Lunar tide in the equatorial <i>F</i> region vertical ion drift velocity

Stening, R. J.; Fejer, Bela G.

doi:10.1029/2000ja000175

Cited by 38 publications

(46 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The JULIA data indicate the daytime lunar semimonthly perturbation drifts do not have significant solar flux dependence, as reported previously by Stening and Fejer [2001]. showed during January-February, when the lunar semimonthly effects are the strongest, the daytime drifts decrease by about 2 m/s from early morning to late afternoon.…”

Section: Luni-solar Semimonthly Tidal Effectssupporting

confidence: 64%

“…This is especially true during the super fountain effect and prompt penetration electric winter [Stening and Fejer, 2001]. Large oscillations with two-day and longer periods (5-, 10-, 16-day) were identified in the intensity of the equatorial electrojet and ionization anomaly.…”

Section: Ionospheric Weathermentioning

confidence: 99%

“…Note, the phase progression we found during the autumnal equinox is different than the rest of the data analyzed here. As Stening and Fejer [2001] fixed the phase progression (slope) and then found the amplitude and phase (intercept), this could explain the smaller amplitudes obtained by them during this time period. …”

Section: Luni-solar Semimonthly Tidal Effectsmentioning

confidence: 99%

“…The electrojet horizontal drifts are proportional to the F-region vertical plasma drifts and zonal electric field [e.g., Kelley, 2009]. The lunar semidiurnal tidal effects on the vertical drifts over Jicamarca were studied by Stening and Fejer [2001]. They found the effects were season dependent being strongest in December solstice and the effects were independent of solar flux.…”

Section: A(t)sin[2(t-ν)]+b(t)cos[2(t-ν)] and (6) C(t)sin(t-ν)+d(t)comentioning

confidence: 99%

See 3 more Smart Citations

Lunar tidal effects in the electrodynamics of the low latitude ionosphere

Fejer

Tracy

2013

Journal of Atmospheric and Solar-Terrestrial Physics

Self Cite

View full text Add to dashboard Cite

respectively. The monthly and semimonthly amplitudes decrease from early morning to afternoon and evening to morning with moderate to large increases near dusk and dawn.We also examined these perturbation drifts during periods of sudden stratospheric warmings (SSWs). Our results show, for the first time, the enhancements of the lunar semimonthly tidal effects associated with SSWs to occur at night, as well as during the day. Our results also indicate during SSWs, monthly tidal effects are not enhanced as strongly as the semimonthly effects. We also examined these perturbation drifts during periods of sudden stratospheric warmings (SSWs), which is a meteorological event where the polar vortex is displaced or splits and which has been known to be associated with a large increase in planetary wave activity. Our results show, for the first time, the enhancements of the lunar semimonthly tidal effects associated with SSWs to occur at night, as well as during the day. Our results also indicate during SSWs monthly tidal effects are not enhanced as strongly as the semimonthly effects.vii ACKNOWLEDGMENTS

show abstract

Section: Luni-solar Semimonthly Tidal Effectssupporting

confidence: 64%

Section: Ionospheric Weathermentioning

confidence: 99%

Section: Luni-solar Semimonthly Tidal Effectsmentioning

confidence: 99%

Section: A(t)sin[2(t-ν)]+b(t)cos[2(t-ν)] and (6) C(t)sin(t-ν)+d(t)comentioning

confidence: 99%

See 2 more Smart Citations

Lunar tidal effects in the electrodynamics of the low latitude ionosphere

Fejer

Tracy

2013

Journal of Atmospheric and Solar-Terrestrial Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The lunar E region dynamo also generates electrostatic fields and it is these fields, when transmitted along magnetic field lines to the F region, which give rise to the lunar periodicities in the F region ionization density and thus in the F region critical frequency (Stening, 1986). An oscillation signal at the lunar period has also been found in the parameters of the Es and F2 regions (Stening, 1999;Stening and Fejer, 2001).…”

Section: Introductionmentioning

confidence: 80%

A measurement of the lunar semidiurnal tide at Wuhan (30°40′N, 114°30′E)

et al. 2007

View full text Add to dashboard Cite

Upper atmospheric winds have been measured at heights from 80 to 100 km over Wuhan (30 • 40 N, 114 • 30 E), China with a meteor radar from 2002 to 2005. The variations of lunar semidiurnal tidal amplitudes and phases with both seasons and heights are studied in detail to reveal the properties of the lunar semidiurnal tide. It is shown that the lunar semidiurnal tide is stronger in January than other months, and its second peak appears near August. For most months the eastward maximum is 3 ± 1 lunar hours later than the northward maximum, as classical theory predicts for a northern hemisphere tide. The observed seasonal and height variations are also compared with the Global Scale Wave Model (GSWM). The phases do not agree well with those of the GSWM model. The maximum amplitude occurs in a different month in the model. There are about 5 lunar hours phase difference between the observed and the model at 90 and 96 km in eastward and northward components. A comparison of the lunar and solar semidiurnal tides is also shown in this paper. The behavior of these two tides in season is different, especially for the month of appearance of maximum amplitude.

show abstract

Large lunar tidal effects in the equatorial electrojet during northern winter and its relation to stratospheric sudden warming events

Yamazaki

2013

JGR Space Physics

View full text Add to dashboard Cite

[1] It has been known for many decades that lunar tidal effects in the equatorial electrojet are greatest during northern winter; the mechanism of which has never been identified. Recent findings of the lunar tidal amplification during stratospheric sudden warming (SSW) events raise the question: To what extent do SSWs contribute to the large lunar tide during northern winter? We use ground magnetometer data at Addis Ababa for the years 1958-2007 to determine the average M 2 lunar tide in the equatorial electrojet at different seasons. When all the data are included, the amplitude of the lunar tide is largest during northern winter. However, when only the data for non-SSW winters are used, the amplitude during northern winter is not significantly larger than during other seasons. The M 2 amplitude during SSW events is approximately 3 times as large as that for non-SSW winters, and it considerably increases the amplitude of the average lunar tide during northern winter. The M 2 phase is not significantly affected by SSW events. These results indicate that the occurrence of SSW events significantly modulates the seasonal pattern of lunar tidal effects on the ionosphere.Citation: Yamazaki, Y. (2013), Large lunar tidal effects in the equatorial electrojet during northern winter and its relation to stratospheric sudden warming events,

show abstract

Lunar tide in the equatorial F region vertical ion drift velocity

Abstract: Abstract. Vertical ion drift velocity data from

Cited by 38 publications

References 11 publications

Lunar tidal effects in the electrodynamics of the low latitude ionosphere

Lunar tidal effects in the electrodynamics of the low latitude ionosphere

A measurement of the lunar semidiurnal tide at Wuhan (30°40′N, 114°30′E)

Large lunar tidal effects in the equatorial electrojet during northern winter and its relation to stratospheric sudden warming events

Contact Info

Product

Resources

About