International Geomagnetic Reference Field: the thirteenth generation

P Alken (1, 2) , Erwan Thébault (3) , C D Beggan (4) , Hagay Amit (3) , J Aubert (5) , J Baerenzung (6) , T N Bondar (7) , W J Brown (3) , S Califf (1, 2) , A Chambodut (8) , A Chulliat (1, 2) , G A Cox (3) , C C Finlay (9) , A Fournier (5) , N Gillet (10) , A Grayver (11) , M D Hammer (9) , M Holschneider (6) , L Huder (10) , G 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 W Livermore (16) , F J Lowes (17) , S Macmillan (4) , W Magnes (18) , M Mandea (19) , S Marsal (20) , J Matzka (14) , M C Metman (16) , T Minami (21) , A Morschhauser (14) , J E Mound (16) , M Nair (1, 2) , S Nakano (22) , N Olsen (9) , F J Pavón-Carrasco (23, 24) , V G Petrov (7) , G Ropp (5) , M Rother (14) , T J Sabaka (15) , S Sanchez (25) , Diana Saturnino (3) , N R Schnepf (1, 2) , X Shen (26) , C Stolle (14) , A Tangborn (25) , L Tøffner-Clausen (9) , H Toh (27) , J M 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)

1 CIRES - Cooperative Institute for Research in Environmental Sciences
2 NCEI - NOAA National Centers for Environmental Information
3 LPG - Laboratoire de Planétologie et Géodynamique [UMR 6112]
4 British Geological Survey [Edinburgh]
5 IPGP (UMR_7154) - Institut de Physique du Globe de Paris
6 FHP - University of Applied Sciences Potsdam
7 IZMIRAN - Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation
8 IPGS - Institut de physique du globe de Strasbourg
9 Division of Geomagnetism, DTU Space, Technical
10 UGA - Université Grenoble Alpes
11 Institute of Geophysics [ETH Zürich]
12 DSYS - Département Systèmes
13 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
14 GFZ - German Research Centre for Geosciences - Helmholtz-Centre Potsdam
15 GSFC - NASA Goddard Space Flight Center
16 SEE - School of Earth and Environment [Leeds]
17 University of Northumbria at Newcastle [United Kingdom]
18 Austrian Academy of Sciences,
19 CNES - Centre National d’Études Spatiales [Paris]
20 OE - Observatori de l'Ebre
21 Graduate School of Environmental Studies [Nagoya]
22 Tokyo - The Institute of Statistical Mathematics
23 UCM - Universidad Complutense de Madrid = Complutense University of Madrid [Madrid]
24 IGEO - Instituto de Geociencias [Madrid]
25 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
26 Institute of Crustal Dynamics [Beijing]
27 Division of Earth and Planetary Sciences [Kyoto]
28 State Key Laboratory of Space Weather, National Space Science Center

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.

Mots clés: IGRF; Magnetic field modeling; Geomagnetism

Domaines: Géophysique [physics.geo-ph]

P Alken, Erwan Thébault, C D Beggan, Hagay Amit, J Aubert, et al.. International Geomagnetic Reference Field: the thirteenth generation. Earth Planets and Space, 2021, 73, pp.49. ⟨10.1186/s40623-020-01288-x⟩. ⟨cea-03141089⟩