Effects of TADs on the F region of the mid-latitude ionosphere during an intense geomagnetic storm

Yuan, Zhigang; Ning, Baiqi; Deng, Xiaohua

doi:10.1016/j.asr.2009.05.022

Cited by 7 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, due to the unavailability of ionospheric data of a midlatitude station in the same longitude zone we could not assess the possible candidature of the composition disturbances for the decrease in O + density. However, the work reported by Yuan et al [2009] which deals with the response of daytime F region ionosphere to the event of 31 March 2001 significantly adds up to the present work. They observed a short‐duration positive ionospheric storm effect which they attributed to the equatorial meridional wind associated with TADs.…”

Section: Discussionmentioning

confidence: 60%

“…The pulse like fluctuations in the virtual height variations of different sounding frequencies with the wavefront tilt of the disturbance shown in Figure 6 confirms the existence of TAD during the end of MP and beginning of RP of the storm. Yuan et al [2009] also show the presence of storm‐induced TAD having a meridional velocity of 622 m/s. Thus, the short duration positive storm effect observed during the end of MP and beginning of RP is associated with the existence of TADs.…”

Section: Discussionmentioning

confidence: 84%

See 1 more Smart Citation

Response of low-latitude ionosphere of the Indian region during the supergeomagnetic storm of 31 March 2001

et al. 2011

View full text Add to dashboard Cite

[1] The study explores the response of ion composition (H + and O + ion) and ion temperature at the F2 region altitude during the intense geomagnetic storm of 31 March 2001 by using retarding potential analyzer onboard SROSS-C2 satellite data over the low-latitude region. The simultaneous enhancement of H + ion and ion temperature along with depletion of O + ion concentration is observed at the altitude of about 350 km during the beginning of storm recovery phase. These results are unique of their kind and attributed to the energetic particle (H + /H atoms) originating from ring current and the consequent charge exchange reaction. In addition, the ionosonde observations show the short-term positive storm effect during the main phase and beginning of recovery phase (RP) over the low-mid latitude station, Delhi. The results clearly show that such effect is due to the passage of storm-induced traveling atmospheric disturbances. The dominance of storm-induced disturbance circulation is also observed during the second day of RP in terms of enhanced peak density heights. The rise in height due to storm-induced meridional wind is effectively seen in the nighttime ionosphere and is not associated with any considerable variation in F2 region critical frequency.

show abstract

Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 84%

Response of low-latitude ionosphere of the Indian region during the supergeomagnetic storm of 31 March 2001

et al. 2011

View full text Add to dashboard Cite

show abstract

“…However, present study suggests the significant influence of TADs and associated composition disturbance at the F 1 region heights. Recently, Yuan et al [2009] demonstrated that there is a strong influence of TADs on the shape of the electron density profile in the F 1 region ionosphere at middle latitudes and suggested that TADs are likely to be responsible for the evolution of the F 1 cusp. In the present study, the cusp of additional stratification is formed between the pre‐existing and vertically extended F 1 and F 2 region in the presence of TADs.…”

Section: Discussionmentioning

confidence: 99%

Daytime additional F layer stratification over low‐midlatitude station of the Indian sector under geomagnetic disturbed conditions

Yadav¹,

Upadhayaya²,

Das³

2012

J. Geophys. Res.

View full text Add to dashboard Cite

In this paper, the observations of additional F layer stratification are presented in a region which is situated at the outer edge of equatorial ionization anomaly (EIA) zone. The digital ionosonde data observed over Delhi (28.6° N, 77.2° E, dip 42.44° N) during March–April, 2001 has been used to carry out the present work. The observational period was geomagnetically disturbed and represents the high solar activity phase of 23rd solar cycle. The additional transient cusp is frequently observed in the considered months before the noon hours; however, in this paper only five prominent cases are presented. From the analysis of ionograms, it is observed that the transient additional cusp is formed between the pre‐existing F1 and F2 layer; hence, named as the cusp of F1.5. Study reveals that the Traveling Atmospheric Disturbances (TADs) along with the vertical expansion of F layer provides the necessary condition for the existence of this transient feature. The intensification of F1 layer along with increased altitude immediately after the disappearance of additional stratification remains one of the fascinating features of the present results. The present investigation demonstrates that the daytime F1 and F2 region over low‐midlatitude station is strongly modulated by the passage of TIDs, originating at high latitudes or by atmospheric disturbances of local origin during the high solar activity period. The concurrent presence of TADs and the associated disturbance composition appears to be plausible reason behind the present observations.

show abstract

“…Figure 1, taken from , provides a general summary of the physically rich behavior prevalent at storm time within mid and subauroral latitudes. The various categories of important phenomena are individually labeled: storm enhanced density (SED) [Foster, 1993], subauroral polarization streams (SAPS) [Foster and Burke, 2002] and narrower subauroral ion drifts (SAID) [Galperin et al 1974;Spiro et al 1979;Anderson et al 2001], penetration electric fields [Nishida, 1968] and their relationship to the storm time dynamo [Blanc and Richmond, 1980;Huang et al 2006;Maruyama et al 2005], enhanced neutral winds driven by SAPS [Zhang et al, 2015], traveling ionospheric disturbances (TIDs) at long, middle, and short wavelengths [Panasenko et al, 2018;Zhang et al, 2019], traveling atmospheric disturbances (TADs) [Yuan et al, 2009, Lu et al, 2020, frictional heating [Richmond et al, 1979;Heelis and Coley, 1988], and ion upwelling / outflow [Erickson et al, 2004]. Not listed are several global processes which could be very important for midlatitudes, including storm-time neutral wind and neutral composition variations as part of storm-time general circulation.…”

Section: The Complex Intercoupled Physical Picture At Mid and Sub Aur...mentioning

confidence: 99%

Midlatitude and subauroral region studies: essential for understanding of key atmosphere–ionosphere–thermosphere–magnetosphere dynamic processes

Zhang,

Gocharenko,

Coster

et al. 2023

Bulletin of the AAS

View full text Add to dashboard Cite

Effects of TADs on the F region of the mid-latitude ionosphere during an intense geomagnetic storm

Cited by 7 publications

References 31 publications

Response of low-latitude ionosphere of the Indian region during the supergeomagnetic storm of 31 March 2001

Response of low-latitude ionosphere of the Indian region during the supergeomagnetic storm of 31 March 2001

Daytime additional F layer stratification over low‐midlatitude station of the Indian sector under geomagnetic disturbed conditions

Midlatitude and subauroral region studies: essential for understanding of key atmosphere–ionosphere–thermosphere–magnetosphere dynamic processes

Contact Info

Product

Resources

About