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International Geomagnetic Reference Field: the thirteenth generation

P Alken 1, 2, * E Thébault 3 C Beggan 4 H Amit 3 J Aubert 5 J Baerenzung 6 T Bondar 7 W Brown 3 S Califf 1, 2 A Chambodut 8 A Chulliat 1, 2 G Cox 3 C Finlay 9 A Fournier 5 N Gillet 10 A Grayver 11 M Hammer 9 M Holschneider 6 L Huder 10 G Hulot 5 T Jager 12, 13 C Kloss 9 M Korte 14 W Kuang 15 A Kuvshinov 11 Benoit Langlais 3 J-M Léger 12, 13 V Lesur 5 P Livermore 16 F Lowes 17 S Macmillan 4 W Magnes 18 M Mandea 19 S Marsal 20 J Matzka 14 M Metman 16 T Minami 21 A Morschhauser 14 J Mound 16 M Nair 1, 2 S Nakano 22 N Olsen 9 F Pavón-Carrasco 23, 24 V Petrov 7 G Ropp 5 M Rother 14 T Sabaka 15 S Sanchez 25 D Saturnino 3 N Schnepf 1, 2 X Shen 26 C Stolle 14 A Tangborn 25 L Tøffner-Clausen 9 H Toh 27 J Torta 20 J Varner 1, 2 F Vervelidou 14 P Vigneron 5 I Wardinski 8 J Wicht 25 A Woods 1, 2 Y Yang 26 Z Zeren 26 B Zhou 28
* Corresponding author
Abstract : In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted the thirteenth generation of the International Geomagnetic Reference Field (IGRF). This IGRF updates the previous generation with a definitive main field model for epoch 2015.0, a main field model for epoch 2020.0, and a predictive linear secular variation for 2020.0 to 2025.0. This letter provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020.0 to 2025.0 time period.
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Submitted on : Monday, February 15, 2021 - 7:31:03 AM
Last modification on : Wednesday, October 27, 2021 - 4:10:28 PM
Long-term archiving on: : Sunday, May 16, 2021 - 6:14:18 PM

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P Alken, E Thébault, C Beggan, H Amit, J Aubert, et al.. International Geomagnetic Reference Field: the thirteenth generation. Earth Planets and Space, Springer/Terra Scientific Publishing Company, 2021, 73, pp.49. ⟨10.1186/s40623-020-01288-x⟩. ⟨cea-03141089⟩

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