IOCAS-IR  > 海洋环流与波动重点实验室
Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry
Sun Che1,2; Ma Xiao3
2016-11-01
发表期刊SCIENCE CHINA-EARTH SCIENCES
卷号59期号:11页码:2213-2222
文章类型Article
摘要The vertical thermohaline structure in the western equatorial Pacific is examined with a Gravest Empirical Mode (GEM) diagnosis of in-situ mooring measurements. The poor GEM performance in estimating deep thermohaline variability from satellite altimetry confirms a lack of vertical coherence in the equatorial ocean. Mooring observation reveals layered equatorial water with phase difference up to 6 months between thermocline and sub-thermocline variations. The disjointed layers reflect weak geostrophy and resemble pancake structures in non-rotating stratified turbulence. A coherency theorem is then proved, stating that traditional stationary GEM represents in-phase coherent structure and can not describe vertically out-of-phase variability. The fact that stationary GEM holds both spatial and temporal coherence makes it a unique tool to diagnose vertical coherent structure in geophysical flows. The study also develops a non-stationary GEM projection that captures more than 40% of the thermohaline variance in the equatorial deep water.
关键词Equatorial Pacific Triton Buoys Satellite Altimetry Gem Vertical Coherence
DOI10.1007/s11430-016-0048-2
收录类别SCI
语种英语
WOS记录号WOS:000387396800011
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136204
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Natl Lab Marine Sci & Technol, Qingdao 266071, Peoples R China
3.State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China
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Sun Che,Ma Xiao. Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry[J]. SCIENCE CHINA-EARTH SCIENCES,2016,59(11):2213-2222.
APA Sun Che,&Ma Xiao.(2016).Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry.SCIENCE CHINA-EARTH SCIENCES,59(11),2213-2222.
MLA Sun Che,et al."Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry".SCIENCE CHINA-EARTH SCIENCES 59.11(2016):2213-2222.
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