The Impact of Perturbing Eddy Diffusion and Upper Boundary on the Ionosphere EnKF Assimilation System
文献类型：期刊论文
| 作者 | He, Jianhui1,2,3; Yue, Xinan1,2,3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 126期号:8页码:13 |
| 关键词 | EnKF data assimilation ensemble member generation ionosphere forecast |
| ISSN号 | 2169-9380 |
| DOI | 10.1029/2021JA029366 |
| 英文摘要 | Accurate representation of ensemble members of coupled Ionosphere-Thermosphere (I-T) is crucial to the ionosphere forecast in the ensemble Kalman filter (EnKF) data assimilation system. In this paper, besides the model drivers used in previous studies, including the solar 10.7 cm radio flux (F10.7), auroral hemispheric power (HP) and cross-tail potential drop (CP), the eddy diffusion coefficient (ED), and nighttime vertical O+ flux at the top boundary are also perturbed to generate ensemble members. Based on our developed EnKF data assimilation system, the impact of perturbing different model external forcing parameters on ensemble generation and forecast capability of ionosphere and thermosphere has been investigated in detail through a series of sensitivity tests and data assimilation experiments. This system uses the National Center for Atmospheric Research (NCAR) Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) as a background model. The findings are summarized as follows: (a) Associated with perturbing two additional model forcing parameters, better ensemble members of ionosphere and thermosphere states of the background model can be generated during both daytime and nighttime. (b) The improvement of the forecast capability of the ionosphere and thermosphere variables can be further enhanced. This study can provide a reference for ensemble generating strategy for the coupled I-T EnKF data assimilation in the future. |
| WOS关键词 | ENSEMBLE KALMAN FILTER ; MODEL ; SPECIFICATION ; LATITUDE |
| 资助项目 | Chinese Academy of Sciences[XDB41000000] ; 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000691018000047 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 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" ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 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" ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 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" ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; 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/132A11/102588]  |
| 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, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.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. The Impact of Perturbing Eddy Diffusion and Upper Boundary on the Ionosphere EnKF Assimilation System[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2021,126(8):13. |
| APA | He, Jianhui,&Yue, Xinan.(2021).The Impact of Perturbing Eddy Diffusion and Upper Boundary on the Ionosphere EnKF Assimilation System.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,126(8),13. |
| MLA | He, Jianhui,et al."The Impact of Perturbing Eddy Diffusion and Upper Boundary on the Ionosphere EnKF Assimilation System".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 126.8(2021):13. |
入库方式： OAI收割
来源：地质与地球物理研究所
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