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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2014
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56531304001 |
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Table of Contents:
- Variation of the 0+ ion density during low and high solar activity as measured by the SR0SS-C2 satellite ANANNA BARDHAN DINESH KUMAR SHARMA SARVESH KUMAR JAGDISH RAI Biología pre F2 region E × B drift O+ ion density reversal enhancement The O + ion density measured by the SROSS-C2 satellite during solar minima (year 1995, F 10.7 = 77) and maxima (year 2000, F 10.7 = 181) has been analyzed for studying diurnal, seasonal, latitudinal and geomagnetic variations. The study region covers an area encompassed between 5-35º N latitude and 65-95º E longitude over India at a ~500 km altitude (F2 region). The year 2000 shows significant enhancement in the annual average of O + ion density and attainment of post sunset secondary enhancement compared to 1995. Attributed to pho - toionization, daytime shows a maximum ionization compared to nigttime. However, attainment of post sunset secondary maxima is attributed to the strong pre-reversal enhancement in the vertical E × B drift. The effect of geomagnetic activity Kp through the E × B drift dynamic movement on O + ion density distribution studies indicates periodicities of seven and nine days in 1995 and 2000, respectively, and polynomial dependency of the O + ion density on geomagnetic activity Kp. Further on, stratification of the O + ion density according to latitude (5-35º N) indicates high density in mid-latitudes (12-24º N) compared to high and low latitudes, except in the winter of 1995, which shows a distinct trend (i.e., density decreases with increasing latitude). 2014 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56531304001 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.3 Vol.27