Gravity wave climatology and trends in the mesosphere/lower thermosphere region deduced from low-frequency drift measurements 1984-2003 (52.1°N, 13.2°E)

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Gravity wave climatology and trends in the mesosphere/lower thermosphere region deduced from low-frequency drift measurements 1984-2003 (52.1°N, 13.2°E). / Jacobi, Christoph; Gavrilov, Nikolai M.; Kürschner, Dierk; Fröhlich, Kristina.

в: Journal of Atmospheric and Solar-Terrestrial Physics, Том 68, № 17, 12.2006, стр. 1913-1923.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{98d5afabd5604b67b94c10b4bcdde856,

title = "Gravity wave climatology and trends in the mesosphere/lower thermosphere region deduced from low-frequency drift measurements 1984-2003 (52.1°N, 13.2°E)",

abstract = "Fluctuations of lower ionospheric drifts in the virtual height range 85-110 km at 52.1°N, 13.2°E during 1984-2003 are presented. These fluctuations may be partly owing to neutral atmosphere gravity waves in the period window 0.7-3 h. The results show maximum wave activity in the mesosphere in summer, with a shift to equinoxes at higher altitudes. Maximum gravity wave amplitudes are found near the regions of strongest vertical mean wind shear. The propagation direction is generally close to E-W, however, during winter at lower heights a more South-Easterly direction is preferred, while at greater heights during summer a North-Easterly direction is visible. Time series of seasonal (3-monthly) mean zonal drift variances show maximum amplitudes around years 1989-1991 and 2000-2002, when maxima of solar activity within the 11-year solar cycle occurred. We interpret the results in terms of gravity wave activity although additional influences like ionospheric perturbations also may lead to possible wind fluctuations correlated with solar activity. Therefore, the conclusions are partly qualitative and require further experimental verification.",

keywords = "Gravity waves, Lower ionosphere, Middle atmosphere, Wind measurements",

author = "Christoph Jacobi and Gavrilov, {Nikolai M.} and Dierk K{\"u}rschner and Kristina Fr{\"o}hlich",

note = "Funding Information: This study has been partly supported by INTAS under grant INTAS 03-51-5380 and by Deutsche Forschungsgemeinschaft under grant JA 836/21-1. ",

year = "2006",

month = dec,

doi = "10.1016/j.jastp.2005.12.007",

language = "English",

volume = "68",

pages = "1913--1923",

journal = "Journal of Atmospheric and Solar-Terrestrial Physics",

issn = "1364-6826",

publisher = "Elsevier",

number = "17",

}

RIS

TY - JOUR

T1 - Gravity wave climatology and trends in the mesosphere/lower thermosphere region deduced from low-frequency drift measurements 1984-2003 (52.1°N, 13.2°E)

AU - Jacobi, Christoph

AU - Gavrilov, Nikolai M.

AU - Kürschner, Dierk

AU - Fröhlich, Kristina

N1 - Funding Information: This study has been partly supported by INTAS under grant INTAS 03-51-5380 and by Deutsche Forschungsgemeinschaft under grant JA 836/21-1.

PY - 2006/12

Y1 - 2006/12

N2 - Fluctuations of lower ionospheric drifts in the virtual height range 85-110 km at 52.1°N, 13.2°E during 1984-2003 are presented. These fluctuations may be partly owing to neutral atmosphere gravity waves in the period window 0.7-3 h. The results show maximum wave activity in the mesosphere in summer, with a shift to equinoxes at higher altitudes. Maximum gravity wave amplitudes are found near the regions of strongest vertical mean wind shear. The propagation direction is generally close to E-W, however, during winter at lower heights a more South-Easterly direction is preferred, while at greater heights during summer a North-Easterly direction is visible. Time series of seasonal (3-monthly) mean zonal drift variances show maximum amplitudes around years 1989-1991 and 2000-2002, when maxima of solar activity within the 11-year solar cycle occurred. We interpret the results in terms of gravity wave activity although additional influences like ionospheric perturbations also may lead to possible wind fluctuations correlated with solar activity. Therefore, the conclusions are partly qualitative and require further experimental verification.

AB - Fluctuations of lower ionospheric drifts in the virtual height range 85-110 km at 52.1°N, 13.2°E during 1984-2003 are presented. These fluctuations may be partly owing to neutral atmosphere gravity waves in the period window 0.7-3 h. The results show maximum wave activity in the mesosphere in summer, with a shift to equinoxes at higher altitudes. Maximum gravity wave amplitudes are found near the regions of strongest vertical mean wind shear. The propagation direction is generally close to E-W, however, during winter at lower heights a more South-Easterly direction is preferred, while at greater heights during summer a North-Easterly direction is visible. Time series of seasonal (3-monthly) mean zonal drift variances show maximum amplitudes around years 1989-1991 and 2000-2002, when maxima of solar activity within the 11-year solar cycle occurred. We interpret the results in terms of gravity wave activity although additional influences like ionospheric perturbations also may lead to possible wind fluctuations correlated with solar activity. Therefore, the conclusions are partly qualitative and require further experimental verification.

KW - Gravity waves

KW - Lower ionosphere

KW - Middle atmosphere

KW - Wind measurements

UR - http://www.scopus.com/inward/record.url?scp=33751207696&partnerID=8YFLogxK

U2 - 10.1016/j.jastp.2005.12.007

DO - 10.1016/j.jastp.2005.12.007

M3 - Article

AN - SCOPUS:33751207696

VL - 68

SP - 1913

EP - 1923

JO - Journal of Atmospheric and Solar-Terrestrial Physics

JF - Journal of Atmospheric and Solar-Terrestrial Physics

SN - 1364-6826

IS - 17

ER -

ID: 99381240