【摘 要】
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We report on a sporadic sodium layer (SSL) event observed by our Na fluorescence lidar at Wuhan, China (31°N, 114°E) on 16 March 1999, and we reveal some spec
【机 构】
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Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
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We report on a sporadic sodium layer (SSL) event observed by our Na fluorescence lidar at Wuhan, China (31°N, 114°E) on 16 March 1999, and we reveal some special behaviour. From careful analysis of various sodium content variations of the layer during the development of this SSL event, it is found that besides the sodium injection mechanism as expected, another mechanism which we call atmospheric dynamics also made a noticeable contribution to this SSL formation. Computer simulations confirmed that under the combined action ora suitable sodium injection and a bi-direction vertical wind field, an SSL profile can be reproduced with a pronounced SSL peak on a normal sodium layer, as we observed in this event. From these results, it is emphasized that atmospheric dynamics is important for SSL formation.
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