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A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence


Guo, Jingnan; Wimmer-Schweingruber, Robert F.; Dumbović, Mateja; Heber, Bernd; Wang, Yuming
A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence // Earth and Planetary Physics, 4 (2020), 1; 62-72 doi:10.26464/epp2020007 (međunarodna recenzija, članak, znanstveni)


Naslov
A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence

Autori
Guo, Jingnan ; Wimmer-Schweingruber, Robert F. ; Dumbović, Mateja ; Heber, Bernd ; Wang, Yuming

Izvornik
Earth and Planetary Physics (2096-3955) 4 (2020), 1; 62-72

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

Ključne riječi
ICME and Forbush decreases, space weather at Mars, Mars: atmosphere, GCR radiation

Sažetak
Forbush decreases are depressions in the galactic cosmic rays (GCRs) which are mostly caused by the modulations of interplanetary coronal mass ejections (ICMEs) and also some- times by stream/corotating interaction regions (SIRs/CIRs). Forbush decreases have been studied extensively using neutron monitors at Earth and have been recently, for the first time, measured on the surface of another planet - Mars by the Radiation Assessment Detector (RAD), on board Mars Science Laboratory’s (MSL) rover Curiosity. The modulation of the GCR particles by heliospheric transients in space is energy-dependent and afterwards these particles are also interacting with the Martian atmosphere with the interaction process de- pending on the particle type and energy. In order to study the space weather environment near Mars using the ground-measured Forbush decreases, it is important to understand and quantify the energy- dependent modulation of the GCR particles by not only the pass-by he- liospheric disturbances but also the Martian atmosphere. In this study, we develop a model which combines the heliospheric modulation of GCRs and the atmospheric modification of such modulated GCR spectra to quantify the amplitudes of the Forbush decreases at Mars: both on ground and in the interplanetary space near Mars during the pass-by of an ICME/SIR. The modeled results are in good agreement when compared to studies of Forbush decreases caused by ICMEs/SIRs measured by MSL on the surface of Mars and by the Mars Atmo- sphere and Volatile EvolutioN (MAVEN) spacecraft in orbit. This supports the validity of both the Forbush decrease description and the Martian atmospheric transport models.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Citiraj ovu publikaciju

Guo, Jingnan; Wimmer-Schweingruber, Robert F.; Dumbović, Mateja; Heber, Bernd; Wang, Yuming
A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence // Earth and Planetary Physics, 4 (2020), 1; 62-72 doi:10.26464/epp2020007 (međunarodna recenzija, članak, znanstveni)
Guo, J., Wimmer-Schweingruber, R., Dumbović, M., Heber, B. & Wang, Y. (2020) A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence. Earth and Planetary Physics, 4 (1), 62-72 doi:10.26464/epp2020007.
@article{article, year = {2020}, pages = {62-72}, DOI = {10.26464/epp2020007}, keywords = {ICME and Forbush decreases, space weather at Mars, Mars: atmosphere, GCR radiation}, journal = {Earth and Planetary Physics}, doi = {10.26464/epp2020007}, volume = {4}, number = {1}, issn = {2096-3955}, title = {A new model describing Forbush Decreases at Mars: combining the heliospheric modulation and the atmospheric influence}, keyword = {ICME and Forbush decreases, space weather at Mars, Mars: atmosphere, GCR radiation} }

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