Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry
文献类型：CNKI期刊论文
| 作者 | SUN Che; MA Xiao
|
| 发表日期 | 2016-11-01 |
| 出处 | Science China(Earth Sciences)
 |
| 关键词 | Equatorial Pacific TRITON buoys Satellite altimetry GEM Vertical coherence |
| 英文摘要 | 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Basic Research Program of China (Grant No.2012CB417400) ; the National Natural Science Foundation of China (Grant Nos. 41576017 & U1406401) |
| 卷 | v.59期:11页:129-138 |
| 语种 | 英文; |
| 分类号 | P715.6;P731.27 |
| ISSN号 | 1674-7313 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/189507]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.NationalLaboratoryforMarineScienceandTechnology 3.StateKeyLaboratoryofSatelliteOceanEnvironmentDynamics,SecondInstituteofOceanography,StateOceanicAdministration |
| 推荐引用方式 GB/T 7714 | SUN Che,MA Xiao. Estimating thermohaline variability of the equatorial Pacific Ocean from satellite altimetry. 2016. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。