Observations of the South Polar Residual Cap counsel a doable erosion of the cap, resulting in a rise of the worldwide mass of the environment.
We check this assumption by making the primary comparability between Viking 1 and InSight floor stress information, which have been recorded 40 years aside. Such a comparability additionally permits us to find out adjustments within the dynamics of the seasonal ice caps between these two durations.
To take action, we first needed to recalibrate the InSight stress information due to their surprising sensitivity to the sensor temperature. Then, we needed to design a process to match distant stress measurements. We suggest two floor stress interpolation strategies on the native and international scale to do the comparability. The comparability of Viking and InSight seasonal floor stress variations doesn’t present adjustments bigger than +-8 Pa within the CO2 cycle. Such conclusions are supported by an evaluation of Mars Science Laboratory (MSL) stress information.
Additional comparisons with pictures of the south seasonal cap taken by the Viking 2 orbiter and MARCI digital camera don’t show important adjustments within the dynamics of this cover over a 40 12 months interval. Solely a doable bigger extension of the North Cap after the worldwide storm of MY 34 is noticed, however the bodily mechanisms behind this anomaly will not be effectively decided. Lastly, the primary comparability of MSL and InSight stress information suggests a stress deficit at Gale crater throughout southern summer time, probably ensuing from a big presence of mud suspended throughout the crater.
L. Lange, F. Neglect, D. Banfield, M. Wolff, A. Spiga, E. Millour, D. Viúdez-Moreiras, A. Bierjon, S. Piqueux, C. Newman, J. Pla-García, W. B. Banerdt
Topics: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Strategies for Astrophysics (astro-ph.IM)
Cite as: arXiv:2209.13412 [astro-ph.EP] (or arXiv:2209.13412v1 [astro-ph.EP] for this model)
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Journal reference: Journal of Geophysical Analysis (Planets), vol.127, pp.e07190 (2022)
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Submission historical past
From: Francois Neglect
[v1] Tue, 27 Sep 2022 14:12:51 UTC (41,130 KB)