Mesospheric Ozone Density Profile in the Polar Region.

Yamamoto, Hiromasa; Yajima, Ken-ichi; Sekiguchi, Hiroyuki; Makino, T.

doi:10.5636/jgg.49.675

Cited by 1 publication

(2 citation statements)

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“…Under sunlit conditions the volume emission rate of this O 2 airglow is in proportion to O 3 density although corrections for the selfabsorption and quenching are needed below 70 km (Yamamoto et al, 1997).…”

Section: Instrumentationmentioning

confidence: 99%

“…Both of density profiles by the UV absorption radiometers in the S310.22 and S310.23 experiments show monotonous decrease from 6.0 × 10 11 cm -3 and 4.7 × 10 11 cm -3 , respectively, at 40 km to 2.6 × 10 8 cm -3 and 3.1 × 10 8 cm -3 , respectively, at 70 km. The data analysis and error estimations of the IR emission technique have already been described in a separate paper (Yamamoto et al, 1997). The value of Einstein coefficient of the 1.27 μm band used is 2.58 × 10 -4 s -1 (Badger et al, 1965).…”

Section: Ozonementioning

confidence: 99%

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Polar thermosphere-stratosphere photochemical coupling experiment: Two rocket measurements in polar winter at 69°N

et al. 2014

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Two rocket experiments were carried out just before and after the polar night at Andoya (69°N), Norway to investigate transport of nitric oxide produced by auroral processes into the middle atmosphere and its influence on the ozone chemistry. Nitric oxide densities of (2-5) × 10 8 cm -3 found in the 70-90 km region are one to two orders of magnitude larger than those at middle latitudes. The measured density profiles appear to agree semiquantitatively with model simulations which includes auroral processes. The influence on ozone densities in the 70-90 km region due to such enhanced nitric oxide abundance is found to be still insignificant as compared to that due to transport in the middle of February, one month after the end of polar night and one month before the spring equinox. The larger ozone densities found in February (in spite of longer sunlit duration) than in November in the 40-60 km region again support predominance of transport over photochemical destruction.

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Section: Instrumentationmentioning

confidence: 99%

Section: Ozonementioning

confidence: 99%