High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust
We present our latest high-resolution lunar gravity field model of degree and order 1200 in spherical harmonics using Gravity Recovery and Interior Laboratory (GRAIL) data. In addition to a model with the standard spectral Kaula regularization constraint, we determine models by applying a constraint...
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2019
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ftdatacite:10.13016/m2f2px-wwbb 2023-05-15T18:22:59+02:00 High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust Goossens, S. Sabaka, T. J. Wieczorek, M. A. Neumann, G. A. Mazarico, E. Lemoine, F. G. Nicholas, J. B. Smith, D. E. Zuber, M. T. 2019 https://dx.doi.org/10.13016/m2f2px-wwbb http://mdsoar.org/handle/11603/17554 en eng American Geophysical Union ©2018. American Geophysical Union.All Rights Reserved. Access to this item will begin on 2020-05-06 This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. CreativeWork article 2019 ftdatacite https://doi.org/10.13016/m2f2px-wwbb 2021-11-05T12:55:41Z We present our latest high-resolution lunar gravity field model of degree and order 1200 in spherical harmonics using Gravity Recovery and Interior Laboratory (GRAIL) data. In addition to a model with the standard spectral Kaula regularization constraint, we determine models by applying a constraint based on topography called rank-minus-one (RM1). The new models using this RM1 constraint have high correlations with topography over the entire degree range by design. The RM1 models allow the determination of apparent crustal densities at all spatial scales (called effective density) covered by the model, whereas the Kaula-constrained model can only be used globally up to spherical harmonic degree 700. We find that the effective density spectrum has a smaller slope for the high degrees when compared to the medium degrees. We interpret this as indicative of a global average surface density, as opposed to an ever-decreasing effective density as one approaches the surface. We use the RM1 models to derive maps of lateral and vertical density variations in the lunar crust. These models allow us to increase the resolution of this analysis compared to previous studies, by increasing the degree range over which to fit theoretical models of vertical density variations, and by decreasing the size of the spherical caps used in a localized analysis. Several regions on the Moon, such as South Pole-Aitken and Mare Orientale, are distinct from their surroundings in terms of surface densities. The RM1 models are especially valuable in (localized) spectral studies of the structure of the lunar crust. Article in Journal/Newspaper South pole DataCite Metadata Store (German National Library of Science and Technology) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) South Pole |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
We present our latest high-resolution lunar gravity field model of degree and order 1200 in spherical harmonics using Gravity Recovery and Interior Laboratory (GRAIL) data. In addition to a model with the standard spectral Kaula regularization constraint, we determine models by applying a constraint based on topography called rank-minus-one (RM1). The new models using this RM1 constraint have high correlations with topography over the entire degree range by design. The RM1 models allow the determination of apparent crustal densities at all spatial scales (called effective density) covered by the model, whereas the Kaula-constrained model can only be used globally up to spherical harmonic degree 700. We find that the effective density spectrum has a smaller slope for the high degrees when compared to the medium degrees. We interpret this as indicative of a global average surface density, as opposed to an ever-decreasing effective density as one approaches the surface. We use the RM1 models to derive maps of lateral and vertical density variations in the lunar crust. These models allow us to increase the resolution of this analysis compared to previous studies, by increasing the degree range over which to fit theoretical models of vertical density variations, and by decreasing the size of the spherical caps used in a localized analysis. Several regions on the Moon, such as South Pole-Aitken and Mare Orientale, are distinct from their surroundings in terms of surface densities. The RM1 models are especially valuable in (localized) spectral studies of the structure of the lunar crust. |
format |
Article in Journal/Newspaper |
author |
Goossens, S. Sabaka, T. J. Wieczorek, M. A. Neumann, G. A. Mazarico, E. Lemoine, F. G. Nicholas, J. B. Smith, D. E. Zuber, M. T. |
spellingShingle |
Goossens, S. Sabaka, T. J. Wieczorek, M. A. Neumann, G. A. Mazarico, E. Lemoine, F. G. Nicholas, J. B. Smith, D. E. Zuber, M. T. High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
author_facet |
Goossens, S. Sabaka, T. J. Wieczorek, M. A. Neumann, G. A. Mazarico, E. Lemoine, F. G. Nicholas, J. B. Smith, D. E. Zuber, M. T. |
author_sort |
Goossens, S. |
title |
High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
title_short |
High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
title_full |
High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
title_fullStr |
High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
title_full_unstemmed |
High-Resolution Gravity Field Models from GRAIL Dataand Implications for Models of the DensityStructure of the Moon's Crust |
title_sort |
high-resolution gravity field models from grail dataand implications for models of the densitystructure of the moon's crust |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://dx.doi.org/10.13016/m2f2px-wwbb http://mdsoar.org/handle/11603/17554 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken South Pole |
geographic_facet |
Aitken South Pole |
genre |
South pole |
genre_facet |
South pole |
op_rights |
©2018. American Geophysical Union.All Rights Reserved. Access to this item will begin on 2020-05-06 This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. |
op_doi |
https://doi.org/10.13016/m2f2px-wwbb |
_version_ |
1766202408258502656 |