Fig. 4: Ocean signature in polar motion. | Communications Earth & Environment

Fig. 4: Ocean signature in polar motion.

From: Madden-Julian oscillation winds excite an intraseasonal see-saw of ocean mass that affects Earth’s polar motion

Fig. 4

a The plot of the time evolution of intraseasonal χ2 from International Earth Rotation and Reference Systems Service (IERS) observations (gray shaded), atmospheric angular momentum (green), and hydrological angular momentum (red) from ESMGFZ, residual of IERS observation after removing atmospheric and hydrological angular momentum from ESMGFZ (black), χ2 from control run (violet) and MC-EXP (cyan) during 2012–2013 boreal winter. b The plot of the time evolution of mass (dotted lines) and motion (solid lines) component of oceanic contribution to intraseasonal χ2 from control run (violet) and MC-EXP (cyan) during 2012–2013 boreal winter. Note the difference in scales in a and b.

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