| SU Hui,WEI Chunlei,JIANG Shaocai,LI Peiliang,ZHAI Fangguo. 2017. Revisiting the seasonal wave height variability in the South China Sea with merged satellite altimetry observations. Acta Oceanologica Sinica, 36(11):38－50 |
| Revisiting the seasonal wave height variability in the South China Sea with merged satellite altimetry observations |
| 基于多源融合卫星高度计观测数据的南海海浪有效波高的季节变化研究 |
| Received:March 22, 2016 Revised:August 25, 2016 |
| DOI：10.1007/s13131-017-1073-4 |
| Key words:significant wave height seasonal variability South China Sea satellite observations |
| 中文关键词: 有效波高 季节变化 南海 卫星观测 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | SU Hui | Central Marine Environmental Monitoring Station of Xiamen, East China Sea Branch, State Oceanic Administration, Xiamen 361008, China | | | WEI Chunlei | Beihai Marine Environmental Monitoring Center, South China Sea Branch, State Oceanic Administration, Beihai 536007, China | | | JIANG Shaocai | Beihai Marine Environmental Monitoring Center, South China Sea Branch, State Oceanic Administration, Beihai 536007, China | | | LI Peiliang | College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China | | | ZHAI Fangguo | College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China | gfzhai@ouc.edu.cn |
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| Abstract: |
| The seasonal variability of the significant wave height (SWH) in the South China Sea (SCS) is investigated using the most up-to-date gridded daily altimeter data for the period of September 2009 to August 2015. The results indicate that the SWH shows a uniform seasonal variation in the whole SCS, with its maxima occurring in December/January and minima in May. Throughout the year, the SWH in the SCS is the largest around Luzon Strait (LS) and then gradually decreases southward across the basin. The surface wind speed has a similar seasonal variation, but with different spatial distributions in most months of the year. Further analysis indicates that the observed SWH variations are dominated by swell. The wind sea height, however, is much smaller. It is the the largest in two regions southwest of Taiwan Island and southeast of Vietnam Coast during the northeasterly monsoon, while the largest in the central/southern SCS during the southwesterly monsoon. The extreme wave condition also experiences a significant seasonal variation. In most regions of the northern and central SCS, the maxima of the 99th percentile SWH that are larger than the SWH theoretically calculated with the wind speed for the fully developed seas mainly appear in August–November, closely related to strong tropical cyclone activities. Compared with previous studies, it is also implied that the wave climate in the Pacific Ocean plays an important role in the wave climate variations in the SCS. |
| 中文摘要: |
| 本论文利用2009年9月至2015年8月期间的格点化日平均卫星观测资料，研究了南海海浪有效波高的季节变化。结果显示整个南海的有效波高呈现一致的季节变化，其最大值发生在12月或者1月，最小值发生在5月。在全年12个月中，南海海浪有效波高均在吕宋海峡附近最大，并向南逐渐减小。南海海表面风也具有类似的季节变化，但是在大部分月份中其空间分布和有效波高的空间分布并不一致。进一步分析表明有效波高的变化主要是由涌浪主导，而相比而言风浪则非常小。在东北季风期间，风浪的最大值出现在台湾岛的西南海域和越南沿岸的东南海域；而在西南季风期间，风浪的最大值则出现在南海的中、南部。南海的极端波浪条件也存在显著地季节变化。在南海北部和中部的大部分区域，大于充分发展海浪有效波高理论值的1/100大波波高的极大值主要出现在8月-9月，这与南海及太平洋区域的强热带气旋活动密切相关。与前人工作相比，本论文研究成果也表明太平洋的海浪场对南海海浪场的时间变化具有重要影响。 |
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