International Geomagnetic Reference Field - The Thirteenth Generation
-
Citation: Earth, Planets and Space 2022 74:11
-
Using improved Swarm’s experimental absolute vector mode data to produce a candidate Definitive Geomagnetic Reference Field (DGRF) 2015.0 model
We describe the way a global model of the geomagnetic field has been built using vector field data acquired by the absolute scalar magnetometers (ASM) running in vector mode on board the Alpha and Bravo satell...
Citation: Earth, Planets and Space 2021 73:197 -
Physics-based secular variation candidate models for the IGRF
Each International Geomagnetic Reference Field (IGRF) model released under the auspices of the International Association of Geomagnetism and Aeronomy comprises a secular variation component that describes the ...
Citation: Earth, Planets and Space 2021 73:190 -
The Mag.num core field model as a parent for IGRF-13, and the recent evolution of the South Atlantic Anomaly
Citation: Earth, Planets and Space 2021 73:50 -
International Geomagnetic Reference Field: the thirteenth generation
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). T...
Citation: Earth, Planets and Space 2021 73:49 -
Evaluation of candidate models for the 13th generation International Geomagnetic Reference Field
In December 2019, the 13th revision of the International Geomagnetic Reference Field (IGRF) was released by the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group V-MOD. Thi...
Citation: Earth, Planets and Space 2021 73:48 -
Geomagnetic secular variation forecast using the NASA GEMS ensemble Kalman filter: A candidate SV model for IGRF-13
We have produced a 5-year mean secular variation (SV) of the geomagnetic field for the period 2020–2025. We use the NASA Geomagnetic Ensemble Modeling System (GEMS), which consists of the NASA Goddard geodynam...
Citation: Earth, Planets and Space 2021 73:47 -
IZMIRAN candidate field model for IGRF-13
The International Geomagnetic Reference Field (IGRF) model is a combination of the several models developed by independent groups of scientists using different approaches for the selection of input data and me...
Citation: Earth, Planets and Space 2021 73:46 -
The CSES global geomagnetic field model (CGGM): an IGRF-type global geomagnetic field model based on data from the China Seismo-Electromagnetic Satellite
Using magnetic field data from the China Seismo-Electromagnetic Satellite (CSES) mission, we derive a global geomagnetic field model, which we call the CSES Global Geomagnetic Field Model (CGGM). This model de...
Citation: Earth, Planets and Space 2021 73:45 -
NOAA/NCEI and University of Colorado candidate models for IGRF-13
The International Geomagnetic Reference Field (IGRF) is a set of parameters representing the large-scale internal part of Earth’s magnetic field. The 13th generation IGRF requested candidate models for a defin...
Citation: Earth, Planets and Space 2021 73:44 -
A secular variation candidate model for IGRF-13 based on Swarm data and ensemble inverse geodynamo modelling
This paper describes the design of a candidate secular variation model for the 13th generation of the International Geomagnetic Reference Field. This candidate is based upon the integration of an ensemble of 1...
Citation: Earth, Planets and Space 2021 73:43 -
The BGS candidate models for IGRF-13 with a retrospective analysis of IGRF-12 secular variation forecasts
The three candidate models submitted by the British Geological Survey for the 13th generation International Geomagnetic Reference Field are described. These DGRF and IGRF models are derived from vector and sca...
Citation: Earth, Planets and Space 2021 73:42 -
The Kalmag model as a candidate for IGRF-13
We present a new model of the geomagnetic field spanning the last 20 years and called Kalmag. Deriving from the assimilation of CHAMP and Swarm vector field measurements, it separates the different contributio...
Citation: Earth, Planets and Space 2020 72:163 -
COV-OBS.x2: 180 years of geomagnetic field evolution from ground-based and satellite observations
We present the geomagnetic field model COV-OBS.x2 that covers the period 1840–2020. It is primarily constrained by observatory series, satellite data, plus older surveys. Over the past two decades, we consider...
Citation: Earth, Planets and Space 2020 72:160 -
Predictions of the geomagnetic secular variation based on the ensemble sequential assimilation of geomagnetic field models by dynamo simulations
The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13...
Citation: Earth, Planets and Space 2020 72:157 -
Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13)
Observations of the geomagnetic field taken at Earth’s surface and at satellite altitude are combined to construct continuous models of the geomagnetic field and its secular variation from 1957 to 2020. From t...
Citation: Earth, Planets and Space 2020 72:155 -
Sequential modelling of the Earth’s core magnetic field
We describe a new, original approach to the modelling of the Earth’s magnetic field. The overall objective of this study is to reliably render fast variations of the core field and its secular variation. This ...
Citation: Earth, Planets and Space 2020 72:153 -
Bootstrapping Swarm and observatory data to generate candidates for the DGRF and IGRF-13
As posted by the Working Group V of the International Association of Geomagnetism and Aeronomy (IAGA), the 13th generation of the International Geomagnetic Reference Field (IGRF) has been released at the end o...
Citation: Earth, Planets and Space 2020 72:152 -
The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly
We present the CHAOS-7 model of the time-dependent near-Earth geomagnetic field between 1999 and 2020 based on magnetic field observations collected by the low-Earth orbit satellites Swarm, CryoSat-2, CHAMP, SAC-...
Citation: Earth, Planets and Space 2020 72:156 -
Forecasting yearly geomagnetic variation through sequential estimation of core flow and magnetic diffusion
Earth’s internal magnetic field is generated through motion of the electrically conductive iron-alloy fluid comprising its outer core. Temporal variability of this magnetic field, termed secular variation (SV)...
Citation: Earth, Planets and Space 2020 72:149 -
A candidate secular variation model for IGRF-13 based on MHD dynamo simulation and 4DEnVar data assimilation
We have submitted a secular variation (SV) candidate model for the thirteenth generation of International Geomagnetic Reference Field model (IGRF-13) using a data assimilation scheme and a magnetohydrodynamic ...
Citation: Earth, Planets and Space 2020 72:136 -
CM6: a comprehensive geomagnetic field model derived from both CHAMP and Swarm satellite observations
From the launch of the Ørsted satellite in 1999, through the CHAMP mission from 2000 to 2010, and now with the Swarm constellation mission starting in 2013, satellite magnetometry has provided excellent monito...
Citation: Earth, Planets and Space 2020 72:80