E3S Web Conf.
Volume 53, 20182018 3rd International Conference on Advances in Energy and Environment Research (ICAEER 2018)
|Number of page(s)||4|
|Section||Energy Engineering, Materials and Technology|
|Published online||14 September 2018|
Short-term Fluctuations Of The Mesospheric Na Layer Observed By High-time-resolution Lidar
The 38th Research Institution of China Electronics Technology Group
2 School of Electronic Information, Wuhan University, Wuhan, China.
* Corresponding author: firstname.lastname@example.org
Based on the 6-s resolution Na lidar measurements during ~395 hours on 47 different nights from May to November 2011 in Beijing(40.2°N, 116°E), China, it was found that the Na density at altitude 83-98 km always exhibited strong short-term fluctuations. The magnitude of the mean absolute increasing and decreasing rates for these short-term fluctuations ranged from ~8 to ~16 cm-3s-1. Their profiles were close to each other with the increasing rate being slightly larger than that of decreasing rate at most altitudes. This difference coincided with the earlier observations that the Na layer column abundance mostly tends to have a slow net increase during night . The characteristic time for the short-term Na density fluctuations had a magnitude ranging from 46 to 118 s at altitudes between 83 and 98 km, which was apparently shorter than the Brunt-Väisälä period (~5 min). The gravity wave seems difficultly to induce observed Na fluctuations.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.