## 3 Results
\begin{table}
\begin{tabular}{c c c c c} \hline \hline  & \multicolumn{3}{c}{**Trends of Mass Change Caused by Degree One Terms, \(C_{20}\)**} \\ \cline{3-5}
**2002.08–2016.07** & \multicolumn{2}{c}{**RL05**} & \multicolumn{2}{c}{**RL06 (SUN11 + TN11 + GRACE**} & \multicolumn{2}{c}{**RL06 (SUN14 + TN14 + GSFC)**} \\ \cline{3-5}  & & **(SUN11 + TN11 + GRACE** & \multicolumn{2}{c}{**C30**} \\ \cline{3-5}  & & **(SUN14 + TN14 + GSFC)** & **(SUN16 + TN14 + GSFC)** \\ \hline \multirow{4}{*}{GrIS} & CSR & \(-8.8\pm 0.4\) & \(-12.0\pm 0.4\) & \(-14.4\pm 0.4\) \\  & GFZ & \(-7.6\pm 0.4\) & \(-12.6\pm 0.4\) & \(-15.0\pm 0.4\) \\ \cline{1-1}  & JPL & \(-7.8\pm 0.4\) & \(-12.4\pm 0.4\) & \(-14.8\pm 0.4\) \\ \cline{1-1}  & Mean & \(-8.1\pm 0.7\) & \(-12.3\pm 0.7\) & \(-14.7\pm 0.7\) \\ \hline \multirow{4}{*}{AIS} & CSR & \(6.2\pm 2.0\) & \(19.0\pm 1.5\) & \(10.8\pm 1.5\) \\  & GFZ & \(-1.1\pm 1.7\) & \(21.2\pm 1.6\) & \(13.4\pm 1.6\) \\ \cline{1-1}  & JPL & \(-0.1\pm 1.7\) & \(20.9\pm 1.7\) & \(12.8\pm 1.7\) \\ \cline{1-1}  & Mean & \(1.7\pm 3.1\) & \(20.4\pm 2.8\) & \(12.3\pm 2.8\) \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The trends of mass change time series caused by the combination of degree one terms, SLR-based \(C_{20}\) and \(C_{30}\) estimates corresponding to GRACE RL05 and RL06 data over the GrIS and the AIS during the period from August 2002 to July 2016. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{3}{c}{**RL05**} & \multicolumn{3}{c}{**RL06**} \\ \cline{2-5}
**Mass Change Caused by C30** & \multicolumn{2}{c}{**Trend [G/yr]**} & \multicolumn{2}{c}{**Trend [G/yr]**} \\ \cline{3-5}  & \multicolumn{3}{c}{**GRACE**} & \multicolumn{2}{c}{**GRACE**} & \multicolumn{2}{c}{**GSFC**} \\ \cline{3-5}  & \multicolumn{3}{c}{**2002.08–**} & \multicolumn{1}{c}{**2012.03–**} & \multicolumn{1}{c}{**2002.08–**} & \multicolumn{1}{c}{**2012.03–**} & \multicolumn{1}{c}{**2012.03–**} \\  & \multicolumn{3}{c}{**2012.02**} & \multicolumn{1}{c}{**2016.07**} & \multicolumn{1}{c}{**2012.02**} & \multicolumn{1}{c}{**2016.07**} & \multicolumn{1}{c}{**2016.07**} \\ \hline \multirow{4}{*}{GrIS} & CSR & \(-2.6\pm 0.4\) & \(-2.2\pm 1.2\) & \(-1.1\pm 0.3\) & \(0.8\pm 1.2\) & \(3.3\pm 1.0\) \\  & GFZ & \(-1.4\pm 0.3\) & \(1.3\pm 1.0\) & \(-1.5\pm 0.3\) & \(1.8\pm 1.0\) & \(3.3\pm 1.0\) \\  & JPL & \(-1.9\pm 0.3\) & \(2.8\pm 1.1\) & \(-2.0\pm 0.3\) & \(2.4\pm 1.2\) & \(3.3\pm 1.0\) \\  & Mean & \(-\) & \(-1.5\pm 0.5\) & \(1.7\pm 2.0\) & \(3.3\pm 1.0\) \\ \hline \multirow{4}{*}{AIS} & CSR & \(16.8\pm 2.5\) & \(13.9\pm 7.8\) & \(7.0\pm 1.7\) & \(-4.8\pm 7.4\) & \(-21.1\pm 6.2\) \\  & GFZ & \(9.2\pm 1.9\) & \(-8.1\pm 6.6\) & \(9.6\pm 1.9\) & \(-11.5\pm 6.3\) & \(-21.1\pm 6.2\) \\ \cline{1-1}  & JPL & \(11.8\pm 1.8\) & \(-17.6\pm 7.2\) & \(12.5\pm 1.8\) & \(-15.5\pm 7.4\) & \(-21.1\pm 6.2\) \\ \cline{1-1}  & Mean & \(-\) & \(9.7\pm 3.1\) & \(-10.6\pm 12.2\) & \(-21.1\pm 6.2\) \\ \hline \hline \end{tabular}
\end{table} 
Table 4: The trends of mass change time series caused by \(C_{30}\) estimates separately from GRACE RL05/RL06 data and GSFC over the GrIS and the AIS during the period from August 2002 to February 2012, and the period from March 2012 to July 2016.