Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies
文献类型：期刊论文
| 作者 | Lu, Zhumin1,5; Wang, Guihua3,4,6; Shang, Xiaodong1,5 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 出版日期 | 2020 |
| 卷号 | 125期号:5页码:e2020JC016097 |
| ISSN号 | 2169-9275 |
| 英文摘要 | A tropical cyclone (TC) induces the oceanic geostrophic response, which perturbs the underlying ocean eddy field. This study investigates the strength and spatial structure of isopycnal undulations and potential vorticity (PV) changes linked with the geostrophic response by use of a linear, two-layer theory and an OGCM. It is found that the strength and cross-track length scale of the geostrophic response are well compared with those of background eddies, highlighting the ability of a TC to perturb underlying ocean eddies. More importantly, the TC-induced PV perturbation is confined within the thermocline between 100 and 300 m depth, causing the 3D quasi-geostrophic evolution of the perturbed eddies. The length scale of upwelling perturbation (which is similar to 130 km) is larger than that of PV response (similar to 50 km). This scale disparity means that the patterns of the TC-induced perturbations are subject to eddy-TC separation distance. Consequently, the perturbation of a TC to an eddy is significant (negligible) when the eddy-TC separation distance is less than 80 km (larger than 200 km). This study provides a starting point for understanding the TC-induced 3D evolution of the perturbed ocean eddy field. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18315]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 作者单位 | 1.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 2.Fudan Univ, CMA FDU Joint Lab Marine Meteorol, Shanghai, Peoples R China 3.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China 4.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China 5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 6.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Zhumin,Wang, Guihua,Shang, Xiaodong. Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2020,125(5):e2020JC016097. |
| APA | Lu, Zhumin,Wang, Guihua,&Shang, Xiaodong.(2020).Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,125(5),e2020JC016097. |
| MLA | Lu, Zhumin,et al."Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 125.5(2020):e2020JC016097. |
入库方式： OAI收割
来源：南海海洋研究所
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