Spatial-temporal patterns and driving mechanisms of semiannual variations in the Philippine Sea
文献类型：期刊论文
| 作者 | Zhao, Jun1,2 ; Li, Yuanlong1,2; Wang, Fan1; Zhai, Fangguo1,2; Yu, Xiaolin3
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| 刊名 | DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
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| 出版日期 | 2012-10-01 |
| 卷号 | 68页码:105-115 |
| 关键词 | Semiannual variations Sea surface height NEC bifurcation Philippine Sea Wind forcing |
| ISSN号 | 0967-0637 |
| 通讯作者 | Wang, F (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China. |
| 英文摘要 | Satellite altimetric sea surface height (SSH) measurements from 1992 through 2010 are used to explore the oceanic semiannual variations in the Philippine Sea (PS). Pronounced semiannual SSH variations are detected within two zonal bands. One lies east of Luzon Strait (19 degrees-22 degrees N) in the northern PS, while the other is southeast of Mindanao coast (4 degrees-7 degrees N) in the southern PS. In the two near-coast boxes where semiannual harmonic amplitude exceeds 4 cm, the northern box (127 degrees-133 degrees E, 19 degrees-22 degrees N) and the southern box (127 degrees-133 degrees E, 4 degrees-7 degrees N), semiannual changes contribute considerably to the total annual SSH variance by 12% and 17%, respectively. Despite prominent SSH variability, the bifurcation latitude of the North Equatorial Current (NBL) exhibits weak fluctuations with a peak-to-peak difference of only 0.3 degrees on semiannual time scale. While the in-phase annual SSH variations between the two boxes work together to enhance annual NBL changes, their out-of-phase semiannual SSH variations offset each other in driving the NBL displacements. Further analysis with a 1 1/2-layer reduced-gravity model forced by ECMWF wind stress reveals that the observed semiannual SSH variations are primarily driven by local wind forcing in the far western Pacific. Rossby wave signals propagating from the eastern/central Pacific contribute much less due to along-path dispersion and cancellation. Semiannual signals of wind field in the northern PS reflect mainly the semiannual changes of the Asian Monsoon system, while those in the southern PS arise from the combined effects of Monsoon transition and the annual migration of the intertropical convergence zone (ITCZ). (c) 2012 Elsevier Ltd. All rights reserved. |
| 学科主题 | Oceanography |
| 收录类别 | SCI |
| 原文出处 | 10.1016/j.dsr.2012.07.001 |
| 语种 | 英语 |
| WOS记录号 | WOS:000309790800009 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/12187]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Jun,Li, Yuanlong,Wang, Fan,et al. Spatial-temporal patterns and driving mechanisms of semiannual variations in the Philippine Sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2012,68:105-115. |
| APA | Zhao, Jun,Li, Yuanlong,Wang, Fan,Zhai, Fangguo,&Yu, Xiaolin.(2012).Spatial-temporal patterns and driving mechanisms of semiannual variations in the Philippine Sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,68,105-115. |
| MLA | Zhao, Jun,et al."Spatial-temporal patterns and driving mechanisms of semiannual variations in the Philippine Sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 68(2012):105-115. |
入库方式： OAI收割
来源：海洋研究所
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