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Benchmark forward gravity schemes: the gravity field of a realistic lithosphere model WINTERC-G
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SYSNO ASEP 0557403 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Benchmark forward gravity schemes: the gravity field of a realistic lithosphere model WINTERC-G Author(s) Root, B. (DE)
Sebera, Josef (ASU-R) RID, ORCID
Szwillus, W. (DE)
Thieulot, C. (NL)
Martinec, Z. (IE)
Fullea, J. (IE)Number of authors 6 Source Title Solid Earth. - : Copernicus - ISSN 1869-9510
Roč. 13, č. 5 (2022), s. 849-873Number of pages 25 s. Publication form Online - E Language eng - English Country DE - Germany Keywords gravity ; benchmark ; lithosphere Subject RIV DE - Earth Magnetism, Geodesy, Geography OECD category Physical geography Method of publishing Limited access Institutional support ASU-R - RVO:67985815 UT WOS 000790289900001 EID SCOPUS 85130637814 DOI 10.5194/se-13-849-2022 Annotation Several alternative gravity forward modelling methodologies and associated numerical codes with their own advantages and limitations are available for the solid Earth community. With upcoming state-of-the-art lithosphere density models and accurate global gravity field data sets, it is vital to understand the opportunities and limitations of the various approaches. In this paper, we discuss the four widely used techniques: global spherical harmonics (GSH), tesseroid integration ( LESS), triangle integration (TRI), and hexahedral integration (HEX). A constant density shell benchmark shows that all four codes can produce similar precise gravitational potential fields. Two additional shell tests were conducted with more complicated density structures: laterally varying density structures and a crust- mantle interface density. The differences between the four codes were all below 1.5 % of the modelled gravity signal suitable for reproducing satellite-acquired gravity data. TESS and GSH produced the most similar potential fields (< 0.3 %). Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2023 Electronic address https://doi.org/10.5194/se-13-849-2022
Number of the records: 1