学术论文

      2012年7月海口与北京大气钠层观测

      Observations of Sodium Layer over Beijing and Haikou in July 2012

      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.
      Abstract:
      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 midlatitude 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 120min during the night of July 1,2012 over Haikou,but no DSL structure occurred over Beijing.
      作者: 张铁民 [1] 王继红 [2] 王林茂 [1] 陈学明 [1] 吴建清 [1] 邹旭 [1] 彭鸿雁 [1]
      Author: ZHANG Tiemin [1] WANG Jihong [2] WANG Linmao [1] CHEN Xueming [1] WU Jianqing [1] ZOU Xu [1] PENG Hongyan [1]
      作者单位: 海南师范大学物理与电子工程学院 海口571158 中国科学院国家空间科学中心空间天气学国家重点实验室 北京100190
      刊 名: 空间科学学报 ISTICPKU
      年,卷(期): 2017, 37(4)
      分类号: P352
      在线出版日期: 2017年8月30日
      基金项目: 国家自然科学基金项目,海南省自然科学基金项目