Monthly mass-term sea level variations used for "A Novel Slepian Approach for Determining Mass-term Sea Level from GRACE over the South China Sea"

The dataset contains the monthly mass-term sea level variations in the South China Sea from 2005 to 2015. Five datasets were used to calculate the mass-term sea level variations: the GRACE Spherical Harmonics (noted SHC), the GRACE Mascon solutions (noted Mascon), the GRACE Slepian Function solutions (noted EST), ECCO Ocean botton pressure model (noted ECCO), and steric-corrected satellite altimetry dataset (noted AsS). Besides, the signal (with trend, seasonal and semi-seasonal information) and the residual mass-term sea level was given separately. 

The boundary of the South China Sea and the longtidue and latitude of the study area were also given.  Please noted that the longitude and latitude of the steric-corrected satellite altimetry dataset was different from the other four.

For further information about the Slepian function method, please refer to our released code:

https://github.com/KMartin0013/Slepian_ocean_add-on.git

If you use this dataset, please cite our work properly:

Zhongtian, Ma, Hok Sum Fok, Robert Tenzer, Jianli Chen. A Novel Slepian Approach for Determining Mass-term Sea Level from GRACE over the South China Sea. Int. J. Appl. Earth. Obs. Geoinf., 132, 104065, 2024. doi:https://doi.org/10.1016/j.jag.2024.104065

本数据集涵盖2005年至2015年南海逐月质量项海平面变化序列。本次计算质量项海平面变化共用到5类数据集：GRACE球谐系数解（Spherical Harmonics，下称SHC）、GRACE质量集中（Mascon）解、GRACE Slepian函数（Slepian Function）解（下称EST）、ECCO海底压力模型，以及比容校正（steric-corrected）卫星测高数据集（下称AsS）。此外，本数据集还分别提供了包含趋势项、季节项与半季节项的信号序列，以及残差质量项海平面变化。

本数据集同时提供了南海研究区域的边界范围，以及研究区的经纬度坐标。请注意：比容校正卫星测高数据集的经纬度范围与其余4类数据集存在差异。

若需了解Slepian函数方法的更多技术细节，请参考我们公开的代码仓库：https://github.com/KMartin0013/Slepian_ocean_add-on.git

若您使用本数据集，请按学术规范引用我们的研究成果：马中天、霍学森、罗伯特·滕泽尔、陈建利. 一种用于获取南海GRACE质量项海平面变化的新型Slepian方法. 国际应用地球观测与地理信息学报, 132, 104065, 2024. doi:https://doi.org/10.1016/j.jag.2024.104065