基于中国东港台站的OH气辉成像观测数据对重力波波源的事件分析
A study of wave sources of gravity wave events observer by OH airglow imager located at Donggang station
查看参考文献29篇
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文摘
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利用东港(40°N,124°E)台站于2013年9月15—16日的OH气辉成像观测数据报告了两个重力波事件(1和2).同时,结合北京十三陵(40.3°N,116.2°E)台站的多普勒流星雷达风场数据和位于39.4°N,130.6°E位置处的SABER/TIMED卫星的温度参数分析发现,观测的两个重力波事件于2013年9月15—16日02∶00—03∶00LT时间段,和70~110km高度是自由传播的.利用反射线追踪方法分析表明,重力波事件1和事件2分别产生于(39.3°N,117.2°E)和(47.1°N,121.3°E).且事件1的波源位置与对流活动和大气向上向下运动过程中产生的不稳定性吻合较好.然而,通过ECMWF再分析资料和MTSAT卫星观测数据分析表明,事件2可能由对流活动或大气向上运动过程中可能产生的不稳定性导致.利用MERRA自地面到约70km高度的风场数据分析表明,观测的重力波事件1和事件2的水平相速度分别是83.5m·s~(-1)(事件1)和80.1m·s~(-1)(事件2),均大于低层-中层大气风速-10~45m·s~(-1).因此,观测的两个重力波事件是可能从低层大气传播到中层-低热层大气的. |
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其他语种文摘
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The paper reports two gravity wave events(event 1and event 2)observed by OH allsky airglow imager at Donggang(40°N,124°E)station,on the night of 15—16September,2013. The two events are free propagation at time period between 02LT and 03LT in the altitude between 70km and 110km,by using horizontal wind data sets from the Doppler meteor radar located at Shisanling(40.3°N,116.2°E)and temperature parameters from SABER/TIMED satellite located at 39.4°N,130.6°E.Then,a method of reverse ray tracing was used to study the source regions of these two gravity wave events.The results indicate that the locations of the two events are at(39.3°N,117.2°E),and(47.1°N,121.3°E),respectively.The wave source location of event 1is highly related with intensity convective activity from the infrared cloud images by the Multi-function Transport Satellite.However,event 2could be caused by the dynamic instability due to vertical motion of air masses from Omega(Pa/s)data observed by the European Center for Medium-Range Weather Forecasts,or convective activity from the infrared cloud images from Multi-function Transport Satellite.In addition,the two events are probably propagated to MLT region from lower source locations,because the observed phase speeds of 83.5m·s~(-1)(event 1) and 80.1m·s~(-1) (event 2)of these two events are faster than zonal wind velocity(-10~45m·s~(-1)) obtained from the Modern Era Retrospective-analysis for Research and Applications below 70km altitudes. |
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来源
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地球物理学报
,2018,61(6):2198-2206 【核心库】
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DOI
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10.6038/cjg2018l0088
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关键词
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中层大气动力学
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气辉成像
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大气重力波
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地址
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1.
中国科学院空间科学与应用研究中心, 天气学国家重点实验室, 北京, 100190
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中国科学院大学, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0001-5733 |
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学科
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大气科学(气象学) |
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基金
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国家自然科学基金
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中国科学院项目
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国家973计划
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文献收藏号
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CSCD:6254034
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