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Pregled bibliografske jedinice broj: 1053784

Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars


Freiherr von Forstner, Johan L.; Guo, Jingnan; Wimmer- Schweingruber, Robert F.; Dumbović, Mateja; Janvier, Miho; Demoulin, Pascal; Veronig, Astrid; Temmer, Manuela; Papaioannou, Athanasios; Dasso, Sergio et al.
Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars // Journal of geophysical research, n/a (2020), n/a. doi:10.1029/2019JA027662 (međunarodna recenzija, članak, znanstveni)


Naslov
Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars

Autori
Freiherr von Forstner, Johan L. ; Guo, Jingnan ; Wimmer- Schweingruber, Robert F. ; Dumbović, Mateja ; Janvier, Miho ; Demoulin, Pascal ; Veronig, Astrid ; Temmer, Manuela ; Papaioannou, Athanasios ; Dasso, Sergio ; Hassler, Donald M. ; Zeitlin, Cary J.

Izvornik
Journal of geophysical research (0148-0227) N/a (2020), N/a; E2019JA027662, 0

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ICME, Forbush decrease, GCR, MSL, Mars mission, radiation

Sažetak
Abstract Forbush decreases (FDs), which are short-term drops in the flux of galactic cosmic rays (GCR), are caused by the shielding from strong and/or turbulent magnetic structures in the solar wind, especially interplanetary coronal mass ejections (ICMEs) and their associated shocks, as well as corotating interaction regions (CIRs). Such events can be observed at Earth, e.g. using neutron monitors, but also at many other locations in the solar system, such as on the surface of Mars with the Radiation Assessment Detector (RAD) instrument onboard Mars Science Laboratory (MSL). They are often used as a proxy for detecting the arrival of ICMEs or CIRs, especially when sufficient in situ solar wind measurements are not available. We compare the properties of FDs observed at Earth and Mars, focusing on events produced by ICMEs. We find that FDs at both locations show a correlation between their total amplitude and the maximum hourly decrease, but with different proportionality factors. We explain this difference using theoretical modelling approaches and suggest that it is related to the size increase of ICMEs, and in particular their sheath regions, en route from Earth to Mars. From the FD data, we can derive the sheath broadening factor to be between about 1.5 and 1.9, agreeing with our theoretical considerations. This factor is also in line with previous measurements of the sheath evolution closer to the Sun.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Citiraj ovu publikaciju

Freiherr von Forstner, Johan L.; Guo, Jingnan; Wimmer- Schweingruber, Robert F.; Dumbović, Mateja; Janvier, Miho; Demoulin, Pascal; Veronig, Astrid; Temmer, Manuela; Papaioannou, Athanasios; Dasso, Sergio et al.
Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars // Journal of geophysical research, n/a (2020), n/a. doi:10.1029/2019JA027662 (međunarodna recenzija, članak, znanstveni)
Freiherr von Forstner, J., Guo, J., Wimmer- Schweingruber, R., Dumbović, M., Janvier, M., Demoulin, P., Veronig, A., Temmer, M., Papaioannou, A. & Dasso, S. (2020) Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars. Journal of geophysical research, n/a (n/a) doi:10.1029/2019JA027662.
@article{article, year = {2020}, DOI = {10.1029/2019JA027662}, chapter = {e2019JA027662}, keywords = {ICME, Forbush decrease, GCR, MSL, Mars mission, radiation}, journal = {Journal of geophysical research}, doi = {10.1029/2019JA027662}, volume = {n/a}, number = {n/a}, issn = {0148-0227}, title = {Comparing the Properties of ICME-Induced Forbush decreases at Earth and Mars}, keyword = {ICME, Forbush decrease, GCR, MSL, Mars mission, radiation}, chapternumber = {e2019JA027662} }

Časopis indeksira:


  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • NASA/ADS


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