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Table 6. Inverse solution from observed gravitational zonal harmonic and secular polar motion rates
Solution 1:
• •
Using Space'93 X, Y
Total Inferred Rates
• contrib: Antarctic GSL
• contrib: Greenland GSL
• contrib:
PG R
• contrib: Mountain Glac
Ant
GSL:
mm/y
-0.87
Green
GSL:
mm/y
0.22
Low Mant
Vise:
Pa-sec (log)
23.7
WRMS=0.43
.
J 2
101l/y
jlL
10 1I
/y
j4
101l/y
X
.
y
mas/y
mas/y
-2.77
I 1.57
I 0.20
I 0.79
3.98
+0.25 +0.35 ±1.46
±1.0
+ 1.0
I -2.80
I 1.54
I 0.29 1.61
4.43
1
I -2.11
I -2.02
I 0.73 0.29
3.67
I
0.77
0.97 I 0.53
0.76
0.40
-2.07
1.84 I -1.27
0.36
-0.04
0.60
0.76
0.31
0.20
0.39
Solution 2:
I
-0.87
UsingJ~ast sqrs rate
X, Y
0.24 I 23.6
I
-2.77
I 1.57
I 0.20
I -0.45
5.61
+0.25 ±0.35 ±1.46
±1.0
+1.0
Total Inferred Rates
WRMS=1.05 1L-2.81
I 1.54
I 0.40 1.64
I_~.?~
IPCC (1995) Estimates
I
+ 1.4
I +0.4
See Figures 1a to 1d for least squares fit to IERS data; Space93: Gross--p993)
Key: Italics
= observed quantities; large font
= least squares estimated values; normal font =
values inferred by using
solved for quantities to predict constituent secular rates