Evidence for the lowering of the centroid of daytime thermospheric O(1D) 630.0nm emission over the magnetic equator: First results

Pant, Tarun Kumar; Vineeth, C.; Sumod, S. G.; Jose, Lijo

doi:10.1016/j.asr.2010.08.011

Cited by 2 publications

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References 26 publications

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“…Therefore, the response time of dayglow emissions would be the time taken for the plasma to get pumped upward from lower F-region to the emission centroid. In fact, Pant et al (2011) have indicated a lowering of the centroid of O 1 D 630.0 nm dayglow emission over the dip equator, to an altitude around 180 km during quiet days. Nonetheless, if we consider an average vertical drift velocity (V z ) of 20 m/s and average centroid height of 200 km, the plasma will take ∼42-45 min to reach 200 km from the source region (150 km).…”

Section: Discussionmentioning

confidence: 99%

Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

et al. 2021

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This paper reports, for the “first time,” the delayed response of O1D 630.0 nm dayglow emissions over Trivandrum (8.5°N, 77°E, 0.5°N dip lat.), a geomagnetic dip equatorial station in India, to the noontime X‐class solar flare event of July 30, 2005. The dayglow measurements were made using a unique dayglow photometer operating at three wavelengths. The Equatorial Electrojet induced magnetic field, measured using a proton precession magnetometer, showed a magnetic spike having ∼90 nT enhancement during this flare with a time delay of ∼7.2 min. A noteworthy observation is that unlike to the conventional belief, the O1D 630.0 nm dayglow over the dip equator exhibited a fourfold enhancement during the noontime flare after a time delay of ∼45 min. Analysis of satellite measured electron density and modeling simulations indicate that the thermospheric O1D 630.0 nm dayglow emission over the dip equatorial region during a solar flare is primarily driven by the electrodynamics, rather than the direct solar control. This finding is new, unique and very important for the studies related to plasma‐neutral coupling and also for modeling studies on the equatorial thermosphere‐ionosphere region is concerned.

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Section: Discussionmentioning

confidence: 99%

Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

et al. 2021

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On the behavior of thermospheric O1D 630.0 nm dayglow emission during counter electrojet events

Vineeth

Ambili

Pant

2023

Advances in Space Research

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Evidence for the lowering of the centroid of daytime thermospheric O(1D) 630.0nm emission over the magnetic equator: First results

Cited by 2 publications

References 26 publications

Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

On the behavior of thermospheric O1D 630.0 nm dayglow emission during counter electrojet events

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Evidence for the lowering of the centroid of daytime thermospheric O(1D) 630.0nm emission over the magnetic equator: First results

Cited by 2 publications

References 26 publications

Role of Equatorial Fountain for the Delayed Response of Thermosphere O1D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

Role of Equatorial Fountain for the Delayed Response of Thermosphere O1D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

On the behavior of thermospheric O1D 630.0 nm dayglow emission during counter electrojet events

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Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare

Role of Equatorial Fountain for the Delayed Response of Thermosphere O¹D 630.0 nm Dayglow Over the Dip Equator During an X‐Class Flare