Hough components of water vapour heating

Groves, G. V.

doi:10.1016/0021-9169(82)90033-2

Cited by 84 publications

(63 citation statements)

References 21 publications

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“…MSISE-90 zonal mean temperatures (Hedin, 1991), Groves (1985Groves ( , 1987) semi-empirical model of tropospheric winds, and HRDI 6-year monthly averaged zonal mean zonal wind climatologies are used to specify GSWM background atmosphere. Migrating tidal forcing is parameterized by Groves (1982) in the troposphere, while HALOE/MLS 6-year monthly averaged ozone climatologies and the Strobel (1978) scheme are used to account for strato-mesospheric heating. GSWM includes molecular and eddy diffusivity effects, an effective Rayleigh friction to account for GW stress, and parameterizations for ion drag and Newtonian cooling effects.…”

Section: Gswm Qbo Experimentsmentioning

confidence: 99%

QBO effects on the diurnal tide in the upper atmosphere

et al. 2014

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We report on a series of numerical experiments conducted with the global-scale wave model (GSWM) and designed to investigate the effects of the quasi-biennial oscillation (QBO) on the migrating diurnal tide. Our results indicate that the diurnal tidal response in the upper mesosphere and lower thermosphere (MLT) is significantly affected by the QBO in zonal mean zonal winds, but largely insensitive to the QBO in stratospheric ozone. We discuss the variable mean wind results in light of previous analytic attempts to describe the diurnal tide in the presence of mean winds and dissipation. Our calculations do not explain the interannual tidal variations observed by the High Resolution Doppler Interferometer (HRDI) on the Upper Atmosphere Research Satellite (UARS).

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Section: Gswm Qbo Experimentsmentioning

confidence: 99%

QBO effects on the diurnal tide in the upper atmosphere

et al. 2014

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“…These are the middle months of the traditional seasons used here and elsewhere; for the northern hemisphere, winter (DJF); spring (MAM); summer (JJA); Autumn or Fall (SON). This monthly extension to the model capabilities is based on the assumption that it is reasonable to estimate monthly variations in tropospheric tidal forcing by interpolating between the 3-month average seasonal heating rates, parameterized by Groves (1982) and invoked in both GSWM and GSWM1998. Otherwise, the assumptions invoked in GSWM2000 are identical to those that characterized GSWM1998 with the single exception of the ozone model used to parameterize strato-mesopheric migrating tidal forcing.…”

Section: The Models: Gswm Gswm2000; Cmammentioning

confidence: 99%

“…Both models use mean temperatures and densities from Hedin (1991), the same winds below 12 km (Groves, 1985(Groves, , 1987 and tropospheric migrating tidal forcing (Groves, 1982). However while GSWM used middle atmosphere winds from Groves (1985Groves ( , 1987 and an empirical wind-model due to Portnyagin and Solov'era (1992a, b), the latest GSWM versions (1998,2000) use UARS-HRDI (High Resolution Doppler Interferometer) winds after Burrage et al, 1996).…”

Section: The Models: Gswm Gswm2000; Cmammentioning

confidence: 99%

Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM)

Manson

Meek²,

Hagan³

et al. 2002

Ann. Geophys.

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Abstract. In an earlier paper (Manson et al., 1999a) tidal data (1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997) Here the data set is increased by the addition of two locations in the Pacific-North American sector: Yamagawa 31 • N, and Wakkanai 45 • N. The GSWM model has undergone two additional developments (1998, 2000) to include an improved gravity wave (GW) stress parameterization, background winds from UARS systems and monthly tidal forcing for better characterization of seasonal change. The other model, the Canadian Middle Atmosphere Model (CMAM) which is a General Circulation Model, provides internally generated forcing (due to ozone and water vapour) for the tides.The two GSWM versions show distinct differences, with the 2000 version being either closer to, or further away from, the observations than the original 1995 version. CMAM provides results dependent upon the GW parameterization Correspondence to: A. H. Manson (manson@dansas.usask.ca) scheme inserted, but one of the schemes provides very useful tides, especially for the semi-diurnal component.

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“…For all the seasons, only one simulation was done using an average diurnal heating rate for different heat sources. As discussed above for the present simplified simulation, only migrating modes (1, 1, 1), (1, 1, −2), (1 ,1, −4), (1, 1, −6), (1, 1, −1), (1, 1, −3), (1, 1, 3) and (1, 1, 2) were used for water vapour heating rates taken from Groves (1982a). For planetary boundary layer (PBL) heating, westward and eastward travelling non-migrating modes (1, 5, 5), (1, 5, 6), (1, 5, 7), (1,5,8), (1,5,10), (1,5,16), (1, −3, 3) (1, −3, 4) and (1, −3, 5) were used.…”

Section: Simulation Of Tidal Fields Using Classical Tidal Theorymentioning

confidence: 99%

Tidal wind oscillations in the tropical lower atmosphere as observed by Indian MST Radar

2001

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Abstract. Diurnal tidal components in horizontal winds measured by MST radar in the troposphere and lower stratosphere over a tropical station Gadanki (13.5 • N, 79.2 • E) are presented for the autumn equinox, winter, vernal equinox and summer seasons. For this purpose radar data obtained over many diurnal cycles from September 1995 to August 1996 are used. The results obtained show that although the seasonal variation of the diurnal tidal amplitudes in zonal and meridional winds is not strong, vertical phase propagation characteristics show significant seasonal variation. An attempt is made to simulate the diurnal tidal amplitudes and phases in the lower atmosphere over Gadanki using classical tidal theory by incorporating diurnal heat sources, namely, solar radiation absorption by water vapour, planetary boundary layer (PBL) heat flux, latent heat release in deep convective clouds and short wave solar radiation absorption by clouds. A comparison of the simulated amplitudes and phases with the observed ones shows that agreement between the two is quite good for the equinox seasons, especially the vertical structure of the phases of the meridional wind components.

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Hough components of water vapour heating

Cited by 84 publications

References 21 publications

QBO effects on the diurnal tide in the upper atmosphere

QBO effects on the diurnal tide in the upper atmosphere

Seasonal variations of the semi-diurnal and diurnal tides in the MLT: multi-year MF radar observations from 2–70° N, modelled tides (GSWM, CMAM)

Tidal wind oscillations in the tropical lower atmosphere as observed by Indian MST Radar

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