日本海西南海域现场观测和卫星高度计获取的海面高度距平的比较研究

发布时间：2018-04-23 14:22

本文选题：海面高度距平 + 压力传感逆式回声仪(PIES)　；参考：《海洋科学》2016年02期

【摘要】：压力传感逆式回声仪(pressure-sensor-equipped inverted echo sounders,PIES)可以用来测量海底压力和声波从海底到海面的传播时间。海底压力和声波传播时间分别被用来估计水体质量变化(正压)和比容变化(斜压)对海面高度距平的贡献。对由PIES在日本海西南海域现场观测数据得到的海面高度距平(PIES SLA)与卫星高度计海面高度距平(Sat SLA)进行了比较研究。利用相关分析法,对PIES SLA和沿轨T/P卫星、沿轨ERS-2卫星测得的海面高度距平(TP SLA、ERS-2 SLA)进行了比较;对PIES SLA和AVISO网格化海面高度距平进行了比较,估计可能的误差来源,并分析PIES SLA正压部分和斜压部分对SLA的贡献。比较发现,PIES SLA和Sat SLA的相关系数较高,且均方根误差较小,并且对特定区域和特定站点产生误差可能的原因进行了进一步的探讨。通过研究,有以下结论:(1)相对于湾流和黑潮地区,这一区域正压部分对海面高度的贡献相对较大;(2)如果再考虑斜压变化对海面高度的贡献,PIES SLA和Sat SLA相关系数会有所提升;(3)在高能区PIES SLA和Sat SLA相关系数较高,符合得相对比较好。总的来说,在日本海地区,PIES SLA和Sat SLA相关系数较高,具有较高的一致性,能为我国海洋二号(HY-2)等卫星高度计的校验提供一种可靠的方式。该研究对于PIES的研发和设计以及对于PIES的布放位置的选择都有一定的借鉴意义。
[Abstract]:The pressure-sensor-equipped inverted echo sounders (PIESs) can be used to measure the pressure and the propagation time of sound waves from the sea floor to the sea surface. Seabed pressure and acoustic propagation time are used to estimate the contribution of water mass variation (barotropic pressure) and specific volume variation (baroclinic pressure) to sea height anomaly respectively. In this paper, the sea surface height anomaly obtained by PIES in the southwest sea area of Japan is compared with that of satellite altimeter sea surface height anomaly. Using correlation analysis method, the sea surface height anomaly TP SLAERS-2 obtained by PIES SLA and orbiting T / P satellite and ERS-2 satellite along orbit are compared, and the PIES SLA and AVISO grid sea surface height anomalies are compared to estimate the possible sources of errors. The contribution of barotropic and baroclinic parts of PIES SLA to SLA is analyzed. It is found that the correlation coefficients of Pies SLA and Sat SLA are higher and the root mean square error is small. The possible causes of errors in specific regions and stations are also discussed. From the study, there is the following conclusion: 1) relative to the Gulfstream and the Kuroshio region, If we consider the contribution of baroclinic variation to sea surface height, the correlation coefficients of Pies SLA and Sat SLA will be increased. The correlation coefficients of PIES SLA and Sat SLA are higher in high energy region. The match is relatively good. In general, the correlation coefficients of Pies SLA and Sat SLA are relatively high in the Sea of Japan area, which can provide a reliable way for the calibration of satellite altimeters such as HY-2. This research has some reference significance for the research and design of PIES and the choice of placement position of PIES.
【作者单位】：中国科学院海洋研究所;中国科学院大学;中国科学院海洋环流与波动重点实验室;青岛海洋科学与技术国家实验室海洋动力过程与气候功能实验室;
【基金】：中国科学院“百人计划”(Y32109101L);中国科学院方向项目(KZCX2-EW-209) 国家自然科学基金项目(41376028) 国家海洋局(全球变化与海气相互作用)及中国科学院知识创新项目(Y22114101Q)~~
【分类号】：P714

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