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Earth, Planets and Space

Table 5 Standard deviation (STD) of non-seasonal time series of GAO, GRACE-based HAM/CAM (GSM, TWS, MAS land, and MAS global) and SLR-based HAM/CAM, errors of STD (STDerr), correlation coefficients (Corr) between HAM/CAM and GAO, percentage of variance in GAO explained by HAM/CAM (Varexp), root mean square error (RMSD) of HAM/CAM

From: Evaluation of hydrological and cryospheric angular momentum estimates based on GRACE, GRACE-FO and SLR data for their contributions to polar motion excitation

 

STD (mas)

STDerr (%)

Corr

Varexp (%)

RMSD (mas)

χ1

χ2

χ1

χ2

χ1

χ2

χ1

χ2

χ1

χ2

GAO

6.92

11.54

–

–

–

–

–

–

–

–

GSM

7.33

7.19

6

− 38

0.46

0.52

 − 15

26

7.39

9.88

TWS

3.39

6.49

− 51

− 44

0.54

0.66

29

43

5.80

8.70

MAS land

3.47

6.88

− 50

− 40

0.50

0.66

25

43

5.99

8.65

MAS global

7.20

12.22

4

6

0.64

0.83

25

64

5.98

6.90

SLR

6.14

7.88

− 24

− 32

0.56

0.62

21

38

6.14

9.09

  1. Note that for non-seasonal variations, the critical value of correlation coefficient for 36 independent points and a 95% confidence level is 0.28, while the standard error of the difference between two correlation coefficients is 0.25
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