GRACE—Gravity Data for Understanding the Deep Earth’s Interior
While the main causes of the temporal gravity variations observed by the Gravity Recovery and Climate Experiment (GRACE) space mission result from water mass redistributions occurring at the surface of the Earth in response to climatic and anthropogenic forces (e.g., changes in land hydrology, ocean...
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doaj-724abc9bd7de40768e0d40a2cc01d2752020-12-22T00:03:15ZengMDPI AGRemote Sensing2072-42922020-12-01124186418610.3390/rs12244186GRACE—Gravity Data for Understanding the Deep Earth’s InteriorMioara Mandea0Véronique Dehant1Anny Cazenave2CNES—Centre National d’Etudes Spatiales, 75039 Paris, FranceRoyal Observatory of Belgium, 1180 Brussels, BelgiumLEGOS—Laboratoire d’Études en Géophysique et Océanographie Spatiales, Observatoire Midi-Pyrénées, 31400 Toulouse, FranceWhile the main causes of the temporal gravity variations observed by the Gravity Recovery and Climate Experiment (GRACE) space mission result from water mass redistributions occurring at the surface of the Earth in response to climatic and anthropogenic forces (e.g., changes in land hydrology, ocean mass, and mass of glaciers and ice sheets), solid Earth’s mass redistributions were also recorded by these observations. This is the case, in particular, for the glacial isostatic adjustment (GIA) or the viscous response of the mantle to the last deglaciation. However, it has only recently been shown that the gravity data also contain the signature of flows inside the outer core and their effects on the core–mantle boundary (CMB). Detecting deep Earth’s processes in GRACE observations offers an exciting opportunity to provide additional insight into the dynamics of the core–mantle interface. Here, we present one aspect of the GRACEFUL (GRavimetry, mAgnetism and CorE Flow) project, i.e., the possibility to use gravity field data for understanding the dynamic processes inside the fluid core and core–mantle boundary of the Earth, beside that offered by the geomagnetic field variations.https://www.mdpi.com/2072-4292/12/24/4186GRACE satellitegravity fieldmagnetic fieldcore–mantle boundary |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mioara Mandea Véronique Dehant Anny Cazenave |
spellingShingle |
Mioara Mandea Véronique Dehant Anny Cazenave GRACE—Gravity Data for Understanding the Deep Earth’s Interior Remote Sensing GRACE satellite gravity field magnetic field core–mantle boundary |
author_facet |
Mioara Mandea Véronique Dehant Anny Cazenave |
author_sort |
Mioara Mandea |
title |
GRACE—Gravity Data for Understanding the Deep Earth’s Interior |
title_short |
GRACE—Gravity Data for Understanding the Deep Earth’s Interior |
title_full |
GRACE—Gravity Data for Understanding the Deep Earth’s Interior |
title_fullStr |
GRACE—Gravity Data for Understanding the Deep Earth’s Interior |
title_full_unstemmed |
GRACE—Gravity Data for Understanding the Deep Earth’s Interior |
title_sort |
grace—gravity data for understanding the deep earth’s interior |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2020-12-01 |
description |
While the main causes of the temporal gravity variations observed by the Gravity Recovery and Climate Experiment (GRACE) space mission result from water mass redistributions occurring at the surface of the Earth in response to climatic and anthropogenic forces (e.g., changes in land hydrology, ocean mass, and mass of glaciers and ice sheets), solid Earth’s mass redistributions were also recorded by these observations. This is the case, in particular, for the glacial isostatic adjustment (GIA) or the viscous response of the mantle to the last deglaciation. However, it has only recently been shown that the gravity data also contain the signature of flows inside the outer core and their effects on the core–mantle boundary (CMB). Detecting deep Earth’s processes in GRACE observations offers an exciting opportunity to provide additional insight into the dynamics of the core–mantle interface. Here, we present one aspect of the GRACEFUL (GRavimetry, mAgnetism and CorE Flow) project, i.e., the possibility to use gravity field data for understanding the dynamic processes inside the fluid core and core–mantle boundary of the Earth, beside that offered by the geomagnetic field variations. |
topic |
GRACE satellite gravity field magnetic field core–mantle boundary |
url |
https://www.mdpi.com/2072-4292/12/24/4186 |
work_keys_str_mv |
AT mioaramandea gracegravitydataforunderstandingthedeepearthsinterior AT veroniquedehant gracegravitydataforunderstandingthedeepearthsinterior AT annycazenave gracegravitydataforunderstandingthedeepearthsinterior |
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