Nitrogen Oxide Production in Laser-Induced Breakdown Simulating Impacts on the Hadean Atmosphere

0580547 - ÚFP 2024 RIV US eng J - Článek v odborném periodiku
Heays, A.N. - Kaiserová, T. - Rimmer, P. B. - Knížek, A. - Petera, L. - Civiš, S. - Juha, Libor - Dudžák, Roman - Krůs, Miroslav - Scherf, M. - Lammer, H. - Pascal, R. - Ferus, M.
Nitrogen Oxide Production in Laser-Induced Breakdown Simulating Impacts on the Hadean Atmosphere.
Journal of Geophysical Research: Planets. Roč. 127, č. 3 (2022), č. článku e2021JE006842. ISSN 2169-9097. E-ISSN 2169-9100
Grant CEP: GA ČR(CZ) GA21-11366S; GA MŠMT EF16_019/0000778; GA MŠMT(CZ) LM2018114
Institucionální podpora: RVO:61389021
Klíčová slova: Hadean * impact * libs * nitrous oxide * NOx * warming
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 4.8, rok: 2022
Způsob publikování: Omezený přístup
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JE006842

The high-energy-density synthesis of NxOy species is simulated in gas mixtures representing an O2-free early-Earth atmosphere by terawatt-kilojoule-class laser-induced dielectric breakdown (LIDB). These experiments differ from previous LIDB experiments due to the 100 times greater energy delivered per pulse and sensitive analysis of products by high-resolution infrared spectroscopy. The measured yields of NO, N2O, and NO2 are 0.08–8 × 1015, 5 × 1012, and 0.03–7 × 1014 molec J −1. The high N2O yield is above the upper-limit constraint of previous tabletop LIDB experiments and the expected yield of a thermochemical freeze-out at any temperature between 2000 and 5000 K, while the NO and NO2 yields are in broad agreement with freeze-out models. Using a one dimensional chemical model of the Hadean atmosphere and a simple model of late bombardment, we compute the source flux of N2O assuming the same high production yield as measured experimentally and find the steady-state partial pressure of N2O is insufficient to warm the climate.
Trvalý link: https://hdl.handle.net/11104/0349307