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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Observing System Impact on Ionospheric Specification Over China Using EnKF Assimilation

文献类型：期刊论文

作者He, Jianhui2,3,4,5; Yue, Xinan2,3,4,5; Hu, Lianhuan3,4,5; Wang, Junyi3,4,5; Li, Mingyuan2,3,4,5; Ning, Baiqi3,4,5; Wan, Weixing2,3,4,5; Xu, Jiyao1,2
刊名SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
出版日期2020-10-01
卷号18期号:10页码:14
DOI10.1029/2020SW002527
英文摘要Accurate ionospheric specification for the current and future is one of the key tasks in operational space weather. In this work, we have assessed the effect of a dense ground network consisting of different radio instruments either developed or under developing on ionosphere nowcasting and forecasting over China and adjacent region (0-60 degrees N and 70-140 degrees E) through observing system simulation experiments. The data assimilation system is an Ensemble Kalman filter (EnKF) ionosphere and thermosphere data assimilation algorithm. The National Center for Atmospheric Research Thermosphere Ionosphere Electrodynamics General Circulation Model is used as a background model. Effects of different observation types, including the slant total electron content from Beidou System geostationary satellite and Global Position System and electron density observations from ionosondes and incoherent scattering radar on the ionospheric nowcasting and forecasting, are examined by the accurate specification of ionosphere key parameters (total electron content and 3-D electron density). We found that simultaneously assimilating different observation types can greatly improve the quality of ionosphere specification. Furthermore, updating the thermospheric state variables in the coupled thermosphere-ionosphere forecast model in the assimilation step plays an important role in improving the ionosphere forecasting. The ionosphere forecasting capability can last longer (>24 hr) in each observing system simulation experiment due to the adjusted thermosphere states. This study can provide a reference for observing system design over the China region and future ionosphere forecasting operation. Plain Language Summary In this work, the different observation data types are ingested into the first principle physical model TIEGCM by Ensemble Kalman filter algorithm to evaluate the effect of every kind of data on the nowcasting and forecasting of ionosphere parameters in China and adjacent region (0-60 degrees N and 70-140 degrees E). Three different kinds of observations are used to evaluate the nowcasting and 24 hr predictions of ionosphere parameters in the observation system simulation experiments, which includes the slant total electron content data from Beidou geostationary satellite systems and other global navigation satellite systems (e.g., Global Position System) and electron density profile from ionosondes and incoherent scattering radar. We found that the better ionosphere ionospheric nowcasting and forecasting results can be achieved by simultaneously assimilating above three different types of observations. Meanwhile, the improvement of thermosphere states can be found in each observing system simulation experiment by the comparison of the value of [O/N-2]. The ionosphere forecasting capability can be enhanced to be 24 hr due to the adjusted thermosphere states.
WOS关键词ENSEMBLE KALMAN FILTER ; SIMULATION EXPERIMENT ; FORECAST SKILL ; MODEL ; VALIDATION
资助项目B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Natural Science Foundation of China[41427901] ; Key Research Program of the IGGCAS[IGGCAS-201904] ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project"
WOS研究方向Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000589621000011
出版者AMER GEOPHYSICAL UNION
资助机构B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Key Research Program of the IGGCAS ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project" ; Open Research Project of Large Research Infrastructures-"Study on the interaction between low/mid-latitude atmosphere and ionosphere based on the Chinese Meridian Project"
源URL[http://ir.iggcas.ac.cn/handle/132A11/98743]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Yue, Xinan
作者单位1.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Beijing Natl Observ Space Environm, Inst Geol & Geophys, Beijing, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 He, Jianhui,Yue, Xinan,Hu, Lianhuan,et al. Observing System Impact on Ionospheric Specification Over China Using EnKF Assimilation[J]. SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS,2020,18(10):14.
APA He, Jianhui.,Yue, Xinan.,Hu, Lianhuan.,Wang, Junyi.,Li, Mingyuan.,...&Xu, Jiyao.(2020).Observing System Impact on Ionospheric Specification Over China Using EnKF Assimilation.SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS,18(10),14.
MLA He, Jianhui,et al."Observing System Impact on Ionospheric Specification Over China Using EnKF Assimilation".SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS 18.10(2020):14.

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来源：地质与地球物理研究所

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