Fig. 5From: Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field modelsDifferences of the equatorial effective angular momentum functions \(\chi _1^{{\rm mass}}\) and \(\chi _2^{{\rm mass}}\) from GRACE RL05 (blue) and RL06 (red) data with respect to the mean excitation functionsBack to article page