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InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars

Observations of the South Polar Residual Cap suggest a possible erosion of the cap, leading to an increase of the global mass of the atmosphere. We test this assumption by making the first comparison between Viking 1 and InSight surface pressure data, which were recorded 40 years apart. Such a compa...

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Autores principales: Lange, L., Forget, F., Banfield, D., Wolff, M., Spiga, A., Millour, E., Viúdez‐Moreiras, D., Bierjon, A., Piqueux, S., Newman, C., Pla‐García, J., Banerdt, W. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286347/
https://www.ncbi.nlm.nih.gov/pubmed/35865505
http://dx.doi.org/10.1029/2022JE007190
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author Lange, L.
Forget, F.
Banfield, D.
Wolff, M.
Spiga, A.
Millour, E.
Viúdez‐Moreiras, D.
Bierjon, A.
Piqueux, S.
Newman, C.
Pla‐García, J.
Banerdt, W. B.
author_facet Lange, L.
Forget, F.
Banfield, D.
Wolff, M.
Spiga, A.
Millour, E.
Viúdez‐Moreiras, D.
Bierjon, A.
Piqueux, S.
Newman, C.
Pla‐García, J.
Banerdt, W. B.
author_sort Lange, L.
collection PubMed
description Observations of the South Polar Residual Cap suggest a possible erosion of the cap, leading to an increase of the global mass of the atmosphere. We test this assumption by making the first comparison between Viking 1 and InSight surface pressure data, which were recorded 40 years apart. Such a comparison also allows us to determine changes in the dynamics of the seasonal ice caps between these two periods. To do so, we first had to recalibrate the InSight pressure data because of their unexpected sensitivity to the sensor temperature. Then, we had to design a procedure to compare distant pressure measurements. We propose two surface pressure interpolation methods at the local and global scale to do the comparison. The comparison of Viking and InSight seasonal surface pressure variations does not show changes larger than ±8 Pa in the CO(2) cycle. Such conclusions are supported by an analysis of Mars Science Laboratory (MSL) pressure data. Further comparisons with images of the south seasonal cap taken by the Viking 2 orbiter and MARCI camera do not display significant changes in the dynamics of this cap over a 40 year period. Only a possible larger extension of the North Cap after the global storm of MY 34 is observed, but the physical mechanisms behind this anomaly are not well determined. Finally, the first comparison of MSL and InSight pressure data suggests a pressure deficit at Gale crater during southern summer, possibly resulting from a large presence of dust suspended within the crater.
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spelling pubmed-92863472022-07-19 InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars Lange, L. Forget, F. Banfield, D. Wolff, M. Spiga, A. Millour, E. Viúdez‐Moreiras, D. Bierjon, A. Piqueux, S. Newman, C. Pla‐García, J. Banerdt, W. B. J Geophys Res Planets Research Article Observations of the South Polar Residual Cap suggest a possible erosion of the cap, leading to an increase of the global mass of the atmosphere. We test this assumption by making the first comparison between Viking 1 and InSight surface pressure data, which were recorded 40 years apart. Such a comparison also allows us to determine changes in the dynamics of the seasonal ice caps between these two periods. To do so, we first had to recalibrate the InSight pressure data because of their unexpected sensitivity to the sensor temperature. Then, we had to design a procedure to compare distant pressure measurements. We propose two surface pressure interpolation methods at the local and global scale to do the comparison. The comparison of Viking and InSight seasonal surface pressure variations does not show changes larger than ±8 Pa in the CO(2) cycle. Such conclusions are supported by an analysis of Mars Science Laboratory (MSL) pressure data. Further comparisons with images of the south seasonal cap taken by the Viking 2 orbiter and MARCI camera do not display significant changes in the dynamics of this cap over a 40 year period. Only a possible larger extension of the North Cap after the global storm of MY 34 is observed, but the physical mechanisms behind this anomaly are not well determined. Finally, the first comparison of MSL and InSight pressure data suggests a pressure deficit at Gale crater during southern summer, possibly resulting from a large presence of dust suspended within the crater. John Wiley and Sons Inc. 2022-05-23 2022-05 /pmc/articles/PMC9286347/ /pubmed/35865505 http://dx.doi.org/10.1029/2022JE007190 Text en © 2022 The Authors. https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Article
Lange, L.
Forget, F.
Banfield, D.
Wolff, M.
Spiga, A.
Millour, E.
Viúdez‐Moreiras, D.
Bierjon, A.
Piqueux, S.
Newman, C.
Pla‐García, J.
Banerdt, W. B.
InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title_full InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title_fullStr InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title_full_unstemmed InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title_short InSight Pressure Data Recalibration, and Its Application to the Study of Long‐Term Pressure Changes on Mars
title_sort insight pressure data recalibration, and its application to the study of long‐term pressure changes on mars
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286347/
https://www.ncbi.nlm.nih.gov/pubmed/35865505
http://dx.doi.org/10.1029/2022JE007190
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