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Alternative TitleLidar observations of atmospheric gravity wave dissipation induced Na atoms transportations in the mesopause region at Langfang, China
巴金; 胡雄; 闫召爱; 郭商勇; 程永强
Source Publication地球物理学报
Keyword钠荧光多普勒激光雷达 大气重力波耗散 钠层结构 钠原子垂直通量 钠原子产生率
Abstract利用中国科学院国家空间科学中心廊坊站(40.0°N,116.3°E)钠荧光多普勒激光雷达2011年至2013年共约82 h的钠原子数密度和垂直风观测数据,分析了廊坊地区中间层顶区域大气重力波耗散引起的钠原子输送特征.分析得到,90~100 km处重力波耗散引起的平均钠原子垂直通量整体为负,钠原子向下输送,在93 km处达到最大负值-1.47×108m-3 m·s-1,85~90 km处平均钠原子垂直通量为正,钠原子向上输送,但通量值随高度递减.钠原子垂直通量方向在90 km处发生转变,垂直通量随高度的变化造成钠原子汇聚,汇聚效应引起的平均钠原子产生率最大值在91 km处达到了1.40×108 m-3/h,该值超过了相同高度上模式计算流星烧蚀注入引起的钠原子产生率峰值,说明重力波耗散对钠层结构的形成具有重要影响.与美国SOR和Maui观测结果相比,平均钠原子产生率峰值大小相近,但出现高度不同,说明大气重力波耗散引起的物质输送具有显著的地域变化特征.研究结果可为大气物质输送理论的完善以及大气金属层物理模式的改进提供观测事实参考.
Other AbstractA total of 82 h observation data derived from a sodium fluorescence Doppler lidar of National Space Science Center (Chinese Academy of Sciences) at Langfang station (40.0° N, 116.3° E), China, were used to study Na atoms transportations induced by gravity wave dissipation in the mesopause region. The mean vertical Na flux was upward from 85 to 89 km, while the flux became downward from 90 to 100 km; the maximum flux was -1.47×108m-3m·s-1at 93 km. The mean Na production rate was positive from 85 to 93.5 km, while the rate became negative from 94 to 98 km; the maximum rate was 1.4×108m-3/h at 91 km. These results suggest the activities of gravity wave dissipations accumulate Na atoms at near 91 km and make the mean Na production rate significantly increase between 88 and 92 km. The mean production rate induced by gravity wave dissipation exceeds the model simulated production rate induced by meteoric input at near 91 km, the observation and comparison results indicate gravity wave dissipations play an important role in the formation of Na layer structure in the mesopause region. Compare with the observation result of SOR and Maui, Na flux and Na production rate are respectively comparable between three stations, but the altitude of maximum value of Na flux and Na production are different, the geographical factors are considered to make contribution to the diversities of Na layer and gravity wave activities in different locations. These observation results can provide guidance for parameterization and evolution of atmospheric metal model in the mesopause region. © 2017, Science Press. All right reserved.
Indexed BySCI ; EI ; CSCD
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Document Type期刊论文
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GB/T 7714
巴金,胡雄,闫召爱,等. 中间层顶重力波耗散引起钠原子输送的激光雷达观测研究[J]. 地球物理学报,2017,60(2):499-506.
APA 巴金,胡雄,闫召爱,郭商勇,&程永强.(2017).中间层顶重力波耗散引起钠原子输送的激光雷达观测研究.地球物理学报,60(2),499-506.
MLA 巴金,et al."中间层顶重力波耗散引起钠原子输送的激光雷达观测研究".地球物理学报 60.2(2017):499-506.
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