How large are present-day heat flux variations across the surface of Mars?
International audience The first in situ Martian heat flux measurement to be carried out by the InSight Discovery-class mission will provide an important baseline to constrain the present-day heat budget of the planet and, in turn, the thermochemical evolution of its interior. In this study, we esti...
Published in: | Journal of Geophysical Research: Planets |
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Online Access: | https://hal.science/hal-02458627 https://hal.science/hal-02458627/document https://hal.science/hal-02458627/file/Plesa%20et%20al.%202017.pdf https://doi.org/10.1002/2016JE005126 |
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ftinsu:oai:HAL:hal-02458627v1 2023-06-18T03:42:14+02:00 How large are present-day heat flux variations across the surface of Mars? Plesa, A.-C. Grott, M. Tosi, N. Breuer, D. Spohn, T. Wieczorek, M. German Aerospace Center (DLR) Technical University of Berlin / Technische Universität Berlin (TU) Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 2016 https://hal.science/hal-02458627 https://hal.science/hal-02458627/document https://hal.science/hal-02458627/file/Plesa%20et%20al.%202017.pdf https://doi.org/10.1002/2016JE005126 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2016JE005126 hal-02458627 https://hal.science/hal-02458627 https://hal.science/hal-02458627/document https://hal.science/hal-02458627/file/Plesa%20et%20al.%202017.pdf doi:10.1002/2016JE005126 info:eu-repo/semantics/OpenAccess ISSN: 2169-9097 EISSN: 2169-9100 Journal of Geophysical Research. Planets https://hal.science/hal-02458627 Journal of Geophysical Research. Planets, 2016, 121 (12), pp.2386-2403. ⟨10.1002/2016JE005126⟩ [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1002/2016JE005126 2023-06-05T22:55:57Z International audience The first in situ Martian heat flux measurement to be carried out by the InSight Discovery-class mission will provide an important baseline to constrain the present-day heat budget of the planet and, in turn, the thermochemical evolution of its interior. In this study, we estimate the magnitude of surface heat flux heterogeneities in order to assess how the heat flux at the InSight landing site relates to the average heat flux of Mars. To this end, we model the thermal evolution of Mars in a 3-D spherical geometry and investigate the resulting surface spatial variations of heat flux at the present day. Our models assume a fixed crust with a variable thickness as inferred from gravity and topography data and with radiogenic heat sources as obtained from gamma ray measurements of the surface. We test several mantle parameters and show that the present-day surface heat flux pattern is dominated by the imposed crustal structure. The largest surface heat flux peak-to peak variations lie between 17.2 and 49.9 mW m −2 , with the highest values being associated with the occurrence of prominent mantle plumes. However, strong spatial variations introduced by such plumes remain narrowly confined to a few geographical regions and are unlikely to bias the InSight heat flux measurement. We estimated that the average surface heat flux varies between 23.2 and 27.3 mW m −2 , while at the InSight location it lies between 18.8 and 24.2 mW m −2. In most models, elastic lithosphere thickness values exceed 250 km at the north pole, while the south pole values lie well above 110 km. Article in Journal/Newspaper North Pole South pole Institut national des sciences de l'Univers: HAL-INSU North Pole South Pole Journal of Geophysical Research: Planets 121 12 2386 2403 |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Plesa, A.-C. Grott, M. Tosi, N. Breuer, D. Spohn, T. Wieczorek, M. How large are present-day heat flux variations across the surface of Mars? |
topic_facet |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience The first in situ Martian heat flux measurement to be carried out by the InSight Discovery-class mission will provide an important baseline to constrain the present-day heat budget of the planet and, in turn, the thermochemical evolution of its interior. In this study, we estimate the magnitude of surface heat flux heterogeneities in order to assess how the heat flux at the InSight landing site relates to the average heat flux of Mars. To this end, we model the thermal evolution of Mars in a 3-D spherical geometry and investigate the resulting surface spatial variations of heat flux at the present day. Our models assume a fixed crust with a variable thickness as inferred from gravity and topography data and with radiogenic heat sources as obtained from gamma ray measurements of the surface. We test several mantle parameters and show that the present-day surface heat flux pattern is dominated by the imposed crustal structure. The largest surface heat flux peak-to peak variations lie between 17.2 and 49.9 mW m −2 , with the highest values being associated with the occurrence of prominent mantle plumes. However, strong spatial variations introduced by such plumes remain narrowly confined to a few geographical regions and are unlikely to bias the InSight heat flux measurement. We estimated that the average surface heat flux varies between 23.2 and 27.3 mW m −2 , while at the InSight location it lies between 18.8 and 24.2 mW m −2. In most models, elastic lithosphere thickness values exceed 250 km at the north pole, while the south pole values lie well above 110 km. |
author2 |
German Aerospace Center (DLR) Technical University of Berlin / Technische Universität Berlin (TU) Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
format |
Article in Journal/Newspaper |
author |
Plesa, A.-C. Grott, M. Tosi, N. Breuer, D. Spohn, T. Wieczorek, M. |
author_facet |
Plesa, A.-C. Grott, M. Tosi, N. Breuer, D. Spohn, T. Wieczorek, M. |
author_sort |
Plesa, A.-C. |
title |
How large are present-day heat flux variations across the surface of Mars? |
title_short |
How large are present-day heat flux variations across the surface of Mars? |
title_full |
How large are present-day heat flux variations across the surface of Mars? |
title_fullStr |
How large are present-day heat flux variations across the surface of Mars? |
title_full_unstemmed |
How large are present-day heat flux variations across the surface of Mars? |
title_sort |
how large are present-day heat flux variations across the surface of mars? |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02458627 https://hal.science/hal-02458627/document https://hal.science/hal-02458627/file/Plesa%20et%20al.%202017.pdf https://doi.org/10.1002/2016JE005126 |
geographic |
North Pole South Pole |
geographic_facet |
North Pole South Pole |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_source |
ISSN: 2169-9097 EISSN: 2169-9100 Journal of Geophysical Research. Planets https://hal.science/hal-02458627 Journal of Geophysical Research. Planets, 2016, 121 (12), pp.2386-2403. ⟨10.1002/2016JE005126⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016JE005126 hal-02458627 https://hal.science/hal-02458627 https://hal.science/hal-02458627/document https://hal.science/hal-02458627/file/Plesa%20et%20al.%202017.pdf doi:10.1002/2016JE005126 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2016JE005126 |
container_title |
Journal of Geophysical Research: Planets |
container_volume |
121 |
container_issue |
12 |
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2386 |
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2403 |
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