Nonlinear acoustic waves in the viscous thermosphere and ionosphere above earthquake

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00468191" target="_blank" >RIV/68378289:_____/16:00468191 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2016JA023450" target="_blank" >http://dx.doi.org/10.1002/2016JA023450</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2016JA023450" target="_blank" >10.1002/2016JA023450</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear acoustic waves in the viscous thermosphere and ionosphere above earthquake

Popis výsledku v původním jazyce

The nonlinear behavior of acoustic waves and their dissipation in the upper atmosphere is studied on the example of infrasound waves generated by vertical motion of the ground surface during the Mw 8.3 earthquake that occurred about 46km from Illapel, Chile on 16 September 2015. To conserve energy, the amplitude of infrasound waves initially increased as the waves propagated upward to the rarefied air.When the velocities of air particles became comparable with the local sound speed, the nonlinear effects started to play an important role. Consequently, the shape of waveform changed significantly with increasing height, and the original wave packet transformed to the “N‐shaped pulse resembling a shock wave. A unique observation by the continuous Doppler sounder at the altitude of about 195km is in good agreement with full wave numerical simulation that uses as boundary condition the measured vertical motion of the ground surface.

Název v anglickém jazyce

Nonlinear acoustic waves in the viscous thermosphere and ionosphere above earthquake

Popis výsledku anglicky

The nonlinear behavior of acoustic waves and their dissipation in the upper atmosphere is studied on the example of infrasound waves generated by vertical motion of the ground surface during the Mw 8.3 earthquake that occurred about 46km from Illapel, Chile on 16 September 2015. To conserve energy, the amplitude of infrasound waves initially increased as the waves propagated upward to the rarefied air.When the velocities of air particles became comparable with the local sound speed, the nonlinear effects started to play an important role. Consequently, the shape of waveform changed significantly with increasing height, and the original wave packet transformed to the “N‐shaped pulse resembling a shock wave. A unique observation by the continuous Doppler sounder at the altitude of about 195km is in good agreement with full wave numerical simulation that uses as boundary condition the measured vertical motion of the ground surface.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

<a href="/cs/project/GC15-07281J" target="_blank" >GC15-07281J: Jevy spojující neutrální a ionizovanou atmosféru</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

12126-12137

Kód UT WoS článku

000393183300036

EID výsledku v databázi Scopus

2-s2.0-85009177462