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Thursday, May 7, 2020 | History

2 edition of Photochemical destabilization of gravity waves near the mesopause found in the catalog.

Photochemical destabilization of gravity waves near the mesopause

Conway B. Leovy

Photochemical destabilization of gravity waves near the mesopause

by Conway B. Leovy

  • 8 Want to read
  • 22 Currently reading

Published by Rand Corporation in Santa Monica, Calif .
Written in English

    Subjects:
  • Atmospheric waves.,
  • Gravity waves.

  • Edition Notes

    Bibliography: p. 43-44.

    StatementC.B. Leovy.
    SeriesMemorandum -- RM-4818-PR, Research memorandum (Rand Corporation) -- RM-4818-PR..
    The Physical Object
    Paginationv, 44 p. :
    Number of Pages44
    ID Numbers
    Open LibraryOL17984790M

    Anne K. Smith's 75 research works with 2, citations and 3, reads, including: Evaluation of the Mesospheric Polar Vortices in WACCM. The influence of gravity waves on photochemical heating in the mesopause region is studied in this paper. The results indicate that gravity waves can cause a loss of photochemical heating in the.

    select article Ionospheric effects of the solar flares of Septem and J as deduced from global GPS network data. Gravity waves may strongly modify the mean concentrations of atmospheric compounds near the mesopause, especially during nighttime (Hu et al., ). Xu () and Xu et al.() investigated the conditions under which gravity waves become unstable due to photochemical heating in the mesopause region.

    A temperature minimum of °C and lower is reached at ~85 km - the mesopause. Near here is the realm of the 'night shining' or noctilucent clouds. Beyond the mesopause temperatures rise again because of reduced radiative cooling combined with heating by absorption of short wavelength. Photochemical destabilization of gravity waves near the mesopause Some Aspects of the Circulation of Mars. Simple Models of Thermally Driven Mesospheric Circulation.


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Photochemical destabilization of gravity waves near the mesopause by Conway B. Leovy Download PDF EPUB FB2

Photochemical destabilization of gravity waves near the mesopause. by Conway B A number of possible interaction mechanisms between internal gravity waves and radiative and photochemical processes at altitudes from 80 to km are considered.

This could be brought about by large-scale descending motion or by increased mixing near the. A number of possible interaction mechanisms between internal gravity waves and radiative and photochemical processes at altitudes from 80 to km are considered. The heat of recombination of atomic oxygen and absorption of solar radiation by ozone are both found to Cited by: Xu (), with a more complete photochemical scheme, confirms the finding of Leovy that the photochemical process can lead to instability of gravity waves near the destabilizing effect of gravity waves is confined, however, to the mesopause region, where temperatures are by:   A number of possible interaction mechanisms between internal gravity waves and radiative and photochemical processes at altitudes from 80 to km are considered.

The heat of recombination of atomic oxygen and absorption of solar radiation by ozone are both found to contribute to wave amplification. Growth rates are slow under normal conditions but can become significant if the Cited by: However, the photochemistry has a destabilizing effect on gravity waves in the mesopause region.

The photochemical heating process can induce a comparatively strong enhancement of gravity waves. This paper investigates the conditions under which gravity waves become unstable due to photochemical heating in the mesopause region.

The study shows that the gravity wave growth rate induced by photochemistry is sensitive to the temperature and atomic oxygen concentration by: The studies in recent years indicate that the photochemical heating is one of the most important heating sources in mesosphere and thermosphere.

Leovy firstly pointed out that the photochemistry. Small‐scale gravity waves near the mesopause observed by four all‐sky airglow imagers. Ejiri. Japan, were analyzed to study the three‐dimensional structure of small‐scale gravity waves in the mesopause region.

Airglow images from the near‐infrared OH (layer height of ∼86 km) and O 2 (0, 1) (∼94 km) bands and the visible Cited by: 1 Introduction. Gravity waves (GWs) are believed to play an important role in driving the general circulation in the mesosphere and lower thermosphere (MLT) region through deposition of their momentum and energy into the mean flow [Vincent, ; Hamilton, ; Fritts and Alexander, ].GWs are mostly generated in the lower atmosphere and propagate upward with exponential.

The ring's mean motion was most likely caused by a large‐scale, inertia‐gravity wave with a vertical wavelength of ~16 km and an amplitude of ~30 m/s in the mesopause region.

1 Introduction [2] It is now known that atmospheric gravity waves play a major role in the dynamics of the mesopause and lower thermosphere (MLT) region [ Lindzen. A review of the limited knowledge of the large-scale general circulation of the atmosphere above the mesopause is attempted and some specific suggestions are made for tests of the present theories Leovy, C.

B., Photochemical destabilization of gravity waves near the mesopause. Atmos. Sci., 23, –Cited by: 7. The influence of gravity waves on photochemical heating in the mesopause region is studied in this paper.

The results indicate that gravity waves can cause a loss of photochemical heating in the region of the by: A photochemical‐dynamical gravity‐wave model is developed in this paper and is applied to the impact of a nonbreaking propagating gravity wave on chemical species distributions in the mesopause by: J.

Xu, A.K. Smith, G.P. BrasseurConditions for the photochemical destabilization of gravity waves in the mesopause region Journal of Atmospheric and Solar-Terrestrial Physics, 63 (), pp. Cited by: damp or enhance gravity waves and photochemistry could cause gravity waves destabilization near the altitude of mesopause.

The growth rate of gravity wave has a scale of about 3 × 10−6 s−1. Owing to this small growth rate, this process has not been paid serious attention. Xun Zhu and Holton () have investigated the damping effect of. Physics and chemistry of the mesopause region.

The second shows how transport of chemical species by gravity waves can alter the heating structure in such a way as to destabilize the gravity.

The radar measurements of the drag force near the mesopause produced by mesoscale gravity waves range from 10 to 20 m s −1 day −1 (e.g., Vincent and Reid ; Tsuda and Murayama ). Based on the wind measurements from HRDI, the drag force induced by the gravest symmetric propagating mode of the diurnal tide ranges from 5 to 15 m s −1 Cited by:   The results indicate that the photochemical heating process can induce the instability of gravity wave at mesopause.

The intensity of the instability becomes stronger as the temperature decreases. The temperature feature and the altitude characteristics of the instability Cited by: 4.

The calculations indicate that the effect of gravity waves on the distributions of atmospheric trace gases is mainly through the nonlinear photochemical reactions in the mesopause region. The contribution of the nonlinear photochemical reaction caused by gravity waves can exceed the nonlinear transportation and the eddy by: 1.

This paper focuses on the effect of diabatic processes due to photochemical heating on long-period gravity waves in the stratosphere, mesosphere and lower thermosphere. A linear diabatic gravity wave model is established and compared to a model of pure dynamical adiabatic gravity waves.

The results indicate that the photochemistry has a damping effect on gravity waves in most regions Cited by: 9. Numerical simulations of the interaction of transient, dissipating gravity wave packets with the minor species involved in the OH airglow chemistry in the mesopause region reveal large wave‐driven do Cited by: Vertical transport due to dissipating gravity waves and turbulence in the mesopause region ( km) are analyzed with observational data obtained from a narrow-band sodium wind/temperature lidar located at Andes Lidar Observatory (ALO), Cerro Pachon (´Author: Yafang Guo.

inertio‐gravity wave: radiative‐photochemical destabilization of inertio‐gravity waves near the mesopause: Lindzen: two‐layer, β‐plane, quasigeostrophic baroclinic wave: radiative‐photochemical destabilization of a baroclinic zonal current to baroclinic waves in the mesosphere: GruzdevCited by: