Large-Scale and Transient Disturbances and Trends: From the Ground to the Ionosphere

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Large-Scale and Transient Disturbances and Trends: From the Ground to the Ionosphere

Popis výsledku v původním jazyce

Infrasonic waves excited at surface or in the troposphere propagate to longer distances via reflections from the middle and upper stratosphere or the lower thermosphere. They affect to some extent also the ionosphere, which is rather little known. These regions are affected by large scale and transient disturbances, and by long-term changes and trends. A brief review is given with particular emphasis on the stratosphere, lower thermosphere and ionosphere. The impact of such disturbances and long-term trends on the propagation of infrasonic waves is qualitatively estimated.nTwo dominant disturbances of solar origin, which substantially affect the atmosphere and particularly the ionosphere, are solar flares and geomagnetic storms. Atmospheric waves, namely gravity waves, planetary waves and tidal waves, affect both regions of infrasound reflections. The major midwinter stratospheric warming has pronounced effect on the height profile of temperature, thus they are capable to significantly affect propagation of infrasonic waves. There are also sporadic effects like earthquakes, which excite infrasound and gravity waves, but their overall impact on infrasound propagation is small. The impact of atmospheric waves is smaller than that of some sporadic effects like the major stratospheric warmings but atmospheric waves are continuously present in the atmosphere.nBoth the stratosphere and thermosphere experience also long-term changes and trends, in recent decades of predominantly anthropogenic origin (greenhouse effect, ozone depletion). These long-term changes are small but continuous, so they do not affect behavior of infrasonic waves on short-term scales but might have some effect on long-term scales like changes from decade to decade.

Název v anglickém jazyce

Large-Scale and Transient Disturbances and Trends: From the Ground to the Ionosphere

Popis výsledku anglicky

Infrasonic waves excited at surface or in the troposphere propagate to longer distances via reflections from the middle and upper stratosphere or the lower thermosphere. They affect to some extent also the ionosphere, which is rather little known. These regions are affected by large scale and transient disturbances, and by long-term changes and trends. A brief review is given with particular emphasis on the stratosphere, lower thermosphere and ionosphere. The impact of such disturbances and long-term trends on the propagation of infrasonic waves is qualitatively estimated.nTwo dominant disturbances of solar origin, which substantially affect the atmosphere and particularly the ionosphere, are solar flares and geomagnetic storms. Atmospheric waves, namely gravity waves, planetary waves and tidal waves, affect both regions of infrasound reflections. The major midwinter stratospheric warming has pronounced effect on the height profile of temperature, thus they are capable to significantly affect propagation of infrasonic waves. There are also sporadic effects like earthquakes, which excite infrasound and gravity waves, but their overall impact on infrasound propagation is small. The impact of atmospheric waves is smaller than that of some sporadic effects like the major stratospheric warmings but atmospheric waves are continuously present in the atmosphere.nBoth the stratosphere and thermosphere experience also long-term changes and trends, in recent decades of predominantly anthropogenic origin (greenhouse effect, ozone depletion). These long-term changes are small but continuous, so they do not affect behavior of infrasonic waves on short-term scales but might have some effect on long-term scales like changes from decade to decade.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Infrasound Monitoring for Atmospheric Studies: Challenges in Middle Atmosphere Dynamics and Societal Benefits

ISBN

978-3-319-75138-2

Počet stran výsledku

38

Strana od-do

777-804

Počet stran knihy

1167

Název nakladatele

Springer International Publishing

Místo vydání

Cham

Kód UT WoS kapitoly

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