Geomagnetic field shielding over the last one hundred thousand years

نویسندگان

چکیده

The geomagnetic field prevents energetic particles, such as galactic cosmic rays, from directly interacting with the Earth’s atmosphere. is not static but constantly changing, and over last 100,000 years, several excursions occurred. During excursions, strength significantly decreased morphology strongly influenced by non-dipole components, more ray particles can access Paleomagnetic models provide a global view of long-term evolution, however, individual spatial temporal resolution uncertainties. Here, we reconstruct shielding effect years calculating cutoff rigidity using four paleomagnetic models, i.e., GGF100k, GGFSS70, LSMOD.2, CALS10k.2 model. We compare results for overlapping periods find that model selection crucial to constrain variation. However, all indicate components are negligible estimating effect. combined record rigidities best available time intervals. Our possibility estimate cosmogenic isotope production rate radiation dose covering according current knowledge about will be useful in further solar activity climate change reconstruction.

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ژورنال

عنوان ژورنال: Journal of Space Weather and Space Climate

سال: 2022

ISSN: ['2115-7251']

DOI: https://doi.org/10.1051/swsc/2022027