Abstract Observed polar motion after 2015 is dominated by the annual wobble, due to unprecedented amplitude reduction of the Chandler Wobble component. This change is likely due to suppression of the 433âdayâperiod free wobble by geophysical excitation sources. Our experiments show that excitation changes in the period 2011â2012 are the most significant contributors to the diminished Chandler Wobble after 2015. Numerical models and satellite observations suggest that the Chandler Wobble suppression was largely driven by the 2011â2012 changes in continentalâscale air and terrestrial water mass redistribution.
Observations from the Little Bunker
Last updated: February 28, 2026 12:22 PM
Atmospheric COâ
429.9 ppm
+17.3
ppm/year
Atmospheric CHâ
1946.47 ppb
+6.49
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year