The state of the F-region during the energy budget campaign

Details The state of the F-region during the energy budget campaign The state of the F-region during the energy budget campaign

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47...49l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 47, Jan.-Mar. 1985, p. 49-60. Research supported by the Fo

Computer Science

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Energy Budgets, F Region, Ionosondes, Ionospheric Electron Density, Magnetic Disturbances, Traveling Ionospheric Disturbances, Atmospheric Ionization, Critical Frequencies, Diurnal Variations, Geomagnetic Latitude, Ionospheric Ion Density, Ionospheric Sounding, Midlatitude Atmosphere, Polar Regions

Scientific paper

The state of the F-region during the Energy Budget Campaign (November/December 1980, Scandinavia) is analysed from ionosonde and electron content data. Auxiliary data were taken from other ground-based measurements and from in situ measurements made during the Campaign. A description of the overall state of the F-layer from mid-latitudes to high latitudes is followed by a detailed analysis for the nights November 10/11, November 15/16 and November 30/December 1, which are of main interest for the Campaign. In higher latitudes a distinct difference was found between the geomagnetically 'quiet' period and the two 'disturbed' periods. Under 'quiet' conditions a well defined trough was observed moving equatorwards in the evening and back polewards in the morning. Under 'disturbed' conditions the latitude dependence of electron content changed drastically. Near 60 deg of geomagnetic latitude a large increase of ionization appeared which moved equatorwards during the night. The magnitude of the enhancement depended on the level of the local geomagnetic activity. The enhancment effects are attributed to the precipitation of soft electrons producing F-layer ionization in a region confined in latitude but extended in longitude.

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