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Seasonal Variations of High-Frequency Gravity Wave Momentum Fluxes and Their Forcing toward Zonal Winds in the Mesosphere and Lower Thermosphere over Langfang, China (39.4° N, 116.7° E). ATMOSPHERE 2020. [DOI: 10.3390/atmos11111253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Meteor radar data collected over Langfang, China (39.4° N, 116.7° E) were used to estimate the momentum flux of short-period (less than 2 h) gravity waves (GWs) in the mesosphere and lower thermosphere (MLT), using the Hocking (2005) analysis technique. Seasonal variations in GW momentum flux exhibited annual oscillation (AO), semiannual oscillation (SAO), and quasi-4-month oscillation. Quantitative estimations of GW forcing toward the mean zonal flow were provided using the determined GW momentum flux. The mean flow acceleration estimated from the divergence of this flux was compared with the observed acceleration of zonal winds displaying SAO and quasi-4-month oscillations. These comparisons were used to analyze the contribution of zonal momentum fluxes of SAO and quasi-4-month oscillations to zonal winds. The estimated acceleration from high-frequency GWs was in the same direction as the observed acceleration of zonal winds for quasi-4-month oscillation winds, with GWs contributing more than 69%. The estimated acceleration due to Coriolis forces to the zonal wind was studied; the findings were opposite to the estimated acceleration of high-frequency GWs for quasi-4-month oscillation winds. The significance of this study lies in estimating and quantifying the contribution of the GW momentum fluxes to zonal winds with quasi-4-month periods over mid-latitude regions for the first time.
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Fritts DC, Smith SA, Balsley BB, Philbrick CR. Evidence of gravity wave saturation and local turbulence production in the summer mesosphere and lower thermosphere during the STATE experiment. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jd093id06p07015] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Murphy DJ, Vincent RA. Estimates of momentum flux in the mesosphere and lower thermosphere over Adelaide, Australia, from March 1985 to February 1986. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/93jd01861] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Miyoshi Y, Fujiwara H. Gravity Waves in the Thermosphere Simulated by a General Circulation Model. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd008874] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zink F, Vincent RA. Wavelet analysis of stratospheric gravity wave packets over Macquarie Island: 2. Intermittency and mean-flow accelerations. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000jd900846] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Smith SM, Mendillo M, Baumgardner J, Clark RR. Mesospheric gravity wave imaging at a subauroral site: First results from Millstone Hill. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999ja000343] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gardner CS, Gulati K, Zhao Y, Swenson G. Measuring gravity wave momentum fluxes with airglow imagers. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999jd900105] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Eckermann SD. On the observed morphology of gravity-wave and equatorial-wave variance in the stratosphere. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0021-9169(93)e0027-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Gravity-wave motions in the mesosphere and lower thermosphere observed at Mawson, Antarctica. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0021-9169(94)90100-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Akmaev R, Fomichev V, Gavrilov N, Shved G. Simulation of the zonal mean climatology of the middle atmosphere with a three-dimensional spectral model for solstice and equinox conditions. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/0021-9169(92)90120-a] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Eckermann SD. Ray-tracing simulation of the global propagation of inertia gravity waves through the zonally averaged middle atmosphere. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/92jd01410] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Czechowsky P, Reid IM, Rüster R, Schmidt G. VHF radar echoes observed in the summer and winter polar mesosphere over Andøya, Norway. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/jd094id04p05199] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Reid IM. Some aspects of Doppler radar measurements of the mean and fluctuating components of the wind field in the upper middle atmosphere. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0021-9169(87)90041-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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