利用验潮站观测数据校正测高平均海平面变化线性漂移

针对卫星测高数据确定平均海平面变化速度中可能存在的线性漂移问题,利用全球快速验潮站观测数据,在进行精细数据预处理中,为保证两种数据观测含相同时变海平面信号,改进了同步校正方法,解决了每个验潮站参考基准不同导致验潮站上两种数据海平面变化差值无法进行全球平均的问题,并以T/P卫星观测数据为例,确定了其平均海平面变化线性漂移,为获取真实海平面变化速度提供了保证。

Calibration of the Linear Drift of Mean Sea Level Change from Satellite Altimetry Using Tide Gauge Observations

The rate of sea level change is one of the important indicators to measure global climate change.To the question that linear drift may exist in the rate of mean sea level change determined by satellite altimetry data,the rapid global tide gauge observations are used as reference to calibrate the linear drift.First,the data pre-processing in high quality is done to ensure satellite altimetry and tide gauge observe as far as possible the same sea level signal in the same location and time.Then,the calibration method is modified to solve the problem that the difference of sea level change between satellite altimetry and tide gauge in each tide gauge can't by average in the global for different reference datum.Taking T/P satellite measurement for example,the above process and method are realized,and the drift of mean sea level change is achieved,which can provide a guarantee to obtain the true rate of mean sea level change.