Impacts of Indonesian Throughflow on seasonal circulation in the equatorial Indian Ocean

IOCAS-IR

	Impacts of Indonesian Throughflow on seasonal circulation in the equatorial Indian Ocean
	Wang J(王晶); Yuan DL(袁东亮); Zhao X(赵霞)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2017-11-15
出版年	2017
卷号	v.35 期号:06 页码:3-16
文献类型	CNKI期刊论文
摘要	Impacts of the Indonesian Throughflow(ITF) on seasonal circulation in the equatorial eastern Indian Ocean are investigated using the ocean-only model LICOM by opening and closing ITF passages. LICOM had daily forcing from NCEP reanalysis data during 2000–2011. It can reproduce vertical profiles of mean density and buoyancy frequency of World Ocean Atlas 2013 data. The model also simulates well annual oscillation in the central Indian Ocean and semiannual oscillation in the eastern Indian Ocean of sea level anomalies(SLA) using satellite altimeter data, as well as the semiannual oscillation of surface zonal equatorial currents of Ocean Surface Current Analyses Real Time current data in the equatorial Indian Ocean. The wave decomposition method is used to analyze the propagation and reflection of equatorial long waves based on LICOM output. Wave analysis suggests that ITF blockage mainly influences waves generated from the Indian Ocean but not the Pacific Ocean, and eastern boundary reflections play an important role in semiannual oscillations of SLA and zonal current dif ferences in the equatorial Indian Ocean associated with ITF. Reconstructed ITF-caused SLA using wave decomposition coefficient dif ferences between closed and open ITF-passage experiments suggest both Kelvin and Rossby waves from the first baroclinic mode have comparable contributions to the semiannual oscillations of SLA diff erence. However, reconstructed ITFcaused surface zonal currents at the equator suggest that the first meridional-mode Rossby wave has much greater contribution than the first baroclinic mode Kelvin wave. Both reconstructed sea level and zonal currents demonstrate that the first baroclinic mode has a greater contribution than other baroclinic modes.
关键词	Indonesian Throughfl ow(ITF) blockage seasonal circulation wave decomposition semiannual oscillation Indian Ocean
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;
CNKI专题名称	海洋学;
分类号	P731.27
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 Natural Science Foundation of China(No.41206018) ; the National Natural Science Foundation of China(Nos.41176019,41421005,U1406401) ; the Chinese Academy of Sciences(No.XDA11010203)to WANG Jing ; the Chinese Academy of Sciences(No.XDA11010301) ; the National Basic Research Program of China(973 Program)(No.2012CB956001) ; the Specialized Scientific Research Project for Public Welfare Industries(Meteorology)(No.GYHY201306018) ; the State Oceanic Administration of China(No.GASI-03-01-01-05)to YUAN Dongliang
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/189098
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.LaboratoryforOceanandClimateDynamics,QingdaoNationalLaboratoryforMarineScienceandTechnology
推荐引用方式 GB/T 7714	Wang J,Yuan DL,Zhao X. Impacts of Indonesian Throughflow on seasonal circulation in the equatorial Indian Ocean. 2017.