| 摘要: |
| 为研究海洋环境信号在OBS原始数据中的规律及应用，根据OBS原始数据的波形及频谱特征将研究区划分为5个时间段，依次为旧涌浪阶段、风浪渐强阶段、风浪全盛阶段、风浪消退阶段和新涌浪阶段。结合海洋天气预报，认为上述现象是由偏南风风浪对海流的影响造成的。参考采集班报计算各阶段的时长和距离，计算了风浪渐强、全盛和消退阶段OBS附近海流的平均速度。结果表明：OBS原始资料中浅海海洋环境噪音增强的主要因素是风浪，且风浪引起的噪音信号其波形变化特征是渐进式的；OBS可用于接收某种特殊阶段（如台风、海啸等）的噪音信号，并根据噪音信号的波形特征、频谱变化规律和持续时间估算该阶段的海流速度变化。 |
| 关键词: 海洋环境信号 OBS 海浪实测 |
| DOI： |
| 分类号:P731;P732.2;P733.22;P738 |
| 基金项目:国家自然科学基金重点项目(No.41230318和No.41240005). |
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| Analysis and Application of Ocean Ambient Signal Based on OBS |
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Tong Siyou,Liao Yi,Chen Liang and Wu Zhiqiang
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Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China;China;;CNOOC Ltd_Zhanjiang;China;;Qingdao Institute of Marine Geology;China,Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Qingdao Institute of Marine Geology
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| Abstract: |
| In order to investigate the regularity and application of ocean ambient signal in OBS, the analysis area is divided into the old swell stage, wind wave coming stage, wind wave stage, wind wave leaving stage and new swell stage based on the waveform and spectrum characteristics of OBS. In consideration of marine forecast, the above phenomenon is thought to be due to the effects caused by southeast wind wave on the seabed current. On the basis of different stages of duration time and extended length are calculated by the field seismic acquisition report, average velocity of ocean current around OBS in the seafloor could be calculated. The research results show that the main factor of ocean ambient noise enhancement is the wind wave and the characteristics of waveform is gradual. OBS can monitor ocean current of a special stage in the form of seabed observation, and estimate the current velocity based on the waveform, spectrum characteristics and duration of the special stage. |
| Key words: ocean ambient noise OBS ocean current monitor |