SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Reconstruction of Three-Dimensional Ocean Structure From Sea Surface Data: An Application of isQG Method in the Southwest Indian Ocean
Chen, Zhiqiang; Wang, Xidong1; Liu, Lei2
2020
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume125Issue:6Pages:e2020JC016351
AbstractUsing sea surface data, including sea surface temperature (SST), sea surface height (SSH), and sea surface salinity (SSS), from two reanalysis data sets as input, we explore the potential for retrieving subsurface three-dimensional (3-D) structures in the Southwest Indian Ocean (SWIO) based on the "interior+surface quasi-geostrophy" (isQG) method. We find that the isQG method is particularly successful south of 35 degrees S corresponding to greater SSH anomaly (SSHA) and to higher ratio of the barotropic mode (BT) and the first baroclinic mode (BC1). Meanwhile, higher-resolution surface data may provide more coherent retrieved results with original reanalysis data in the inactive eddy regions north of 35 degrees S, where coarser data set cannot resolve mesoscale signals. Based on a long time series reconstruction by the Simple Ocean Data Assimilation (SODA) surface data from 2011 to 2015 in the SWIO, our spectrum correlation analysis shows that the isQG solution achieves a better skill near the surface layer and under the thermocline depth with horizontal scale larger than 50 km, but it degrades from similar to 30- to 200-m depth south of 35 degrees S. In contrast, the spectral correlation north of 35 degrees S is relatively low, with correlation coefficient beyond (below) 0.5 for signals with a wavelength longer (shorter) than 200 km near surface layer and from 250- to 500-m depth. Mechanisms about the regional-dependent isQG skill are also discussed. This study should have important implications for both operational oceanography and ocean dynamics research in the SWIO, including the greater Agulhas system.
DepartmentLTO
KeywordisQG method Southwest Indian Ocean interior ocean's 3-D reconstruction baroclinic instability
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/18304
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.Hohai Univ, Coll Oceanog, Nanjing, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhiqiang,Wang, Xidong,Liu, Lei. Reconstruction of Three-Dimensional Ocean Structure From Sea Surface Data: An Application of isQG Method in the Southwest Indian Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2020,125(6):e2020JC016351.
APA Chen, Zhiqiang,Wang, Xidong,&Liu, Lei.(2020).Reconstruction of Three-Dimensional Ocean Structure From Sea Surface Data: An Application of isQG Method in the Southwest Indian Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,125(6),e2020JC016351.
MLA Chen, Zhiqiang,et al."Reconstruction of Three-Dimensional Ocean Structure From Sea Surface Data: An Application of isQG Method in the Southwest Indian Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 125.6(2020):e2020JC016351.
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