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Table 3 Correlation coefficient/relative standard deviation (RSD) between GRACE and satellite altimetry solutions for Antarctic polar motion excitation functions and results from the combined gravity field solution LDCmgm90. The best results for the entire AIS can be maintained through summation of the weighted adjusted GRACE and altimetry solutions for the subregions APIS, WAIS and EAIS. The best individual and combined results are highlighted by bold values

From: The influence of Antarctic ice loss on polar motion: an assessment based on GRACE and multi-mission satellite altimetry

 

\(\chi _1^{AIS}\)

\(\chi _1^{APIS}\)

\(\chi _1^{WAIS}\)

\(\chi _1^{EAIS}\)

\(\chi _2^{AIS}\)

\(\chi _2^{APIS}\)

\(\chi _2^{WAIS}\)

\(\chi _2^{EAIS}\)

ITSG-Grace2018/TUM

0.99/ 5%

0.89/17%

0.99/ 3%

0.99/ 5%

0.99/ 6%

0.92/16%

0.99/ 5%

0.89/20%

ITSG-Grace2018/TUD

0.99/ 2%

0.63/27%

0.98/ 3%

0.99/ 3%

0.98/ 4%

0.74/29%

0.99/ 2%

0.83/18%

CSR RL06M

0.99/ 6%

0.84/31%

0.99/ 10%

0.98/ 6%

0.99/ 8%

0.88/29%

0.99/ 8%

0.91/14%

JPL RL06M

0.99/ 6%

0.85/43%

0.99/ 6%

0.98/12%

0.98/ 5%

0.90/37%

0.99/ 3%

0.86/17%

altimetry (TUD)

0.97/ 4%

0.51/27%

0.98/ 3%

0.94/8%

0.96/11%

0.60/24%

0.99/ 4%

0.79/60%

altimetry (UL)

0.89/17%

0.58/17%

0.92/ 6%

0.83/26%

0.91/13%

0.68/15%

0.96/ 4%

0.55/55%

Mean gravimetry

1.00/ 4%

0.91/21%

0.99/ 5%

1.00/ 6%

0.99/ 6%

0.94/19%

0.99/ 4%

0.90/15%

Mean altimetry

0.97/10%

0.59/21%

0.97/ 4%

0.95/16%

0.95/12%

0.68/18%

0.99/ 2%

0.71/56%

Mean grav./alti.

1.00/ 1%

0.86/ 10%

0.99/ 3%

0.99/ 3%

0.99/ 2%

0.89/10%

0.99/ 3%

0.88/26%

Adjusted grav./alti.

0.99/ 2%

0.85/ 11%

0.99/ 3%

0.99/ 2%

0.99/ 4%

0.89/11%

0.99/ 3%

0.90/19%

 

1.00/ 2%

\(\leftarrow \,\chi _1^{APIS}+\chi _1^{WAIS}+\chi _1^{EAIS}\)

0.99/ 2%

\(\leftarrow \,\chi _2^{APIS}+\chi _2^{WAIS}+\chi _2^{EAIS}\)