Tidally induced upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer
文献类型：期刊论文
| 作者 | Lv Xingang; Qiao Fangli; Xia Changshui; Yuan Yeli |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2007-03-01 |
| 卷号 | 50期号:3页码:462-473 |
| 关键词 | Upwelling Dynamic Mechanism Numerical Simulation Tidal Movement Tidal Mixing Front |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-007-2050-0 |
| 文献子类 | Article |
| 英文摘要 | MASNUM wave-tide-circulation coupled numerical model (MASNUM coupled model, hereinafter) is developed based on the Princeton Ocean Model (POM). Both POM and MASNUM coupled model are applied in the numerical simulation of the upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer. The upwelling mechanisms are analyzed from the viewpoint of tide, and a new mechanism is proposed. The study suggests that the tidally inducing mechanism of the upwelling includes two dynamic aspects: the barotropic and the baroclinic process. On the one hand, the residual currents induced by barotropic tides converge near the seabed, and upwelling is generated to maintain mass conservation. The climbing of the residual currents along the sea bottom slope also contributes to the upwelling. On the other hand, tidal mixing plays a very important role in inducing the upwelling in the baroclinic sea circumstances. Strong tidal mixing leads to conspicuous front in the coastal waters. The considerable horizontal density gradient across the front elicits a secondary circulation clinging to the tidal front, and the upwelling branch appears near the frontal zone. Numerical experiments are designed to determine the importance of tide in inducing the upwelling. The results indicate that tide is a key and dominant inducement of the upwelling. Experiments also show that coupling calculation of the four main tidal constituents(M-2, S-2, K-1, and O-1), rather than dealing with the single M-2 constituent, improves the modeling precision of the barotropic tide-induced upwelling.; MASNUM wave-tide-circulation coupled numerical model (MASNUM coupled model, hereinafter) is developed based on the Princeton Ocean Model (POM). Both POM and MASNUM coupled model are applied in the numerical simulation of the upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer. The upwelling mechanisms are analyzed from the viewpoint of tide, and a new mechanism is proposed. The study suggests that the tidally inducing mechanism of the upwelling includes two dynamic aspects: the barotropic and the baroclinic process. On the one hand, the residual currents induced by barotropic tides converge near the seabed, and upwelling is generated to maintain mass conservation. The climbing of the residual currents along the sea bottom slope also contributes to the upwelling. On the other hand, tidal mixing plays a very important role in inducing the upwelling in the baroclinic sea circumstances. Strong tidal mixing leads to conspicuous front in the coastal waters. The considerable horizontal density gradient across the front elicits a secondary circulation clinging to the tidal front, and the upwelling branch appears near the frontal zone. Numerical experiments are designed to determine the importance of tide in inducing the upwelling. The results indicate that tide is a key and dominant inducement of the upwelling. Experiments also show that coupling calculation of the four main tidal constituents(M-2, S-2, K-1, and O-1), rather than dealing with the single M-2 constituent, improves the modeling precision of the barotropic tide-induced upwelling. |
| 学科主题 | Geosciences, Multidisciplinary |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000246031700015 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5227]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.State Ocean Adm, Key Lab Marine Sci & Numer Modling, MASNUM, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv Xingang,Qiao Fangli,Xia Changshui,et al. Tidally induced upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(3):462-473. |
| APA | Lv Xingang,Qiao Fangli,Xia Changshui,&Yuan Yeli.(2007).Tidally induced upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(3),462-473. |
| MLA | Lv Xingang,et al."Tidally induced upwelling off Yangtze River estuary and in Zhejiang coastal waters in summer".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.3(2007):462-473. |
入库方式： OAI收割
来源：海洋研究所
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