Characteristics of internal waves in the Martian atmosphere obtained on the basis of an analysis of vertical temperature profiles of the Mars Global Surveyor mission

Губенко, В. Н.; Kirillovich, I. A.; Pavelyev, A. G.

doi:10.1134/s0010952515020021

“…Мы разработали новый метод определения характеристик внутренних атмосферных волн, связанных с наклонными спорадическими структурами в ионосфере Земли. При восстановлении параметров ВГВ использовались базовые выражения (дисперсионное уравнение, поляризационные соотношения, определения волновых характеристик) для внутренних гравитационных волн [Gubenko et al, 2008Губенко, Кириллович, 2018;Губенко и др., 2012, 2016a. Этот метод позволяет исследовать взаимосвязи между мелкомасштабными внутренними волнами и E s -слоями в ионосфере Земли и существенно расширяет возможности традиционного радиозатменного мониторинга атмосферы .…”

Section: модуляция структуры E S -слоев внутренними атмосферными волнамиunclassified

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Губенко¹,

Kirillovich²

2019

Solnechno-Zemnaya Fizika

0

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We have used radio occultation measurements of the satellite CHAMP (Challenging Minisatellite Payload) to examine sporadic E layers (altitudes 90–130 km) in Earth’s high-latitude ionosphere. We have developed a new method for determining characteristics of internal atmospheric waves based on the use of inclined sporadic E layers of Earth’s ionosphere as a detector. The method relies on the fact that an internal wave propagating through the initially horizontal sporadic E layer causes the plasma density gradient to rotate in the direction of the wave vector, which leads to the fact that the layer ionization plane is set parallel to the phase wave front. The developed method enables us to study the interrelations between small-scale internal waves and sporadic E layers in Earth’s ionosphere and significantly expands the capabilities of traditional radio occultation monitoring of the atmosphere. We have found that the internal atmospheric waves under study have periods from 35 to 46 min and vertical phase speeds from 1.2 to 2.0 m/s, which are in good agreement with the results of independent experiments and simulation data on sporadic E layers at a height of ~100 km in Earth’s polar cap.

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“…We have developed a new method for determining characteristics of internal atmospheric waves associated with inclined sporadic structures in Earth's ionosphere. When restoring IGW parameters, we used the fundamental expressions (dispersion equation, polarization relationships, and definitions of wave characteristics) for IGWs [Gubenko et al, 2008[Gubenko et al, , 2012[Gubenko et al, , 2015[Gubenko et al, , 2016a. This method allows us to examine the relationships between small-scale internal waves and E s layers in Earth's ionosphere and significantly expands the capabilities of the traditional radio occultation monitoring of the atmosphere .…”

Section: Modulation Of the Structure Of E S Layers By Internal Atmospmentioning

confidence: 99%

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Губенко

¹

,

Kirillovich

²

2019

Solar-Terrestrial Physics

7

0

View full text Add to dashboard Cite

We have used radio occultation measurements of the satellite CHAMP (Challenging Minisatellite Payload) to examine sporadic E layers (altitudes 90–130 km) in Earth’s high-latitude ionosphere. We have developed a new method for determining characteristics of internal atmospheric waves based on the use of inclined sporadic E layers of Earth’s ionosphere as a detector. The method relies on the fact that an internal wave propagating through the initially horizontal sporadic E layer causes the plasma density gradient to rotate in the direction of the wave vector, which leads to the fact that the layer ionization plane is set parallel to the phase wave front. The developed method enables us to study the interrelations between small-scale internal waves and sporadic E layers in Earth’s ionosphere and significantly expands the capabilities of traditional radio occultation monitoring of the atmosphere. We have found that the internal atmospheric waves under study have periods from 35 to 46 min and vertical phase speeds from 1.2 to 2.0 m/s, which are in good agreement with the results of independent experiments and simulation data on sporadic E layers at a height of ~100 km in Earth’s polar cap.

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“…If an axis of the coordinate system is selected in the direction of the horizontal wave vector component k h , the polarization relations take a simple form [Zink, Vincent, 2001;Gubenko et al, 2008bGubenko et al, , 2011Gubenko et al, , 2012…”

Section: Theoretical Relations and Hodograph Methodsmentioning

confidence: 99%

“…If hydrostatic regime conditions hold for internal waves: [Fritts, Alexander, 2003;Gubenko et al, 2008bGubenko et al, , 2011Gubenko et al, , 2012:…”

Section: Theoretical Relations and Hodograph Methodsmentioning

confidence: 99%

“…Since IGW represent a characteristic feature of a stably stratified atmosphere, similar effects can occur in the atmospheres of Venus and Mars. Internal waves in the Martian atmosphere are thought to play a more important role than those in Earth's atmosphere because in many cases the IGW amplitudes in the Martian atmosphere are much higher than their terrestrial counterparts [Creasey et al, 2006;Gubenko et al, 2008aGubenko et al, , 2012Gubenko et al, , 2015Gubenko et al, , 2016a.…”

Section: Introductionmentioning

confidence: 99%

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Diagnostics of internal atmospheric wave saturation and determination of their characteristics in Earth's stratosphere from radiosonde measurements

Губенко

¹

,

Kirillovich

²

2018

Solar-Terrestrial Physics

7

0

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Abstract. Internal gravity waves (IGW) significantly affect the structure and circulation of Earth's atmosphere by transporting wave energy and momentum upward from the lower atmosphere. Since IGW can propagate freely through a stably stratified atmosphere, similar effects may occur in the atmospheres of Mars and Venus. Observations of temperature and wind speed fluctuations induced by internal waves in Earth's atmosphere have shown that wave amplitudes increase with height, but not quickly enough to correspond to the amplitude increase due to an exponential decrease in the density without energy dissipation. The linear theory of IGW explains the wave amplitude growth rate as follows: any wave amplitude exceeding the threshold value leads to instability and produces turbulence, which hinders further amplitude growth (internal wave saturation). The mechanisms that contribute most to the energy dissipation and saturation of IGW in the atmosphere are thought to be the dynamical (shear) and convective instabilities. The assumption of internal wave saturation plays a key role in radio occultation monitoring of IGW in planetary atmospheres. A radiosonde study of wave saturation processes in Earth's atmosphere is therefore actual and important task. We report the results of determination of actual and threshold amplitudes, saturation degree, and other characteristics for the identified IGW in Earth's atmosphere obtained from the analysis of SPARC (Stratospheric Processes And their Role in Climate) radiosonde measurements of wind speed and temperature [http://www.sparc.sunysb.edu/].

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Characteristics of internal waves in the Martian atmosphere obtained on the basis of an analysis of vertical temperature profiles of the Mars Global Surveyor mission

Cited by 14 publications

References 13 publications

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Modulation of sporadic E layers by small-scale atmospheric waves in Earth’s high-latitude ionosphere

Diagnostics of internal atmospheric wave saturation and determination of their characteristics in Earth's stratosphere from radiosonde measurements

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