A case study on multiple self-interactions of MSTID bands: New insights

Dipjyoti, Patgiri,; Rathi, Rahul; Yadav, Veejendra K.; Sarkhel, Sumanta; Chakrabarty, D.; Mondal, Subarna; Krishna, M. V. Sunil; Upadhayaya, A. K.; Vivek, Chiranjeevi G.; Kannaujiya, Suresh; Sunda, Surendra

doi:10.1016/j.asr.2023.05.047

Cited by 3 publications

(5 citation statements)

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“…The technique of velocity calculation of any plasma structure is described elaborately by Patgiri, Rathi, Yadav, Sarkhel, et al. (2024). For checking cloud condition, images without any filter are also used (Figures 1k–1o).…”

Section: Resultsmentioning

confidence: 99%

“…Despite having similar propagation direction and alignment, the degree of VTEC depletion associated with the plasma‐depleted structure on 26 June 2021 is significantly larger (∼4 TECU) compared to that associated with the plasma‐depleted bands on 27 June 2021 (∼1.5 TECU). It is well known that propagating MSTIDs can cause VTEC depletion of 0.5–2 TECU (Ding et al., 2011; Huang et al., 2016; Otsuka et al., 2008, 2013; Patgiri, Rathi, Yadav, Sarkhel, et al., 2024; Shiokawa et al., 2008). VTEC depletions and morphological characteristics associated with the plasma‐depleted bands on 27 June 2021 indicate that these bands are part of MSTID (Ding et al., 2011; Huang et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

“…This plasma-depleted structure was observed propagating southwestward in both sets of images with mean horizontal velocity obtained from 630.0 nm images of 74 ± 5 ms 1 . The technique of velocity calculation of any plasma structure is described elaborately by Patgiri, Rathi, Yadav, Sarkhel, et al (2024). For checking cloud condition, images without any filter are also used (Figures 1k 1 -1o 1 ).…”

Section: Simultaneous Observation Of Plasma-depleted Structure In 630...mentioning

confidence: 99%

“…During 5 years of airglow observations from a mid-latitude station, Hanle (32.7°N, 78.9°E; Mlat. 24.1°N), Ladakh, India, different types of plasma structures, viz., electrified and non-electrified medium-scale traveling ionospheric disturbances (MSTIDs), mid-latitude spread-F (MSF), and mid-latitude field-aligned plasma depletion, have been observed in 630.0 nm images (Patgiri, Rathi, Yadav, Sarkhel, et al, 2024;Rathi et al, 2021Rathi et al, , 2022Rathi et al, , 2024Sivakandan et al, 2020Sivakandan et al, , 2021Yadav, Rathi, Gaur, et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…During 5 years of airglow observations from a mid‐latitude station, Hanle (32.7°N, 78.9°E; Mlat. 24.1°N), Ladakh, India, different types of plasma structures, viz., electrified and non‐electrified medium‐scale traveling ionospheric disturbances (MSTIDs), mid‐latitude spread‐F (MSF), and mid‐latitude field‐aligned plasma depletion, have been observed in 630.0 nm images (Patgiri, Rathi, Yadav, Sarkhel, et al., 2024; Rathi et al., 2021, 2022, 2024; Sivakandan et al., 2020, 2021; Yadav, Rathi, Sarkhel, et al., 2021; Yadav, Rathi, Gaur, et al., 2021). The present study reports a first of its kind event in which the same plasma‐depleted structure was observed both in 630.0 and 557.7 nm images on a geomagnetically quiet night (Ap = 3) on 26 June of low solar active year 2021.…”

Section: Introductionmentioning

confidence: 99%

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A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

Patgiri,

Rathi,

Yadav

et al. 2024

Geophysical Research Letters

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This letter reports first simultaneous detection of F‐region plasma‐depleted structure in O(1D) 630.0 and O(1S) 557.7 nm airglow images on a geomagnetically quiet‐night (Ap = 3) of 26 June 2021 from mid‐latitude station (Hanle, India) due to enhanced thermospheric 557.7 nm emission. Since nighttime thermospheric 557.7 nm emission over mid‐latitudes is predominantly masked by significantly larger mesospheric component, F‐region plasma structures are rarely observed in 557.7 nm images. Interestingly, thermospheric 557.7 nm emission was not significant on the following geomagnetically quiet‐night as bands of medium‐scale traveling ionospheric disturbance were only observed in 630.0 nm images. Poleward wind generated by Equatorial Temperature and Wind Anomaly transported plasma from the boundary of equatorial ionization anomaly, causing significant electron density enhancement around 250 km and descent of F‐layer peak over Hanle on 26 June 2021. This amplified the dissociative recombination enabling the simultaneous detection of plasma‐depleted structure in 557.7 and 630.0 nm images.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Simultaneous Observation Of Plasma-depleted Structure In 630...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

Patgiri,

Rathi,

Yadav

et al. 2024

Geophysical Research Letters

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Investigation on Chasing and Interaction of Traveling Ionospheric Disturbances Based on Multi‐Instrument

Luo,

Xu,

et al. 2024

JGR Space Physics

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In this study, we use multi‐instrument observations (all‐sky imager (ASI), global navigation satellite system (GPS) receivers, digisonde) to study the interaction of nighttime medium‐scale traveling ionospheric disturbances (MSTIDs) on 13 November 2018. The most attractive aspect of this event is that the interaction appeared between two dark bands both propagated southwestward. The airglow observations show that the latter band moved faster and caught up with the former, and these two bands merged into a new one. The propagating characteristics and morphology of the MSTIDs changed during the interaction process. The simulations from the Thermosphere‐Ionosphere‐Electrodynamics General Circulation Model (TIEGCM) suggested that the ionospheric background zonal winds and electron density distributions could play essential roles in the interaction of the MSTIDs. Moreover, the merging process might be associated with the electrostatic reconnection.

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Role of Coupled Electrodynamics of E‐ and F‐Regions on the Rapid Poleward Extension of EMSTID Fronts

Patgiri,

Nirwal,

Rathi

et al. 2024

JGR Space Physics

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This paper investigates the role of coupled E‐ and F‐regions electrodynamics behind the rapid poleward extension of two dark fronts of an electrified medium‐scale traveling ionospheric disturbance (EMSTID). The fronts of EMSTID observed in O(1D) 630.0 nm airglow images extended poleward from the southern edge of the field‐of‐view to the location of the imager at Hanle (32.7°N, 78.9°E; Mlat. 24.1°N), India, on the geomagnetically quiet (Ap = 3) night of 09 June 2021. The existence of the fronts outside the southern edge of field‐of‐view before and during their extension was apparent from temporal fluctuations in the vertical total electron content. Additionally, favorable direction of thermospheric neutral wind to initiate Perkins instability existed beyond the southern edge of field‐of‐view prior to EMSTID's first appearance in the airglow images. Therefore, the observed EMSTID were likely generated outside the southern edge of field‐of‐view. Interestingly, the expected clockwise rotation of fronts with clockwise rotation of thermospheric neutral wind was not observed, although it was necessary to sustain the positive‐growth of Perkins instability. This indicates the involvement of E‐F coupling to sustain the positive‐growth of EMSTID since the presence of sporadic‐E layers was evident from the signal‐to‐noise ratio amplitude of L1 band and zonal wind profiles over the observation region. The enhanced polarization electric field caused due to E‐F coupling produced larger vertical E × B drift, which helped the EMSTID to sustain positive‐growth during the fronts' extension. Additionally, the enhanced northwestward E × B drift helped to maintain the northwest‐southeast orientation of EMSTID fronts, during the rotation of thermospheric neutral wind.

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A case study on multiple self-interactions of MSTID bands: New insights

Cited by 3 publications

References 53 publications

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

Investigation on Chasing and Interaction of Traveling Ionospheric Disturbances Based on Multi‐Instrument

Role of Coupled Electrodynamics of E‐ and F‐Regions on the Rapid Poleward Extension of EMSTID Fronts

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A case study on multiple self-interactions of MSTID bands: New insights

Cited by 3 publications

References 53 publications

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(1D) 630.0 and O(1S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(1D) 630.0 and O(1S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

Investigation on Chasing and Interaction of Traveling Ionospheric Disturbances Based on Multi‐Instrument

Role of Coupled Electrodynamics of E‐ and F‐Regions on the Rapid Poleward Extension of EMSTID Fronts

Contact Info

Product

Resources

About

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(¹D) 630.0 and O(¹S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night