Observations of horizontal transport effects on high latitude metastable O(1D), N(2D) auroral emissions

Details Observations of horizontal transport effects on high latitude metastable O(1D), N(2D) auroral emissions Observations of horizontal transport effects on high latitude metastable O(1D), N(2D) auroral emissions

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32.1407d&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Nov. 1984, p. 1407-1421.

Computer Science

6

Auroras, Emission Spectra, Gas Transport, Metastable Atoms, Oxygen Spectra, Diurnal Variations, Interplanetary Magnetic Fields, Visual Photometry

Scientific paper

The results of an analysis of photometric measurements of the NI (520 nm) and OI (630 nm) emissions at the French Arctic station Nord are presented. The time variations of the emissions are interpreted by comparison with smaller simultaneous ground based and satellite measurements. It is found that the N(2D) atoms formed at the dayside cleft are carried by the neutral wind in a plume across the polar cap so that the ratio of 630 nm to 520 nm intensities decreases along the plume with increasing distance from the source region. In the polar cap, but outside of the plume region 630 nm emission is produced by the electron impact of polar rain and by substorms that reach high latitudes. Some of the possible reasons for the nighttime increase in the intensity ratio with the decreasing North-South transport component Bz are discussed.

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