摘要
利用潮汐模型NAO.99Jb和FES2014确定了山东邻海的深度基准面模型并对其精度进行了评估,结果表明,NAO.99Jb模型确定的深度基准值L10的中误差为23.28 cm,FES2014模型确定的深度基准值L13的中误差为34.37 cm,长周期分潮的相对误差过大导致加入长周期分潮改正项后深度基准值中误差分别增大了11.04 cm和12.38 cm,较其他分潮对深度基准值精度的影响更明显,所以基于潮汐模型构建深度基准面模型时,长周期分潮部分必须加入实测数据改正。进一步采用山东邻海13个长期验潮站实测数据,定量地分析了长周期分潮对深度基准面确定的影响,结果表明,长周期分潮改正项的量值介于13.89~22.39 cm,平均改正值为18.03 cm,在深度基准值中占比达到15.15%。因此,长周期分潮改正对深度基准面的精确确定研究贡献较大,准确的长周期分潮模型是构建高精度深度基准面模型的基础。
The depth datum constructed by the NAO.99Jb and FES2014 ocean tidal models was evaluated in Shandong coastal areas.Due to the relative correction errors of partial tidal constituents introduced by these two models are enormous,the mean square errors of L10 and L13 constructed by NAO.99Jb and FES2014 are 23.28 cm and 34.37 cm,respectively.After the long-period tide correction,the depth datum errors were increased by 11.04 cm and 12.38 cm,respectively,which played a more obvious influence on the accuracy of depth datum than other tidal components.Thus,the long-term tidal measured data must be considered to correct the long period tidal constituents when using the ocean tide model to construct the depth datum model.The influence of long period tidal constituents on determining depth datum was analyzed quantitatively by using the measured data from 13 long-term tidal gauge stations in Shandong coastal areas.The results showed that the correction magnitude of the long-period tidal constituents is between 13.89 cm and 22.39 cm(the average value is 18.03 cm),accounting for 15.15%in the depth datum value.Therefore,the long period tidal constituents cannot be neglected in determining depth datum,and the accurate long period tidal constituent model was the foundation for building the high-precision depth datum model.
作者
孙彦菲
周兴华
付延光
孙维康
SUN Yan-fei;ZHOU Xing-hua;FU Yan-guang;SUN Wei-kang(College of Geodesy Geomatics, Shandong University of Science and Technology, Qingdao 266590, China;First Institute of Oceanography, MNR, Qingdao 266061, China)
出处
《海洋科学进展》
CAS
CSCD
北大核心
2021年第2期304-311,共8页
Advances in Marine Science
基金
国家自然科学基金项目——基于GNSS长期验潮站与卫星测高联合观测的中国沿海绝对海平面变化研究(41706115)
山东省自然科学基金项目——联合验潮站、卫星测高与潮汐数值模拟的山东海域陆海垂直基准构建研究(ZR201911050125)。
关键词
山东邻海
深度基准面
长周期分潮改正
潮汐模型
验潮站
Shandong coastal areas
depth datum
long period partial tide correction
tidal model
tide gauge station
