Pajala Fireball

2021 ◽  
Author(s):  
Juha Vierinen ◽  
Torsten Aslaksen ◽  
Jorge Chau ◽  
Maria Gritsevich ◽  
Björn Gustavsson ◽  
...  
Keyword(s):  
Shock Waves ◽  
Chemical Reactions ◽  
Imaging System ◽  
Plasma Turbulence ◽  
Meteor Shower ◽  
Plasma Transport ◽  
Earth’S Atmosphere ◽  
Meteoric Body ◽  
Earth's Atmosphere ◽  
Made In

<p>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.</p>

scholarly journals Odin–OSIRIS detection of the Chelyabinsk meteor

2014 ◽  
Vol 7 (3) ◽  
pp. 777-780 ◽  
Author(s):  
L. A. Rieger ◽  
A. E. Bourassa ◽  
D. A. Degenstein
Keyword(s):  
High Altitude ◽  
Infrared Imaging ◽  
Imaging System ◽  
Stratospheric Aerosol ◽  
Processing Algorithm ◽  
Earth’S Atmosphere ◽  
Aerosol Loading ◽  
Infrared Imaging System ◽  
Earth's Atmosphere

Abstract. On 15 February 2013 an 11 000 ton meteor entered Earth's atmosphere southeast of Chelyabinsk, creating a large fireball at 23 km altitude. The resulting stratospheric aerosol loading was detected by the Ozone Mapping and Profiler Suite (OMPS) in a high-altitude polar belt. This work confirms the presence and lifetime of the stratospheric debris using the Optical Spectrograph and InfraRed Imaging System (OSIRIS) onboard the Odin satellite. Although OSIRIS coverage begins in mid-March, the measurements show a belt of enhanced scattering near 35 km altitude between 50° N and 70° N. Initially, enhancements show increased scattering of up to 15% over the background conditions, decaying in intensity and dropping in altitude until they are indistinguishable from background conditions by mid-May. An inversion is also attempted using the standard OSIRIS processing algorithm to determine the extinction in the meteoric debris.

scholarly journals Physics of meteor generated shock waves in the Earth’s atmosphere – A review

2018 ◽  
Vol 62 (3) ◽  
pp. 489-532 ◽  
Author(s):  
Elizabeth A. Silber ◽  
Mark Boslough ◽  
Wayne K. Hocking ◽  
Maria Gritsevich ◽  
Rodney W. Whitaker
Keyword(s):  
Shock Waves ◽  
Earth’S Atmosphere ◽  
Earth's Atmosphere

scholarly journals Cosmic Dust May Be Key Source of Phosphorus for Life on Earth

Eos ◽  
2021 ◽  
Vol 102 ◽  
Author(s):  
Sarah Stanley
Keyword(s):  
Chemical Reactions ◽  
Cosmic Dust ◽  
Biological Processes ◽  
Earth’S Atmosphere ◽  
Phosphorus Containing ◽  
Earth's Atmosphere ◽  
Life On Earth

When tiny particles enter Earth’s atmosphere, a newly described series of chemical reactions may lead to production of phosphorus-containing molecules that are essential for biological processes.

scholarly journals III. Transmission of sunlight through the Earth’s atmosphere

1887 ◽  
Vol 42 (251-257) ◽  
pp. 170-172
Keyword(s):  
Wave Length ◽  
Solar Spectrum ◽  
Transmitted Wave ◽  
The Other ◽  
Earth’S Atmosphere ◽  
Minimum Value ◽  
Subsequent Investigation ◽  
Earth's Atmosphere ◽  
The Law ◽  
Made In

The observations were made by means of the colour photometer which General Festing and himself introduced last year, and which they described in the Bakerian Lecture for 1886. They extended over more than a year, the object being to ascertain the intensity of the different rays in the solar spectrum after passing through various thicknesses of the atmosphere. Owing to the unpromising results obtained by Langley with his bolometer experiments, it was not anticipated that the variation in the intensities of the different rays would obey any law, but subsequent investigation showed that as a rule the intensity of any ray obeyed the law enunciated by Lord Rayleigh, in that I' = I ε - kxλ -4 , where I and I' are the initial and transmitted wave-lengths, x the thickness of the medium through which the ray passed, and k a constant, λ being the wave-length. The standard illuminating value of the spectrum was taken from observations made in Switzerland at 8000 feet altitude on September 15 at noon. The other observations were made at South Kensington. It was found that with the wind in the proper quarter the sky at the latter place was as pure in colour as in the country, and that measures made on the days on which there was apparently no haze gave results which when combined together gave a minimum value for k of 0·0013. A mean of the results showed that k = 0·0017.

Radiation of strong shock waves propagating in the earth’s atmosphere

1999 ◽  
Vol 72 (6) ◽  
pp. 1111-1120
Author(s):  
K. L. Stepanov ◽  
Yu. A. Stankevich ◽  
L. K. Stanchits
Keyword(s):  
Shock Waves ◽  
Strong Shock ◽  
Earth’S Atmosphere ◽  
Earth's Atmosphere ◽  
Strong Shock Waves

scholarly journals Odin-OSIRIS detection of the Chelyabinsk meteor

2013 ◽  
Vol 6 (5) ◽  
pp. 8435-8443 ◽  
Author(s):  
L. A. Rieger ◽  
A. E. Bourassa ◽  
D. A. Degenstein
Keyword(s):  
High Altitude ◽  
Infrared Imaging ◽  
Imaging System ◽  
Stratospheric Aerosol ◽  
Earth’S Atmosphere ◽  
Aerosol Loading ◽  
Infrared Imaging System ◽  
Earth's Atmosphere

Abstract. On 15 February 2013 an 11 000 ton meteor entered Earth's atmosphere south east of Chelyabinsk creating a large fireball at 23 km altitude. The resulting stratospheric aerosol loading was detected by the Ozone Mapping and Profiler Suite (OMPS) in a high altitude polar belt. This work confirms the presence and lifetime of the stratospheric debris using the Optical Spectrograph and InfraRed Imaging System (OSIRIS) onboard the Odin satellite. Although OSIRIS coverage begins in mid-March, the measurements show a belt of enhanced scattering near 35 km altitude between 50° N and 70° N. Initially, enhancements show increased scattering of up to 15% over the background conditions, decaying in intensity and dropping in altitude until they are indistinguishable from background conditions by mid-May.

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