Sudden post-midnight decrease in equatorial F-region electron densities associated with severe magnetic storms

Annales Geophysicae

Volumn 15, Issue 3, 1997, Pages 306-313

  Lakshmi, D R ^a   Veenadhari, B ^a   Dabas, R S ^a   Reddy, B M ^a  

^a NATIONAL PHYSICAL LABORATORY   (India)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0642311847     PISSN: 09927689     EISSN: None     Source Type: Journal    
DOI: 10.1007/s00585-997-0306-9     Document Type: Article

References (24)

1. Aarons, J., The role of the ring current in the generation or inhibition of equatorial F-layer irregularities during magnetic storms, Radio Sci., 26, 1131-1149, 1991.
2. Abdu, M. A., G. O. Walker, B. M. Reddy, J. H. A. Sobral, B. G. Fejer, T. Kikuchi, N. B. Trevedi, and E. P. Szusxczewicz, Electric field versus neutral wind control of the equatorial anomaly under quiet and disturbed conditions; a global perspective from SUNDIAL' 86, Ann. Geophysicae, 8, 419-430, 1990.
3. Biondi, M. A., and J. W. Meriwether Jr, Measured response of the equatorial thermospheric temperature to geomagnetic activity and solar flux changes, Geophys. Res. Lett., 12, 267-270, 1985
4. Biondi, M. A., J. W. Meriwether Jr, B. G. Fejer, S. A. Gonzalez, and D.C, Hellenbeck., Equatorial thermospheric wind changes during the solar cycle: Measurements at Arequipa, Peru, from 1983 to 1990, J. Geophys. Res., 96, 15917-15930, 1991.
5. Dabas, R. S., and A. R. Jain, Geomagnetic storm effects in ionospheric TEC at an equatorial station: contribution of E x B drifts and meridonal neutral winds, Indian J. Radio Space Phys., 14, 100-106, 1985.
6. Dabas, R. S., D. R. Lakshmi, and B. M. Reddy, Effect of geomagnetic disturbances on the VHF nighttime scintillation activity at equatorial and low latitudes, Radio Sci., 24, 563-573, 1989.
7. Fejer, B. G., R. W. Spiro, and J. C. Foster., Latitudinal variations of perturbation electric fields during magnetically-disturbed period: 1986 SUNDIAL observation and model results, Ann. Geophysicae , 8, 441-454, 1990.
8. Fuller-Rowell, T. J., M. V. Codrescu, R. J. Moffett, and S. Quegan., Response of the thermosphere and ionosphere to geomagnetic storms, J. Geophys. Res., 99, 3893-3914, 1994.
9. Gross, H. S., Unusual heating events at about 250 km altitude at very low latitudes seen by AE-E, J. Atmos. Terr. Phys., 47, 941-945, 1985.
10. Hedin, A. E., MSIS-86 thermospheric model, J. Geophys. Res., 92, 4649-4662, 1987.
11. Krishna Murthy, B. V., and S. S. Hari., Equatorial night-time thermospheric meridional winds: seasonal variations and magnetic activity effects, Proc. STEP Symp., COSPAR, 477-480, 1992.
12. Krishna Murthy, B. V., S. S. Hari, and V. V. Somayajulu, Nighttime equatorial thermospheric meridional winds from ionospheric h′F data, J. Geophys. Res., 95, 4307-4310, 1990.
13. Lakshmi, D. R., B. M. Reddy, and S. Shastri, A prediction model for equatorial and low-latitudes HF communication parameters during magnetic disturbances, Indian J. Radio Space Phys., 12, 118-123, 1983.
14. Lakshmi, D. R., B. C. N. Rao, A. R. Jain, M. K. Goel, and B. M. Reddy, Response of equatorial and low-latitude F-region to the great magnetic storm of 13 March 1989, Ann. Geophysicae, 9, 286-290, 1991.
15. Matsushita, S., A study of morphology of ionospheric storms, J. Geophys. Res., 64, 305-321, 1959.
16. Meriwether, J. W., J. W. Moody, M. A. Biondi, and R. G. Roble, Optical interferometric measurements of night-time equatorial thermospheric winds at Arequipa, Peru, J. Geophys. Res., 91, 5557-5566, 1986.
17. Miller, K., D. G. Torr, and P. G. Richards, Meridional winds in the thermosphere derived from measurement of F2-layer height, J. Geophys. Res., 91, 4531-4535, 1986.
18. Raja Ram, G., and R. G. Rastogi, A synoptic study of the disturbed ionosphere during IGY-IGC (1) the Asian Zone, Ann. Geophysicae, 25, 795-805, 1969.
19. Raja Ram, G., A. C. Das, and R. G. Rastogi, Ionospheric F-region disturbances and their possible mechanisms, Ann. Geophysicae, 27, 469-475, 1971.
20. Reddy, B. M., L. H. Brace, and J. A. Findlay, The ionosphere at 640 kilometers on quiet and disturbed days, J. Geophys. Res., 72, 2709-2727, 1967.
21. Rishbeth, H., F-Region storms and thermospheric circulation, J. Atmos. Terr. Phys., 37, 1055-1064, 1975.
22. Rush, C. M., D. Miller, and J. Gibbs, The relative daily variability of foF2 and hmF2 and their implications for HF radio propagation, Radio Sci., 9, 749-756, 1974.
23. Sahai, Y., J. A. Bittencourt, H. Takashashi, N. R. Teireira, J. H. A. Sobral, B. A. Tinsley, and R. P. Rohrbaugh, Multispectral optical observations in ionospheric F-region storm effects at low latitude, Planet. Space Sci., 36, 371-381, 1988.
24. Tinsley, B. A., Energetic neutral atom precipitation as a possible source of mid-latitude F-region winds, Geophys. Res. Lett., 6, 291-293, 1979.