Temperature beneath continents as a function of continental cover and convective wavelength
International audience Geodynamic modeling studies have demonstrated that mantle global warming can occur in response to continental aggregation, possibly leading to large-scale melting and associated continental breakup. Such feedback calls for a recipe describing how continents help to regulate th...
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ftunivlyon1:oai:HAL:hal-00687078v1 2024-05-19T07:32:14+00:00 Temperature beneath continents as a function of continental cover and convective wavelength Philipps, Benjamin R. Coltice, Nicolas Earth and Environmental Sciences Division Los Alamos Los Alamos National Laboratory (LANL) Laboratoire de Sciences de la Terre (LST) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Los Alamos National Laboratory National Science Foundation 2010 https://hal.science/hal-00687078 https://hal.science/hal-00687078/document https://hal.science/hal-00687078/file/2009JB006600.pdf https://doi.org/10.1029/2009JB006600 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JB006600 hal-00687078 https://hal.science/hal-00687078 https://hal.science/hal-00687078/document https://hal.science/hal-00687078/file/2009JB006600.pdf doi:10.1029/2009JB006600 info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-00687078 Journal of Geophysical Research : Solid Earth, 2010, 115 (B04408), 13 p. ⟨10.1029/2009JB006600⟩ MANTLE CONVECTION HEAT-FLOW SUPERCONTINENT CYCLES DEPENDENT VISCOSITY THERMAL-CONVECTION RAYLEIGH NUMBER PLATE MOTIONS POLAR WANDER DEEP MANTLE MODELS [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2010 ftunivlyon1 https://doi.org/10.1029/2009JB006600 2024-05-02T00:44:22Z International audience Geodynamic modeling studies have demonstrated that mantle global warming can occur in response to continental aggregation, possibly leading to large-scale melting and associated continental breakup. Such feedback calls for a recipe describing how continents help to regulate the thermal evolution of the mantle. Here we use spherical mantle convection models with continents to quantify variations in subcontinental temperature as a function of continent size and distribution and convective wavelength. Through comparison to a simple analytical boundary layer model, we show that larger continents beget warming of the underlying mantle, with heating sometimes compounded by the formation of broader convection cells associated with the biggest continents. Our results hold well for purely internally heated and partially core heated models with Rayleigh numbers of 10(5) to 10(7) containing continents with sizes ranging from that of Antarctica to Pangea. Results from a time-dependent model with three mobile continents of various sizes suggests that the tendency for temperatures to rise with continent size persists on average over timescales of billions of years. Article in Journal/Newspaper Antarc* Antarctica HAL Lyon 1 (University Claude Bernard Lyon 1) Journal of Geophysical Research 115 B4 |
institution |
Open Polar |
collection |
HAL Lyon 1 (University Claude Bernard Lyon 1) |
op_collection_id |
ftunivlyon1 |
language |
English |
topic |
MANTLE CONVECTION HEAT-FLOW SUPERCONTINENT CYCLES DEPENDENT VISCOSITY THERMAL-CONVECTION RAYLEIGH NUMBER PLATE MOTIONS POLAR WANDER DEEP MANTLE MODELS [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
MANTLE CONVECTION HEAT-FLOW SUPERCONTINENT CYCLES DEPENDENT VISCOSITY THERMAL-CONVECTION RAYLEIGH NUMBER PLATE MOTIONS POLAR WANDER DEEP MANTLE MODELS [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Philipps, Benjamin R. Coltice, Nicolas Temperature beneath continents as a function of continental cover and convective wavelength |
topic_facet |
MANTLE CONVECTION HEAT-FLOW SUPERCONTINENT CYCLES DEPENDENT VISCOSITY THERMAL-CONVECTION RAYLEIGH NUMBER PLATE MOTIONS POLAR WANDER DEEP MANTLE MODELS [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Geodynamic modeling studies have demonstrated that mantle global warming can occur in response to continental aggregation, possibly leading to large-scale melting and associated continental breakup. Such feedback calls for a recipe describing how continents help to regulate the thermal evolution of the mantle. Here we use spherical mantle convection models with continents to quantify variations in subcontinental temperature as a function of continent size and distribution and convective wavelength. Through comparison to a simple analytical boundary layer model, we show that larger continents beget warming of the underlying mantle, with heating sometimes compounded by the formation of broader convection cells associated with the biggest continents. Our results hold well for purely internally heated and partially core heated models with Rayleigh numbers of 10(5) to 10(7) containing continents with sizes ranging from that of Antarctica to Pangea. Results from a time-dependent model with three mobile continents of various sizes suggests that the tendency for temperatures to rise with continent size persists on average over timescales of billions of years. |
author2 |
Earth and Environmental Sciences Division Los Alamos Los Alamos National Laboratory (LANL) Laboratoire de Sciences de la Terre (LST) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Los Alamos National Laboratory National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Philipps, Benjamin R. Coltice, Nicolas |
author_facet |
Philipps, Benjamin R. Coltice, Nicolas |
author_sort |
Philipps, Benjamin R. |
title |
Temperature beneath continents as a function of continental cover and convective wavelength |
title_short |
Temperature beneath continents as a function of continental cover and convective wavelength |
title_full |
Temperature beneath continents as a function of continental cover and convective wavelength |
title_fullStr |
Temperature beneath continents as a function of continental cover and convective wavelength |
title_full_unstemmed |
Temperature beneath continents as a function of continental cover and convective wavelength |
title_sort |
temperature beneath continents as a function of continental cover and convective wavelength |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00687078 https://hal.science/hal-00687078/document https://hal.science/hal-00687078/file/2009JB006600.pdf https://doi.org/10.1029/2009JB006600 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://hal.science/hal-00687078 Journal of Geophysical Research : Solid Earth, 2010, 115 (B04408), 13 p. ⟨10.1029/2009JB006600⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JB006600 hal-00687078 https://hal.science/hal-00687078 https://hal.science/hal-00687078/document https://hal.science/hal-00687078/file/2009JB006600.pdf doi:10.1029/2009JB006600 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2009JB006600 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
B4 |
_version_ |
1799470218844569600 |