Articles | Volume 44, issue 1
https://doi.org/10.5194/angeo-44-287-2026
https://doi.org/10.5194/angeo-44-287-2026
Regular paper
 | 
23 Apr 2026
Regular paper |  | 23 Apr 2026

Effect of a non-hydrostatic core-mantle boundary on the nutations and Length-of-day of Mars

Marta Folgueira López, Véronique Dehant, Mihaela Puica, and Tim Van Hoolst

Related authors

Geocenter sensitivity from satellite tracking
Graciela López Rosson, Véronique Dehant, and Marta Folgueira
EGUsphere, https://doi.org/10.5194/egusphere-2026-6215,https://doi.org/10.5194/egusphere-2026-6215, 2026
This preprint is open for discussion and under review for Solid Earth (SE).
Short summary
Basic Earth Parameters from VLBI observations using Bayesian inversions in the time domain: updated insights of the Earth's interior
Yuting Cheng, Véronique Dehant, Attilio Rivoldini, Jérémy Rekier, and Christian Bizouard
Solid Earth, 17, 789–801, https://doi.org/10.5194/se-17-789-2026,https://doi.org/10.5194/se-17-789-2026, 2026
Short summary
The six-year cycle in atmospheric angular momentum: robustness, zonal-wind structure, and implications for Earth rotation
Julia Pfeffer, Anny Cazenave, Rodrigo Abarca-del-Rio, Veronique Dehant, Mioara Mandea, Severine Rosat, and Nicolas Gillet
EGUsphere, https://doi.org/10.5194/egusphere-2026-82,https://doi.org/10.5194/egusphere-2026-82, 2026
Short summary
ESD Ideas: A 6-year oscillation in the whole Earth system?
Anny Cazenave, Julia Pfeffer, Mioara Mandea, and Veronique Dehant
Earth Syst. Dynam., 14, 733–735, https://doi.org/10.5194/esd-14-733-2023,https://doi.org/10.5194/esd-14-733-2023, 2023
Short summary

Cited articles

Baland, R. M., Yseboodt, M., Le Maistre, S., Rivoldini, A., Van Hoolst, T., and Dehant, V.: The precession and nutations of a rigid Mars, Celest. Mech. Dyn. Astr., 132, 47, https://doi.org/10.1007/s10569-020-09986-0, 2020. 
Broquet, A., Plesa, A.-C., Klemann, V., Root, B. C., Genova, A., Wieczorek, M. A., Knapmeyer, M., Andrews-Hanna, J. C., and Breuer, D.: Glacial isostatic adjustment reveals Mars's interior viscosity structure, Nature, 639, 109–113, https://doi.org/10.1038/s41586-024-08565-9, 2025. 
Buffett, B. A., Mathews, P. M., and Herring, T. A.: Modeling of nutation and precession: Effects of electromagnetic coupling, J. Geophys. Res., 107, https://doi.org/10.1029/2000JB000056, 2002. 
Charalambous, C., Pike, W. T., Kim, D., Samuel, H., Fernando, B., Bill, C., and Lognonné, P.: Seismic evidence for a highly heterogeneous Martian mantle, Science, 389, 899–903, https://doi.org/10.1126/science.adk4292, 2025. 
Download
Short summary
Mantle mass anomalies can deform Mars’ core–mantle boundary (CMB). Unlike Earth’s mainly degree 2–order 2 pattern, Mars’ Tharsis and crustal dichotomy cause multiple deformation types. Here, researchers studied how dynamic CMB topography affects Mars’ nutations and length-of-day (LOD). They found the main (though tiny) effect on nutations comes from degree 2–order 2, while LOD changes are too small to detect.
Share