O2 Other

Pajala Fireball




List of Authors: Vierinen Juha, Aslaksen Torsten, Chau Jorge, Gritsevich Maria, Gustavsson Björn, Kastinen Daniel, Kero Johan, Kozlovsky Alexandre, McKay Derek, Midtskogen Steinar, Ulich Thomas, Vegum Ketil

Conference name: EGU General Assembly

Place: Online

Publication year: 2021

Book title *: EGU General Assembly 2021

Title of series: European Geophysical Union

Number in series: 2021

Volume number: 2021

DOI: http://dx.doi.org/10.5194/egusphere-egu21-14715


Abstract

Meteoroids entering the Earth's atmosphere are associated with a number
of phenomena including ablation, ambipolar diffusion, plasma transport,
chemical reactions, shock waves, and plasma turbulence. A bright
daylight fireball observed on 2020-12-04 13:30 UTC with two meteor
cameras located in Skibotn and Sørreisa allowed the precise entry
trajectory of the fireball to be determined. The path of the entering
object is approximately between Angeli Finland and Pajala Sweden. Based
on the brightness and entry trajectory, it is possible to estimate the
approximate mass of the object, and associate it with a meteor shower
(Northern Taurids). The effects of the fireball on the atmosphere were
detected with a number of radar and radio instruments within the region,
including ionosondes, meteor radars, an all-sky VHF imaging system, and
an infrasound sensor. These observations allow a detailed study of the
atmospheric interaction of a large meteoric body with the Earth's
atmosphere to be made. In this talk, we will describe the observations
of this fireball and discuss preliminary findings.


Last updated on 2021-24-06 at 09:28