Covariations in atomic oxygen emissions and ionospheric total electron content during geomagnetic storms

We study the O1 630 and 557.7 nm nightglow disturbances during geomagnetic storms using mathematical simulation, GPS total electron content measurements and optical observations in Eastern Siberia (52 degrees N, 103 degrees E). Revealed were several tens of geomagnetic storms when the 557.7 and 630 nm emission disturbances close-in-amplitude observed during night. These disturbances were similar in shape and synchronous. The 557.7 and 630 nm emission variations correlated with the total electron content disturbances. We suggested that the 557.7 nm emission disturbances may result from the O-2(+) dissociative recombination reaction in this case and they are caused by variations in the parameters of the ionospheric F-layer. It was obtained that the ratio of the green and red volume emission intensities in the F region may vary during magnetic storms. This ratio (V-557.7/V-630) can be modified because of the F region components disturbances. (C) 2012 Elsevier Ltd. All rights reserved.