中国沿海不同海潮模型的倾斜负荷分析

Analysis of Tilt Loading with Different Ocean Tide Models in Coastal Areas of China

采用积分格林函数方法及6种全球海潮模型(CSR4.0,EOT11a,FES2004,GOT4.7,NAO99b和TPXO7.2)和中国近海潮汐资料,计算了我国沿海大地控制点上的海潮倾斜负荷效应。通过标准差、均方根RMS及和方根RSS等综合分析表明,海潮倾斜负荷普遍为10-8rad量级,最大达10-7rad量级。在中国沿海区域,各模型差异较大,应针对不同区域采用更适合本区的模型计算。

Using six global ocean tide models and China＇s regional tidal data,tilt ocean tidal loading is calculated by using the integral Green＇s function.Comprehensive analysis of the standard deviation,root mean square（RMS）,and root sum square（RSS）show that the tilt ocean tidal loading is generally10^-8rad,with a maximum up to 10^-7rad,in coastal areas of China.There is great difference among models.We need to exercise judgment to adopt one that is most suited for the specific area.