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| 1 | Recent investigation on the coupling between the ionosphere and upper atmosphere显示文摘Scientific attention has recently been focused on the coupling of the earth's upper atmosphere and ionosphere. In the present work, we review the advances in this field, emphasizing the studies and contributions of Chinese scholars. This work first introduces new developments in the observation instruments of the upper atmosphere. Two kinds of instruments are involved: optical instruments(lidars, FP interferometers and all-sky airglow imagers) and radio instruments(MST radars and all-sky meteor radars). Based on the data from these instruments and satellites, the researches on climatology and wave disturbances in the upper atmosphere are then introduced. The studies on both the sporadic sodium layer and sporadic E-layer are presented as the main works concerning the coupling of the upper atmosphere and the low ionosphere. We then review the investigations on the ionospheric longitudinal structure and the causative atmospheric non-migrating tide as the main progress of the coupling between the atmosphere and the ionospheric F2-region. Regarding the ionosphere-thermosphere coupling, we introduce studies on the equatorial thermospheric anomaly, as well as the influence of the thermospheric winds and gravity waves to the ionospheric F2-region. Chinese scholars have made much advancement on the coupling of the ionosphere and upper atmosphere, including the observation instruments, data precession, and modeling, as well as the mechanism analysis. | WAN WeiXing XU JiYao | 2014 | Science China Earth Sciences2014，57，9： | 7 |
| 2 | 中国高层大气与电离层耦合研究进展显示文摘近年来,地球高层大气与电离层之间的耦合研究为众多学者所关注.在回顾这一领域国际上若干研究方向进展的基础上,着重介绍了中国学者的近期研究工作与贡献.首先,扼要介绍了中国高层大气观测的新发展,包括激光雷达、FP干涉仪、全天空气辉成像仪等光学探测,MST雷达、全天空流星雷达等无线电探测手段.在高层大气变化特性研究中,介绍了高层大气的气候学及各种大气波动的研究进展.在高层大气与低电离层的耦合研究方面,介绍了突发钠层及低热层钠层的观测研究和钠层模式的研究进展,以及突发E层与大气行星波之间的耦合研究工作.在高层大气波动过程与电离层F2层耦合研究中,着重介绍了电离层四波经度结构与高层大气非迁移潮汐之间的耦合特性与机理研究.在热层与电离层耦合的研究方向上,介绍了热层背景大气风场和重力波对电离层的作用、带电粒子对赤道热层的影响与热层赤道异常的形成机理研究等热层电离层相互耦合工作.综合认为,近年来中国学者在高层大气与电离层耦合的研究领域进行了大量工作,包括实验观测及数据分析、模式化与理论研究等.中国学者取得的研究成果为这一领域近年来的进展与突破做出了重要贡献. | 万卫星 徐寄遥 | 2014 | 中国科学:地球科学2014，44，9： | 7 |
| 3 | Climatology of global gravity wave activity and dissipation revealed by SABER/TIMED temperature observations显示文摘Gravity wave activity and dissipation in the height range from the low stratosphere to the low thermosphere(25–115 km)covering latitudes between 50°S and 50°N are statistically studied by using 9-year(January 22,2002–December 31,2010)SABER/TIMED temperature data.We propose a method to extract realistic gravity wave fluctuations from the temperature profiles and treat square temperature fluctuations as GW activity.Overall,the gravity wave activity generally increases with height.Near the equator(0°–10°),the gravity wave activity shows a quasi-biennial variation in the stratosphere(below 40 km)while from 20°to 30°,it exhibits an annual variation below 40 km;in low latitudes(0°–30°)between the upper stratosphere and the low thermosphere(40–115 km),the gravity wave activity shows a semi-annual variation.In middle latitudes(40°–50°),the gravity wave activity has a clear annual variation below 85 km.In addition,we observe a four-monthly variation with peaks occurring usually in April,August,December in the northern hemisphere and in February,June,October in the southern hemisphere,respectively,above 85 km in middle latitudes,which has been seldom reported in gravity wave activity.In order to study the dissipation of gravity wave propagation,we calculate the gravity wave dissipation ratio,which is defined as the ratio of the gravity wave growth scale height to the atmosphere density scale height.The height variation of the dissipation ratio indicates that strong gravity wave dissipation mainly concentrates in the three height regions:the stratosphere(30–60 km),the mesopause(around 85 km)and the low thermosphere(above 100 km).Besides,gravity wave energy enhancement can be also observed in the background atmosphere. | SHUAI Jing ZHANG ShaoDong HUANG ChunMing YI Fan HUANG KaiMing GAN Quan GONG Yun | 2014 | Science China(Technological Sciences)2014，57，5： | 5 |
| 4 | A brief of recent research progress on ionospheric disturbances显示文摘Ionospheric disturbances are the main causes of space weather events,which seriously influence accurate navigation,telecommunication,and so on.It is a fundamental issue to detect and analyze the disturbance processes of the ionosphere.Theoretically,the understanding of the mechanisms of most ionospheric disturbances depends on observational results.With the development of space observation techniques and related equipments,various eforts have been made to analyze the long-term statistical variations as well as sudden disturbances of ionospheric observation results.We briefly report some research progresses of ionospheric disturbances achieved in recent years,with regard to ground-based and satellites observations.The purpose is to provide a reference about the latest research progresses and improve the development of the future ionospheric disturbances observations and related researches. | XIAO Zuo YU ShiMei SHI Hao HAO Yong | 2013 | Science China(Information Sciences)2013，56，12： | 5 |
| 5 | Observations of gravity wave activity during stratospheric sudden warmings in the Northern Hemisphere显示文摘Arctic stratospheric sudden warming(SSW) with polar vortex displacement and splitting occurred in 2008 and 2009, respectively. The temperature profiles derived from the Constellation Observing System for Meteorology, Ionosphere and Climate(COSMIC) along with NCEP/NCAR reanalysis are used to investigate the gravity wave(GW) variations during these SSW events. Some phenomena are characterized and possible mechanisms are discussed. The GW variations during both types of SSW events shared some similarities. During the warming events, enhanced zonal mean GW amplitudes are detected. The enhancements of GW amplitudes first appeared at higher altitudes and then progressed downward during the major warming events. The downward progressions correspond well with the height variations of the zonal wind reversal, and the enhancements seem to occur at the same time with the wind reversal. The spatial variations of GWs showed evident correlation to the polar vortex. Generally, GWs were enhanced at the edge of the polar vortex where the background wind was strong, whereas the areas with the largest GW amplitudes did not always correspond with those with the strongest background wind. The differences during the two types of SSW are also noticeable. In the 2008 major event, the magnitudes of the zonal mean GW enhancements during the downward progression were relatively stable, whereas in the 2009 major event, a clear reduction was detected as the GW enhancement was progressing downward. Also, the recovery time of the polar vortex was longer in 2009. These differences indicate that different types of SSWs may have different impacts on the GW. | JIA Yue ZHANG ShaoDong YI Fan HUANG ChunMing HUANG KaiMing GAN Quan GONG Yun | 2015 | Science China(Technological Sciences)2015，58，6： | 4 |
| 6 | Advances in the Researches of the Middle and Upper Atmosphere in China in 2012–2014显示文摘In this report we summarize the research results by Chinese scientists in 2012–2014. The focuses are placed on the researches of the middle and upper atmosphere, specifically the researches related to ground-based observation capability development, dynamical processes, the property of circulation and chemistry-climate coupling of the middle atmospheric layers. | CHEN Zeyu CHEN Hongbin XU Jiyao BIAN Jianchun QIE Xiushu Lü Daren CHEN Wen REN Rongcai ZHANG Shaodong DOU Xiankang LI Tao HU Xiong HU Yongyun TIAN Wenshou | 2014 | 空间科学学报2014，34，5： | 0 |
| 7 | 平流层全球重力波活动的气象电离层及气候卫星观测显示文摘利用从2007年1月~2013年2月的COSMIC(constellation observation system for meteorology ionosphere and climate)温度数据,分析了平流层(20~35 km)的全球重力波活动及其随纬度、高度和季节的变化特征,揭示了平流层不同纬度重力波活动的中期变化规律;以及重力波振荡周期随纬度的变化。赤道地区重力波全年活动很强,且存在明显的准两年振荡(quasi-biennial oscillation,QBO)。在20°S^20°N的重力波势能极大值区与强对流区域保持一致。中高纬地区重力波主要表现为冬季强夏季弱。中纬地区,两个半球冬季陆地上重力波活动强于海洋,且南美洲南部安第斯山每年除夏季外,都有较明显的重力波活动。高纬地区,南半球冬季重力波分布保持稳定,而北半球则在某些区域增强,某些区域较弱,这一现象可能是与SSW(stratospheric sudden warming)相关。通过LS谱图分析,发现QBO主要出现在平流层低纬地区,AO(annual oscillation)和SAO(semiannual oscillation)则主要出现在平流层中高纬地区。 | 周梦君 黄春明 | 2018 | 科学技术与工程2018，18，9： | 0 |
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