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Nitric Oxide Production by Centimeter-Sized Meteoroids and the Role of Linear and Nonlinear Processes in the Shock Bound Flow Fields

1
Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, USA
2
Flow Physics Department, INCAS—National Institute for Aerospace Research “Elie Carafoli”, Numerical Simulation Unit, Bucharest 061126, Romania
3
Department of Cybernetics and Artificial Intelligence, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Kosice 04200, Slovakia
4
Department of Earth Sciences, The University of Western Ontario, London, ON N6A 3B7, Canada
*
Author to whom correspondence should be addressed.
Atmosphere 2018, 9(5), 202; https://doi.org/10.3390/atmos9050202
Received: 8 April 2018 / Revised: 12 May 2018 / Accepted: 15 May 2018 / Published: 22 May 2018
(This article belongs to the Special Issue Transition from Linear to Non-Linear Flows in Atmospheric Processes)
Nitric oxide (NO) is a critical indicator of energy deposition in the lower thermosphere because of its formational pathways. Thus, it is important to constrain sources of NO, such as meteoroid generated hypersonic flows below 95 km altitude. This paper aims to examine the process of and place the upper estimate on NO production in high temperature flow fields of strongly ablating meteoroids. For centimeter-sized meteoroids, the production of NO is bound within the dynamically stable volume of bright meteor plasma trains in the region of 80–95 km. Our estimate of the upper limit of the cumulative mass of NO produced annually by centimeter-sized meteoroids is significantly lower than that reported in previous early studies. In the context of shock waves, we explored the reasons why centimeter-sized meteoroids are the most efficient producers of NO. Effects of nonlinear processes on meteoric NO production are discussed. View Full-Text
Keywords: meteors; shock waves; nonlinear process; nitric oxide; mesosphere; thermosphere; meteoroids meteors; shock waves; nonlinear process; nitric oxide; mesosphere; thermosphere; meteoroids
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Silber, E.A.; Niculescu, M.L.; Butka, P.; Silber, R.E. Nitric Oxide Production by Centimeter-Sized Meteoroids and the Role of Linear and Nonlinear Processes in the Shock Bound Flow Fields. Atmosphere 2018, 9, 202.

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