Mesospheric gravity waves and ionospheric plasma bubbles observed during the COPEX campaign

Paulino, Igo; Takahashi, H.; Medeiros, A. F.; Wrasse, C. M.; Buriti, R. A.; Sobral, J. H. A.; Gobbi, D.

doi:10.1016/j.jastp.2010.12.004

Cited by 28 publications

(20 citation statements)

References 54 publications

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“…Interestingly, from Gadanki measurements, on 17-18 March 2012 (which is just 1 day earlier than the case presented in this report), Taori et al [2013] showed the occurrence of EPBs with periodic spacing in the EPB structures having a close correspondence with the wavelengths noted in the upper mesospheric waves. Apart from these investigations over Indian sector, there had been reports suggesting a correlation between the horizontal wavelengths monitored in the OH emission data and the interdepletion distances measured in O( 1 D) emission data [e.g., Paulino et al, 2011]. The imager data from Gadanki as well as Kolhapur do not reveal any wave event at OH as well as O( 1 S) data which represent~87 and 97 km altitudes.…”

Section: Probable Cause Of the Epb Eventmentioning

confidence: 93%

Probing the possible trigger mechanisms of an equatorial plasma bubble event based on multistation optical data

Taori

Parihar²,

Ghodpage

et al. 2015

JGR Space Physics

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We analyze an equatorial plasma bubble (EPB) event observed in optical 630 nm image data simultaneously from Gadanki (13.5°N, 79.2°E), Kolhapur (16.8°N, 74.2°E), India. The total electron content data from Gadanki together with the ionosonde data from an equatorial Indian station, Tirunelveli (8.7°N, 77.8°E) confirmed the association of observed EPB event with equatorial spread F (ESF). The optical 630 nm images from a farther low‐latitude Indian station Ranchi (23.3°N, 85.3°E) show clear signatures of tilted east‐west wave structures propagating toward equator. Further, the upward wave energy noted in mesospheric airglow data was found to be negligible. These data suggest that possibly the off‐equatorial tilted east‐west structures triggered the observed EPB/ESF event.

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Section: Probable Cause Of the Epb Eventmentioning

confidence: 93%

Probing the possible trigger mechanisms of an equatorial plasma bubble event based on multistation optical data

Taori

Parihar²,

Ghodpage

et al. 2015

JGR Space Physics

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“…These results suggest that the periodic spacing of plasma bubbles are determined by GWs in the lower thermosphere. Several other studies also suggest seeding of plasma bubbles by GWs in the lower thermosphere (e.g., Taori et al 2010Taori et al , 2011Paulino et al 2011).…”

Section: Progress Of Understanding For Plasma Bubble Seeding By Gwsmentioning

confidence: 89%

The geospace response to variable inputs from the lower atmosphere: a review of the progress made by Task Group 4 of CAWSES-II

Oberheide

Shiokawa

Gurubaran

et al. 2015

Prog. in Earth and Planet. Sci.

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The advent of new satellite missions, ground-based instrumentation networks, and the development of whole atmosphere models over the past decade resulted in a paradigm shift in understanding the variability of geospace, that is, the region of the atmosphere between the stratosphere and several thousand kilometers above ground where atmosphere-ionosphere-magnetosphere interactions occur. It has now been realized that conditions in geospace are linked strongly to terrestrial weather and climate below, contradicting previous textbook knowledge that the space weather of Earth's near space environment is driven by energy injections at high latitudes connected with magnetosphere-ionosphere coupling and solar radiation variation at extreme ultraviolet wavelengths alone. The primary mechanism through which energy and momentum are transferred from the lower atmosphere is through the generation, propagation, and dissipation of atmospheric waves over a wide range of spatial and temporal scales including electrodynamic coupling through dynamo processes and plasma bubble seeding. The main task of Task Group 4 of SCOSTEP's CAWSES-II program, 2009 to 2013, was to study the geospace response to waves generated by meteorological events, their interaction with the mean flow, and their impact on the ionosphere and their relation to competing thermospheric disturbances generated by energy inputs from above, such as auroral processes at high latitudes. This paper reviews the progress made during the CAWSES-II time period, emphasizing the role of gravity waves, planetary waves and tides, and their ionospheric impacts. Specific campaign contributions from Task Group 4 are highlighted, and future research directions are discussed.

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“…For this study we used the keogram analysis to obtain the horizontal wave parameters such as the horizontal wavelength, the period and the direction of propagation of the wave observed by the photometer. Details on the methodology of the keogram analysis can be found in Paulino et al (2011), with more details in Figueiredo et al (2018). The co-located meteor radar is operated in a routine base providing information on zonal and meridional wind velocities which aided in the estimation of the intrinsic wave frequency.…”

Section: All-sky Imagementioning

confidence: 99%

Determination of gravity wave parameters in the airglow combining photometer and imager data

et al. 2018

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Abstract. Mesospheric airglow measurements of two or three layers were used to characterize both vertical and horizontal parameters of gravity waves. The data set was acquired coincidentally from a multi-channel filter (Multi-3) photometer and an all-sky imager located at São João do Cariri (7.4 • S, 36.5 • W) in the equatorial region from 2001 to 2007. Using a least-square fitting and wavelet analysis technique, the phase and amplitude of each observed wave were determined, as well as the amplitude growth. Using the dispersion relation of gravity waves, the vertical and horizontal wavelengths were estimated and compared to the horizontal wavelength obtained from the keogram analysis of the images observed by an all-sky imager. The results show that both horizontal and vertical wavelengths, obtained from the dispersion relation and keogram analysis, agree very well for the waves observed on the nights of 14 October and 18 December 2006. The determined parameters showed that the observed wave on the night of 18 December 2006 had a period of ∼ 43.8 ± 2.19 min, with the horizontal wavelength of 235.66 ± 11.78 km having a downward phase propagation, whereas that of 14 October 2006 propagated with a period of ∼ 36.00 ± 1.80 min with a horizontal wavelength of ∼ 195 ± 9.80 km, and with an upward phase propagation. The observation of a wave taken by a photometer and an allsky imager allowed us to conclude that the same wave could be observed by both instruments, permitting the investigation of the two-dimensional wave parameter.

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Mesospheric gravity waves and ionospheric plasma bubbles observed during the COPEX campaign

Cited by 28 publications

References 54 publications

Probing the possible trigger mechanisms of an equatorial plasma bubble event based on multistation optical data

Probing the possible trigger mechanisms of an equatorial plasma bubble event based on multistation optical data

The geospace response to variable inputs from the lower atmosphere: a review of the progress made by Task Group 4 of CAWSES-II

Determination of gravity wave parameters in the airglow combining photometer and imager data

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