| 摘要: |
| 走航式海洋多参数剖面测量系统(MVP)是一种集成程度和自动化程度都较高的海洋调查设备,能对多要素进行同时观测,获得高水平空间分辨率的数据资料。MVP由于温度和电导率传感器响应时间的不匹配,下放速度过快(峰值速度4m/s)而造成非常严重的盐度尖峰现象。本研究通过结合F法、GM法和Grose法提出的盐度尖峰订正方案,提出了一种新的方法Match conductivity and temperature response times法,对压力、温度和电导率传感器三者进行响应时间的匹配来减弱盐度尖峰。与SBE-9型CTD资料进行对比发现订正后的资料误差比订正前减小80%,与CTD盐度曲线互相关程度为0.917。对比35N断面修正前后的盐度资料发现订正后温盐跃层处出现的低盐区域消失,与CTD断面资料对比结果显示MVP资料比CTD资料在细结构上更具有优势。 |
| 关键词: MVP 盐度尖峰 MCT法 |
| DOI：10.11759/hykx20130823002 |
| 分类号:P716 |
| 基金项目:黄海冷水团的形成机制与演变过程研究(4116018) |
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| Analysis and research on salinity spiking of the moving vessel profiler (MVP) |
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REN Qiang,YU Fei,DIAO Xin-yuan,SI Guang-cheng and WEI Chuan-jie
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Institute of Oceanology,Chinese Academy of Sciences,Institute of Oceanology,Chinese Academy of Sciences,Institute of Oceanology,Chinese Academy of Sciences,Institute of Oceanology,Chinese Academy of Sciences,Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| The moving vessel profiler (MVP) is a kind of equipment for marine investigation with high integration and automation. Multiparameter can be observed simultaneously by it to obtain data with high spatial resolution. However, serious salinity spiking emerges for the response time of sensors do not match between temperature and conductivity and the speed of lowering MVP is too fast (peaking speed 4m/s). In this study, we propose a novel method, Match conductivity and temperature response times, to weaken the salinity spiking via matching the response time of pressure, temperature, and conductivity sensors on the basis of combining F, GM, and Grose methods. The results show that the error of data corrected by the novel method reduces 80% compared with the SBE-9 CTD data and the cross-correlation with CTD data is 0.917. In addition, the area of low salinity in halocline of 35 °N section disappears after correction. It reveals that MVP has advantages in fine structure over CTD. |
| Key words: MVP salinity spiking MCT method |
