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Physical Sciences › Earth and Planetary Sciences › Geophysics
International Geomagnetic Reference Field: the thirteenth generation
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Conflicts of Interest
Identified Weaknesses
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Paper Summary
Paperzilla title
Earth's Magnetic Makeover: New and Improved Model for 2020!
The thirteenth generation of the International Geomagnetic Reference Field (IGRF-13) provides updated models of Earth's main magnetic field for epochs 2015.0 and 2020.0, along with a predictive secular variation model for 2020.0-2025.0. The model reveals continued weakening of the dipole moment and westward drift of the South Atlantic Anomaly, with significant implications for navigation, satellite operations, and studies of Earth's core and magnetosphere.
Possible Conflicts of Interest
None identified
Identified Weaknesses
Short-term prediction
The predictive linear secular variation model only covers a short time period of 5 years (2020.0-2025.0), limiting its long-term forecasting capabilities.
Simplified representation
The IGRF model, being a spherical harmonic representation, simplifies the complex nature of Earth's magnetic field, especially at smaller scales and near the core-mantle boundary.
Data limitations
The model's accuracy is limited by data coverage and quality, particularly in regions with sparse or no measurements, like the oceans and polar regions.
Rating Explanation
This paper presents a valuable update to the IGRF, a crucial tool for various scientific applications. The rigorous methodology, international collaboration, and detailed analysis warrant a strong rating. Though limitations related to prediction timeframe and simplified representation exist, the model's practical utility and continuous improvements make it a significant contribution.
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File Information
Original Title:
International Geomagnetic Reference Field: the thirteenth generation
File Name:
s40623-020-01288-x.pdf
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File Size:
3.45 MB
Uploaded:
July 14, 2025 at 05:13 PM
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