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The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly [PDF]
Earth, Planets and Space, 2020 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-C and Ørsted, and on annual differences of
Christopher C. Finlay +6 more
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Drift rate of the South Atlantic Anomaly [PDF]
Journal of Geophysical Research: Space Physics, 1997 A portion of the secular change of the geomagnetic field leads to a drift of the trapped belt South Atlantic Anomaly (SAA). If this drift is not taken into account, models of the trapped particle population give erroneous predictions of particle fluxes.
G. D. Badhwar
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Impact of the South Atlantic Anomaly on radiation exposure at flight altitudes during solar minimum [PDF]
Scientific Reports, 2023 The South Atlantic Anomaly (SAA) is a geographical region over the South Atlantic Ocean where the inner Van Allen radiation belt extends down particularly close to Earth.
Matthias M. Meier +7 more
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Speleothem record of geomagnetic South Atlantic Anomaly recurrence. [PDF]
Proc Natl Acad Sci U S A, 2018 The diminishing strength of the Earth’s magnetic dipole over recent millennia is accompanied by the increasing prominence of the geomagnetic South Atlantic Anomaly (SAA), which spreads over the South Atlantic Ocean and South America. The longevity of this feature at millennial timescales is elusive because of the scarcity of continuous geomagnetic data
Trindade RIF +11 more
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Characterization of the South Atlantic Anomaly [PDF]
Nonlinear Processes in Geophysics, 2018 Abstract. This research intends to characterize the South Atlantic Anomaly (SAA) by applying power spectrum analysis approach. From the approach, the Hurst exponent can be determined. The motivation to study the SAA region is due to its nature.
Khairul Afifi Nasuddin +2 more
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Sensitivity of the Atlantic meridional overturning circulation to South Atlantic freshwater anomalies [PDF]
Climate Dynamics, 2012 The sensitivity of the Atlantic Meridional Overturning Circulation (AMOC) to changes in basin integrated net evaporation is highly dependent on the zonal salinity contrast at the southern border of the Atlantic.
A Ganopolski +26 more
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Theoretical study of the ionospheric dynamo region inside the South Atlantic Anomaly
Earth and Planetary Physics, 2023 The South Atlantic Anomaly (SAA) is a region where the geomagnetic field is significantly lower than that of the surrounding area. On the basis of the models of CHAOS-7.8, Mass Spectrometer Incoherent Scatter Model (NRLMSISE-00), and International ...
SiQi Yi +7 more
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Time evolution of the South Atlantic Magnetic Anomaly [PDF]
Anais da Academia Brasileira de Ciências, 2009 The South Atlantic Magnetic Anomaly (SAMA) is one of the most outstanding anomalies of the geomagnetic field. The SAMA secular variation was obtained and compared to the evolution of other anomalies using spherical harmonic field models for the 1590-2005
Gelvam A. Hartmann, Igor G. Pacca
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South Atlantic anomaly and CubeSat design considerations
SPIE Proceedings, 2015 Effects of the South Atlantic Anomaly (SAA) on spacecraft in low Earth orbit (LEO) are well known and documented. The SAA exposes spacecraft in LEO to high dose of ionizing radiation as well as higher than normal rates of Single Event Upsets (SEU) and Single Event Latch-ups (SEL).
J. A. Fennelly +5 more
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Non-monotonic growth and motion of the South Atlantic Anomaly [PDF]
Earth, Planets and Space, 2021 The South Atlantic Anomaly (SAA) is a region at Earth’s surface where the intensity of the magnetic field is particularly low. Accurate characterization of the SAA is important for both fundamental understanding of core dynamics and the geodynamo as well
Hagay Amit +3 more
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