Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models
Abstract The new Release-06 (RL06) Gravity Recovery and Climate Experiment (GRACE) gravity field solutions are evaluated by converting them into equatorial effective angular momentum functions (so-called excitation functions) for polar motion and comparing these to respective time series based on sp...
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ftdoajarticles:oai:doaj.org/article:8b38af8ae40941a19d6f713ea9186abd 2023-05-15T13:35:37+02:00 Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models Franziska Göttl Michael Schmidt Florian Seitz 2018-12-01T00:00:00Z https://doi.org/10.1186/s40623-018-0968-4 https://doaj.org/article/8b38af8ae40941a19d6f713ea9186abd EN eng SpringerOpen http://link.springer.com/article/10.1186/s40623-018-0968-4 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-018-0968-4 1880-5981 https://doaj.org/article/8b38af8ae40941a19d6f713ea9186abd Earth, Planets and Space, Vol 70, Iss 1, Pp 1-10 (2018) GRACE RL06 gravity field models Polar motion excitation Effective angular momentum functions Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.1186/s40623-018-0968-4 2022-12-30T21:52:03Z Abstract The new Release-06 (RL06) Gravity Recovery and Climate Experiment (GRACE) gravity field solutions are evaluated by converting them into equatorial effective angular momentum functions (so-called excitation functions) for polar motion and comparing these to respective time series based on space-geodetic observations (geodetic excitation). The same is performed for the older RL05 solutions using identical processing. Maps of equivalent water heights derived from both releases show that the signal-to-noise ratio is significantly improved in RL06. The derived polar motion excitation functions from RL05 and RL06 differ by about 15$$\%$$ % . An analysis of the contributions of different Earth subsystems revealed that the release update mainly influenced the hydrological (12$$\%$$ % ) and oceanic excitations (17$$\%$$ % ), but it has a relatively small impact on the cryospheric excitations related to Antarctica (4$$\%$$ % ) and Greenland (1$$\%$$ % ). The RL06 data from different GRACE processing centers are more consistent among each other than the previous RL05 data. Comparisons of the GRACE-based excitation functions with the geodetic and model-based oceanic excitations show that the latest release update improved the agreement by about 2 to 15 percentage points. Article in Journal/Newspaper Antarc* Antarctica Greenland Directory of Open Access Journals: DOAJ Articles Greenland Earth, Planets and Space 70 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
GRACE RL06 gravity field models Polar motion excitation Effective angular momentum functions Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
spellingShingle |
GRACE RL06 gravity field models Polar motion excitation Effective angular momentum functions Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 Franziska Göttl Michael Schmidt Florian Seitz Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
topic_facet |
GRACE RL06 gravity field models Polar motion excitation Effective angular momentum functions Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
description |
Abstract The new Release-06 (RL06) Gravity Recovery and Climate Experiment (GRACE) gravity field solutions are evaluated by converting them into equatorial effective angular momentum functions (so-called excitation functions) for polar motion and comparing these to respective time series based on space-geodetic observations (geodetic excitation). The same is performed for the older RL05 solutions using identical processing. Maps of equivalent water heights derived from both releases show that the signal-to-noise ratio is significantly improved in RL06. The derived polar motion excitation functions from RL05 and RL06 differ by about 15$$\%$$ % . An analysis of the contributions of different Earth subsystems revealed that the release update mainly influenced the hydrological (12$$\%$$ % ) and oceanic excitations (17$$\%$$ % ), but it has a relatively small impact on the cryospheric excitations related to Antarctica (4$$\%$$ % ) and Greenland (1$$\%$$ % ). The RL06 data from different GRACE processing centers are more consistent among each other than the previous RL05 data. Comparisons of the GRACE-based excitation functions with the geodetic and model-based oceanic excitations show that the latest release update improved the agreement by about 2 to 15 percentage points. |
format |
Article in Journal/Newspaper |
author |
Franziska Göttl Michael Schmidt Florian Seitz |
author_facet |
Franziska Göttl Michael Schmidt Florian Seitz |
author_sort |
Franziska Göttl |
title |
Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
title_short |
Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
title_full |
Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
title_fullStr |
Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
title_full_unstemmed |
Mass-related excitation of polar motion: an assessment of the new RL06 GRACE gravity field models |
title_sort |
mass-related excitation of polar motion: an assessment of the new rl06 grace gravity field models |
publisher |
SpringerOpen |
publishDate |
2018 |
url |
https://doi.org/10.1186/s40623-018-0968-4 https://doaj.org/article/8b38af8ae40941a19d6f713ea9186abd |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_source |
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-10 (2018) |
op_relation |
http://link.springer.com/article/10.1186/s40623-018-0968-4 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-018-0968-4 1880-5981 https://doaj.org/article/8b38af8ae40941a19d6f713ea9186abd |
op_doi |
https://doi.org/10.1186/s40623-018-0968-4 |
container_title |
Earth, Planets and Space |
container_volume |
70 |
container_issue |
1 |
_version_ |
1766068035992420352 |