Variability of Antarctic Intermediate Water south of Australia and its relationship with frontal waves

IOCAS-IR

	Variability of Antarctic Intermediate Water south of Australia and its relationship with frontal waves
	ZHANG LinLin ; YAN XiaoMei ; SUN Che ; HU DunXin
发表期刊	Science China(Earth Sciences)
ISSN	1674-7313
	2016-08-01
出版年	2016
卷号	v.59 期号:08 页码:166-174
文献类型	CNKI期刊论文
摘要	A streamfunction EOF method is applied to a time series of hydrographic sections in the Southern Ocean south of Australia to study water mass variations. Results show that there are large thermohaline variations north of the Subantarctic Front (SAF) at 300–1500 dbar level, indicating upwelling and downwelling of the Antarctic Intermediate Water (AAIW) along isopycnal surfaces. Based on the latest altimeter product, Absolute Dynamic Topography, a mechanism due to frontal wave propagation is proposed to explain this phenomenon, and an index for frontal waves is defined. When the frontal wave is in positive (negative) phase, the SAF flows northeastward (southeastward) with the fresh AAIW downwelling (upwelling). Such mesoscale processes greatly enhance cross-frontal exchanges of water masses. Spectral analysis shows that frontal waves in the Southern Ocean south of Australia are dominated by a period of about 130 days with a phase speed of 4 cm/s and a wavelength of 450 km.
关键词	Antarctic Intermediate Water(AAIW) Stream-coordinates Frontalwave EOF
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	P731.2
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 (Grant No. 41006114) ; the National Science and Technology Major Project (Grant No. 2012YQ12003907) ; the National Key Basic Research Program of China (Grant Nos. 2012CB417401 and 2013CB956202) ; the CAS Strategic Priority Research Program (Grant No. XDA11010101) ; the NSFC-Shandong Joint Fund for Marine Science Research Center (Grant No. U1406401)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/189590
专题	中国科学院海洋研究所
作者单位	1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaves,ChineseAcademyofSciences 3.LaboratoryforOceanandClimateDynamics,QingdaoNationalLaboratoryforMarineScienceandTechnology
推荐引用方式 GB/T 7714	ZHANG LinLin,YAN XiaoMei,SUN Che,et al. Variability of Antarctic Intermediate Water south of Australia and its relationship with frontal waves. 2016.