Variations of interplanetary magnetic field on various long time-scales

Autor:	Yury A. Nagovitsyn, A. A. Osipova
Rok vydání:	2019
Předmět:	Physics 010504 meteorology & atmospheric sciences Space and Planetary Science 0103 physical sciences Astronomy and Astrophysics Geophysics Interplanetary magnetic field 010303 astronomy & astrophysics 01 natural sciences 0105 earth and related environmental sciences
Zdroj:	Monthly Notices of the Royal Astronomical Society. 492:1914-1918
ISSN:	1365-2966 0035-8711
Popis:	The IDV index of geomagnetic activity is used by many researchers as a proxy of the interplanetary magnetic field (IMF) strength B. Using the original multiscale regression (MSR) method based on wavelet transformation, we obtained a long series of B values starting from 1845. Then, based on the new 2.0 versions of the sunspot number and group sunspot number and using MSR method and this series as a reference, we reconstructed IMF strength B starting from 1610. Further extension of the reconstruction is associated with radiocarbon reconstructions of solar activity at a time-scale of up to several millennia. It is shown that in the last 3200 yr the IMF strength has been experiencing a downward trend of −(0.39 ± 0.17) · 10−3 nT· yr−1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb1d8f6469f93a5140f2fcf4a2fac603 https://doi.org/10.1093/mnras/stz3594 Zobrazit plný text záznamu