atmospheric Sciences, 29(1): 54-62

Masumoto Y, Yamagata T. 1996. Seasonal variability of the Indonesian throughflow in a general ocean circulation model. J Geophys Res, 101(C5): 12287-12293

Meng Qingjia, Wang Fan, Liu Na. 2011. Low-frequency variability of the North Equatorial Current bifurcation in the past 40 years from SODA. Acta Oceanologica Sinica, 30(3): 14-19

Metzger E, Hurlburt H E. 1996. The nondeterministic nature of Kuroshio penetration and eddy shedding in the South China Sea. J Phys Oceanogr, 31(7): 1712-1732

Nitani H. 1972. Beginning of the Kuroshio. In: Stommel H, Yoshida K,eds. Kuroshio: Its physical aspects. Tokyo: Univ of Tokyo Press, 129-163

Qiu Bo, Chen Shuiming. 2010. Interannual-to-decadal variability in the bifurcation of the North Equatorial Current off the Philippines. J Phys Oceanogr, 40(11): 2525-2538

Qiu Bo, Lukas R. 1996. Seasonal and interannual variability of the North Equatorial Current, the Mindanao Current, and the Kuroshio along the Pacific western boundary. J Geophys Res, 101(C5): 12315-12330

Qu Tangdong. 2002. Depth distribution of the subtropical gyre in the North Pacific. Journal of Oceanography, 58(3): 525-529

Qu Tangdong, Lukas R. 2003. The bifurcation of the North Equatorial Current in the Pacific. J Phys Oceanogr, 33(1): 5-18

Qu Tangdong, Mitsudera H, Yamagata T. 1998. On the western boundary currents in the Philippine Sea. J Geophys Res, 103(C4): 7537-7548

Reid J L, Arthur R S. 1975. Interpretation of maps of geopotential anomaly for the deep Pacific Ocean. J Mar Res, 33: 37-52

Sprintall J, Wijffels S E, Molcard R, et al. 2009. Direct estimates of the Indonesian Throughflow entering the Indian Ocean: 2004-2006. J Geophys Res, 114: C07001

Toole J M, Millard R C, Wang Z, et al. 1990. Observations of the Pacific North Equatorial Current bifurcation at the Philippine coast. J Phys Oceanogr, 20(2): 307-318

Toole J M, Zou E, Millard R C. 1988. On the circulation of the upper waters in the western equatorial Pacific Ocean. Deep-Sea Res Part A, 35(9): 1451-1482

Vries P, Döös K. 2001. Calculating Lagrangian trajectories using timedependent velocity fields. J Atmos Ocean Technol, 18(6): 1092-1101

Wang Qingye, Hu Dunxin. 2006. Bifurcation of the North Equatorial Current derived from altimetry in the Pacific Ocean. J Hy-drodyn, Ser B, 18(5): 620-626

Wang Fujun, Hu Dunxin. 2012. A time-dependent baroclinic model on NEC bifurcation. Chinese Journal of Oceanology and Limnology, 30(1): 186-191

Wijffels S, Firing E, Toole J M. 1995. The mean structure and variability of the Mindanao Current at 8°N. J Geophys Res, 100(C9): 18421-18435

Wu Haiyan, Li Chongyin, Zhang Ming. 2010. The preliminary numerical research of effects of ITF on tropical Pacific-Indian Ocean associated temperature anomaly mode. Journal of Tropical Meteorology (in Chinese), 26(5): 513-520

Wyrtki K. 1975. Fluctuations of the dynamic topography in the Pacific Ocean. J Phys Oceanogr, 5(3): 450-459

Yaremchuk M, Qu Tangdong. 2004. Seasonal variability of the largescale currents near the coast of the Philippines. J Phys Oceanogr, 34(4): 844-855

Zheng Quanan, Fang Guohong, Song Y T. 2006. Introduction to special section: dynamics and circulation of the Yellow, East, and South China Seas. J Geophys Res, 111(C11): C11S01

Zheng Quanan, Hu Jianyu, Zhu Benli, et al. 2014. Standing wave modes observed in the South China Sea deep basin. J Geophys Res, 119(7): 4185-4199

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1543
HTML全文浏览量: 62
PDF下载量: 816
被引次数: 0

北赤道流分岔点与印尼贯穿流的相关分析

doi: 10.1007/s13131-015-0736-2

计量

出版历程

Correlation analysis of the North Equatorial Current bifurcation and the Indonesian Throughflow

计量

出版历程

目录