Tidal and gravity waves study from the airglow measurements at Kolhapur (India)

Ghodpage, R. N.; Siingh, Devendraa; Singh, R. P.; Mukherjee, G. K.; Vohat, P.; Singh, Ashok K.

doi:10.1007/s12040-012-0240-4

Cited by 16 publications

(8 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, Lopez-Gonzalez et al (2005) observed VW values to be approximately −10 km deduced from their OH observations, which do not agree with our values. Further, Ghodpage et al (2012) analyzed the long-term nocturnal data of 2004-2007 and also observed that the VW lies between 28.6 and 163 km. Recently, Ghodpage et al (2013) studied the simultaneous mesospheric gravity wave measurements in the OH emission from Gadanki and Kolhapur, inferring mean VW values varying from −26 to −60 km for the Kolhapur observations.…”

Section: Resultsmentioning

confidence: 99%

Response of OH airglow emissions to the mesospheric gravity waves and its comparisons with full wave model simulation at a low latitude Indian station

Ghodpage¹,

Hickey²,

Taori³

et al. 2015

Preprint

View full text Add to dashboard Cite

Abstract. The quasi-monochromatic gravity wave induced oscillations, monitored using the mesospheric OH airglow emission over Kolhapur (16.8° N and 74.2° E), India during January to April 2010 and January to December 2011, have been characterized using the Krassovsky method. The nocturnal variability reveals prominent wave signatures with periods ranging from 5.2–10.8 h as the dominant nocturnal wave with embedded short period waves having wave periods 1.5–4.4 h. The results show that the magnitude of the Krassovsky parameter, viz., |η| ranged from 2.1 to 10.2 for principal or long nocturnal waves (5.2 to10.8 h observed periods), and, from 1.5 to 5.4 for the short waves (1.5 to 4.4 h observed periods) during the years of 2010 and 2011, respectively. The phase, i.e., Φ values of the Krassovsky parameters exhibited larger variability and varied from −8.1 to −167°. The deduced mean vertical wavelengths are found to be approximately −60.2 ± 20 and −42.8 ± 35 km for long and short wave periods for the year 2010. Similarly, for 2011 the mean vertical wavelengths are found to be approximately −77.6 ± 30 km and −59.2 ± 30 km for long and short wave periods, respectively, indicating that the observations over Kolhapur were dominated by upward propagating waves. We use a full wave model to simulate the response of OH emission to the wave motion and compare the results with observed values. In the present report, we discuss the observed wave characteristics and cause of the noted differences.

show abstract

Section: Resultsmentioning

confidence: 99%

Response of OH airglow emissions to the mesospheric gravity waves and its comparisons with full wave model simulation at a low latitude Indian station

Ghodpage¹,

Hickey²,

Taori³

et al. 2015

Preprint

View full text Add to dashboard Cite

show abstract

“…The inhomogeneity in electron density present in the atmosphere can develop in to positive streamers at lower (E < E k ) electric fields Kosar et al, 2012). Such inhomogeneity may arise due to meteor trails (Zabotin and Wright, 2001), electrodynamic effects of thunderstorms (Singh et al, 2011b), gravity wave breaking (Fadnavis et al, 2009;Ghodpage et al, 2012).…”

Section: Spritesmentioning

confidence: 99%

Lighting/Optical Discharges and Climate: A Brief Review

Siingh¹,

Kumar²,

Saha³

et al. 2017

Earth Science India

Self Cite

View full text Add to dashboard Cite

Lightning is a massive electrostatic discharge between the electrically charged regions within clouds or between a cloud and the Earth's surface. Present paper reviewed various features including generation mechanism of lightning discharges and many transient luminous events (TLEs). Optical discharges like sprites and halos are been caused by the upward developing quasi-electrostatic fields associated with intense cloud-to-ground discharges whereas jets (blue starters, blue jets, gigantic jets, palm tree) are caused by the charge imbalance in the thunderstorms during the intra-cloud and cloudto-ground discharges and evolve through the process of leaders and streamers. Elves are been generated by the electromagnetic pulse radiated from the return stroke current of lightning discharges. The impact of atmospheric circulation, global electric circuits (GECs), NO x /O 3 perturbations (in the troposphere and stratosphere) and aerosols on lightning discharges are discussed and their role on climate change are briefly described.

show abstract

“…Solar tides are thermally forced atmospheric oscillations propagating upward with its amplitude growing exponentially with altitude in response to the decrease of the atmospheric density (Chapman and Lindzen, 1970;Sentman et al, 2003;Sao Sabbas et al, 2009;Ghodpage et al, 2012). Gravity waves generated in the troposphere by strong orographic forcing (Jiang et al, 2004;Ghodpage et al, 2012Ghodpage et al, , 2015, deep convection (Fritts and Alexander, 2003), frontal acceleration and geostrophic adjustments (Ford et al, 2000) etc may propagate upward up to the lower thermosphere. At tropical latitudes deep convection associated with severe thunderstorms is found to be a source of broad spectrum gravity waves observed at mesospheric heights Sao Sabbas et al, 2009;Vadas et al, 2009).…”

Section: Elvesmentioning

confidence: 99%