In this section
@article{Ivchenko:2004,
author = {Ivchenko, N and Rees, MH and Lanchester, BS and Lummerzheim, D and Galand, M and Throp, K and Furniss, I},
journal = {Annales Geophysicae},
pages = {2805--2817},
title = {Observation of O+ (4P-4D0) lines in electron aurora over Svalbard},
volume = {22},
year = {2004}
}
TY - JOUR
AB - This work reports on observations of 0<sup>+</sup> lines in aurora over Svalbard, Norway. The Spectrographic Imaging Facility measures auroral spectra in three wavelength intervals (H<inf>β</inf>, N<sup>+</sup><inf>2</inf> 1N(0,2) and N<sup>+</sup><inf>2</inf> 1N(1,3) . The oxygen ion <sup>4</sup>P-<sup>4</sup>D<sup>0</sup> multiplet (4639-4696 Å) is blended with the N<sup>+</sup><inf>2</inf> 1N(1,3 band. It is found that in electron aurora, the brightness of this multiplet, is on average, about 0. 1 of the N<sup>+</sup><inf>2</inf> 1N(0,2) total brightness. A joint optical and incoherent scatter radar study of an electron aurora event shows that the ratio is enhanced when the ionisation in the upper E-layer (140-190 km) is significant with respect to the E-layer peak below 130 km. Rayed arcs were observed on one such occasion, whereas on other occasions the auroral intensity was below the threshold of the imager. A one-dimensional electron transport model is used to estimate the cross section for production of the multiplet in electron collisions, yielding 0. 18 × 10<sup>-18</sup> cm<sup>2</sup>. © European Geosciences Union 2004.
AU - Ivchenko,N
AU - Rees,MH
AU - Lanchester,BS
AU - Lummerzheim,D
AU - Galand,M
AU - Throp,K
AU - Furniss,I
EP - 2817
PY - 2004///
SN - 0992-7689
SP - 2805
TI - Observation of O+ (4P-4D0) lines in electron aurora over Svalbard
T2 - Annales Geophysicae
VL - 22
ER -