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题名: 2012年7月海口与北京大气钠层观测
其他题名: Observations of Sodium Layer over Beijing and Haikou in July 2012
作者: 张铁民; 王继红; 王林茂; 陈学明; 吴建清; 邹旭; 彭鸿雁
作者部门: 空间科学部
关键词: 激光雷达 ; 中高层大气 ; 钠层密度 ; 大气光学
刊名: 空间科学学报
ISSN号: 0254-6124
出版日期: 2017
卷号: 37, 期号:4, 页码:424-431
收录类别: CSCD
项目资助者: 国家自然科学基金项目 ; 海南省自然科学基金项目
中文摘要: 2012年7月海南激光雷达站(20°N,110°E)和北京激光雷达站(40°N, 116°E)同时进行观测,对比低纬和中纬度中高层大气钠层分布及密度变化特性.两地使用相同的Nd:YAG激光器和泵浦染料激光器产生589 nm 激光,设定相同的激光参数,使用相同的直径1000 mm的望远镜接收钠层的光子回波.两地均观测到突发钠层和双钠层事件.其中:海口观测到突发钠层事件9个,双钠层事件1个;北京观测到突发钠层事件1个,双钠层事件4个.分析海口和北京同一天夜间观测的大气钠层特性,对比两地同时观测到的钠层高度与密度的不同变化,发现当天夜间低纬度地区海口市上空钠层出现双钠层结构,持续时间123 min,但是北京上空钠层没有发现该结构.
英文摘要: The observations were conducted by lidar over Haikou (20°N, 110°E) and Beijing (40°N,116°E) in July 2012. The basic characteristics of the sodium layer density at a low-latitude and mid-latitude location are analyzed by the observations. The double sodium layer events and sporadic layer were observed over Beijing and Haikou. A Nd:YAG laser and a pumped dye laser are used to generate the probing beam. The wavelength of the dye laser is set to be 589 nm by a sodium fluorescence cell. The energy and divergence of the beam are set about 45 mJ and 1 mrad, respectively. The backscattered fluorescence photons from the sodium layer are collected by a telescope with a primary mirror which diameter is equal to 1000 mm. There are 9 events of Sporadic Sodium Layer (SSL) and 1 event of Double Sodium Layer (DSL) occurred in Haikou, and 1 event of SSL and 4 events of DSL occurred in Beijing. The variety and distribution of the sodium density over Beijing and Haikou during the night of July 1, 2012 are compared. A DSL structure was observed and it had lasted 120 min during the night of July 1, 2012 over Haikou, but no DSL structure occurred over Beijing.
语种: 中文
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内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6054
Appears in Collections:空间科学部_期刊论文

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