Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm
Abstract The Iterative Driver Estimation and Assimilation (IDEA) data assimilation technique was used with the Whole Atmosphere Model (WAM) to improve neutral density specification in the upper thermosphere. Two different neutral density data sources were examined to enhance the capability of simula...
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2024SW004010 |
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| author | Ching‐Chung Cheng Timothy Fuller‐Rowell Eric K. Sutton Tzu‐Wei Fang Jann‐Yenq Liu Daniel R. Weimer |
| author_facet | Ching‐Chung Cheng Timothy Fuller‐Rowell Eric K. Sutton Tzu‐Wei Fang Jann‐Yenq Liu Daniel R. Weimer |
| author_sort | Ching‐Chung Cheng |
| collection | DOAJ |
| description | Abstract The Iterative Driver Estimation and Assimilation (IDEA) data assimilation technique was used with the Whole Atmosphere Model (WAM) to improve neutral density specification in the upper thermosphere. Two different neutral density data sources were examined to enhance the capability of simulating the global thermospheric state. The first were accelerometer estimates of neutral density from the Challenging Mini‐Satellite Payload (CHAMP) satellite. The second were neutral density estimates from the Global Ultraviolet Imager (GUVI) limb‐scan airglow observations aboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite. Due to the intensity of the November 2003 storm, two changes were necessary in WAM. The first was allowing the Kp geomagnetic index to exceed 9 and the second was changing the relationship between Kp and the solar wind parameters used to drive the model. With these changes, results show that IDEA effectively captures the thermospheric neutral density at the CHAMP satellite altitude and follows the time‐dependence through the November 2003 storm period. Furthermore, a cross‐comparison was conducted with the GUVI dayside limb scan measurements. GUVI neutral densities within 270–320 km show the closest agreement with WAM when CHAMP data was assimilated by IDEA. We speculate on the potential for observations from GUVI at 300 km to be used as a data source in the IDEA‐WAM simulations. These simulations demonstrate the utility of the IDEA data assimilation technique with physical models and that using either accelerometer observations or ultraviolet airglow limb measurement during extreme storm periods could be used. |
| format | Article |
| id | doaj-art-84182b15b7b44d05b2c567c080312286 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-84182b15b7b44d05b2c567c0803122862025-01-14T16:31:08ZengWileySpace Weather1542-73902024-10-012210n/an/a10.1029/2024SW004010Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 StormChing‐Chung Cheng0Timothy Fuller‐Rowell1Eric K. Sutton2Tzu‐Wei Fang3Jann‐Yenq Liu4Daniel R. Weimer5Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USACooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USASWx TREC University of Colorado Boulder Boulder CO USASpace Weather Prediction Center NOAA Boulder CO USADepartment of Space Science and Engineering National Central University Taoyuan City TaiwanCenter for Space Science and Engineering Research Virginia Tech Blacksburg VA USAAbstract The Iterative Driver Estimation and Assimilation (IDEA) data assimilation technique was used with the Whole Atmosphere Model (WAM) to improve neutral density specification in the upper thermosphere. Two different neutral density data sources were examined to enhance the capability of simulating the global thermospheric state. The first were accelerometer estimates of neutral density from the Challenging Mini‐Satellite Payload (CHAMP) satellite. The second were neutral density estimates from the Global Ultraviolet Imager (GUVI) limb‐scan airglow observations aboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite. Due to the intensity of the November 2003 storm, two changes were necessary in WAM. The first was allowing the Kp geomagnetic index to exceed 9 and the second was changing the relationship between Kp and the solar wind parameters used to drive the model. With these changes, results show that IDEA effectively captures the thermospheric neutral density at the CHAMP satellite altitude and follows the time‐dependence through the November 2003 storm period. Furthermore, a cross‐comparison was conducted with the GUVI dayside limb scan measurements. GUVI neutral densities within 270–320 km show the closest agreement with WAM when CHAMP data was assimilated by IDEA. We speculate on the potential for observations from GUVI at 300 km to be used as a data source in the IDEA‐WAM simulations. These simulations demonstrate the utility of the IDEA data assimilation technique with physical models and that using either accelerometer observations or ultraviolet airglow limb measurement during extreme storm periods could be used.https://doi.org/10.1029/2024SW004010WAMthermospheric neutral densityIDEA data assimilationCHAMPTIMED/GUVIgeomagnetic storm |
| spellingShingle | Ching‐Chung Cheng Timothy Fuller‐Rowell Eric K. Sutton Tzu‐Wei Fang Jann‐Yenq Liu Daniel R. Weimer Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm Space Weather WAM thermospheric neutral density IDEA data assimilation CHAMP TIMED/GUVI geomagnetic storm |
| title | Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm |
| title_full | Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm |
| title_fullStr | Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm |
| title_full_unstemmed | Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm |
| title_short | Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm |
| title_sort | thermospheric neutral density data assimilation system based on the whole atmosphere model during the november 2003 storm |
| topic | WAM thermospheric neutral density IDEA data assimilation CHAMP TIMED/GUVI geomagnetic storm |
| url | https://doi.org/10.1029/2024SW004010 |
| work_keys_str_mv | AT chingchungcheng thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm AT timothyfullerrowell thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm AT ericksutton thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm AT tzuweifang thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm AT jannyenqliu thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm AT danielrweimer thermosphericneutraldensitydataassimilationsystembasedonthewholeatmospheremodelduringthenovember2003storm |