An Antarctic NO density profile deduced from the gamma band airglow

Computer Science – Sound

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Airglow, Antarctic Regions, Atmospheric Composition, Nitric Oxide, Mesosphere, Rocket Sounding, Thermosphere

Scientific paper

The nitric oxide density profile between the altitudes 72 and 120 km was obtained by means of the airglow gamma(1, 0) band measured with a rocket-borne radiometer flown at Syowa Station (69 deg S, 40 deg E). The NO density was found to have two peaks with a value of 1.5 x 10 to the 8th per cu cm at 90 and 110 km, and is much larger than those in the middle and low latitudes. Because of a long lifetime of NO in the mesosphere, the observed NO enhancement may be due to the after-effect of the particle precipitation event which occurred within the half day before, despite no polar disturbance during the rocket flight.

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