A data-model comparative study of ionospheric positive storm phase in the midlatitude F region

G. Lu, L. P. Goncharenko, A. J. Coster, A. D. Richmond, R. G. Roble, N. Aponte, L. J. Paxton

研究成果: 著書/レポートタイプへの貢献会議での発言

3 引用 (Scopus)

抄録

A strong positive storm phase was observed by both the Millstone Hill and Arecibo incoherent scatter radars during a moderate geomagnetic storm on 10 September 2005. The positive storm phase featured an interesting UT–altitude profile of the F region electron density enhancement that closely resembles the Greek letter L. The radar measurements showed that the uplift of the electron density peak height corresponded to a strong upward ion drift, whereas the subsequent falling of the peak height coincided with a downward ion drift. Using realistic, time-dependent ionospheric convection and auroral precipitation as input, the thermosphere–ionosphere electrodynamics general circulation model (TIEGCM) is able to reproduce the same L-like structure in the electron density profile, along with many large-scale features in electron temperature and vertical ion drift as observed by the radars. Over the 3-day period of 8–10 September, our simulation results show an error of 1%–4% for hmF2, electron, and ion temperatures at both radar locations. The estimated error for NmF2 is about 9% at Millstone Hill and 19% at Arecibo. However, the simulated vertical ion drifts are less accurate, with the normalized root-mean-square errors of 72% at Millstone Hill and 52% at Arecibo, due largely to model’s inability to capture the large temporal fluctuations measured by the radars. However, it reproduces reasonably well the overall large-scale variations during the 3-day period, including the storm-time-enhanced upward ion drift that is responsible for the interesting F region density profile. The model is also able to reproduce the temporal and spatial total electron content variations as shown in the global GPS maps. The comparison with the GUVI O/N2 is less satisfactory, although there is a general agreement in terms of relative O/N2 changes during the storm in the longitudinal sector between 60°W and 80°W where the radars are located. The detailed data–model comparison carried out in this study is helpful not only to validate the model but also to interpret the complex observations. The TIEGCM simulations reveal that it is the enhanced meridional neutral wind, not the penetration electric field, that is the primary cause of the L structure of the F region electron density profile.

元の言語英語
ホスト出版物のタイトルMidlatitude Ionospheric Dynamics and Disturbances. 2008
編集者Anthea J. Coster, Tim Fuller-Rowell, Michael Mendillo, Roderick Heelis, Paul M. Kintner, Anthony J. Mannucci
出版者Blackwell Publishing Ltd.
ページ63-75
ページ数13
ISBN(電子版)9781118666555
ISBN(印刷物)9780875904467
DOI
出版物ステータス出版済み - 1 1 2008

出版物シリーズ

名前Geophysical Monograph Series
181
ISSN(印刷物)0065-8448
ISSN(電子版)2328-8779

Fingerprint

temperate regions
F region
ionospherics
comparative study
electron density
ion
electron density profiles
ions
electrodynamics
general circulation model
electron energy
radar measurement
radar
root-mean-square errors
magnetic storms
electron
ion temperature
profiles
falling
geomagnetic storm

All Science Journal Classification (ASJC) codes

  • Geophysics

これを引用

Lu, G., Goncharenko, L. P., Coster, A. J., Richmond, A. D., Roble, R. G., Aponte, N., & Paxton, L. J. (2008). A data-model comparative study of ionospheric positive storm phase in the midlatitude F region. : A. J. Coster, T. Fuller-Rowell, M. Mendillo, R. Heelis, P. M. Kintner, & A. J. Mannucci (版), Midlatitude Ionospheric Dynamics and Disturbances. 2008 (pp. 63-75). (Geophysical Monograph Series; 巻数 181). Blackwell Publishing Ltd.. https://doi.org/10.1029/181GM07

A data-model comparative study of ionospheric positive storm phase in the midlatitude F region. / Lu, G.; Goncharenko, L. P.; Coster, A. J.; Richmond, A. D.; Roble, R. G.; Aponte, N.; Paxton, L. J.

Midlatitude Ionospheric Dynamics and Disturbances. 2008. 版 / Anthea J. Coster; Tim Fuller-Rowell; Michael Mendillo; Roderick Heelis; Paul M. Kintner; Anthony J. Mannucci. Blackwell Publishing Ltd., 2008. p. 63-75 (Geophysical Monograph Series; 巻 181).

研究成果: 著書/レポートタイプへの貢献会議での発言

Lu, G, Goncharenko, LP, Coster, AJ, Richmond, AD, Roble, RG, Aponte, N & Paxton, LJ 2008, A data-model comparative study of ionospheric positive storm phase in the midlatitude F region. : AJ Coster, T Fuller-Rowell, M Mendillo, R Heelis, PM Kintner & AJ Mannucci (版), Midlatitude Ionospheric Dynamics and Disturbances. 2008. Geophysical Monograph Series, 巻. 181, Blackwell Publishing Ltd., pp. 63-75. https://doi.org/10.1029/181GM07
Lu G, Goncharenko LP, Coster AJ, Richmond AD, Roble RG, Aponte N その他. A data-model comparative study of ionospheric positive storm phase in the midlatitude F region. : Coster AJ, Fuller-Rowell T, Mendillo M, Heelis R, Kintner PM, Mannucci AJ, 編集者, Midlatitude Ionospheric Dynamics and Disturbances. 2008. Blackwell Publishing Ltd. 2008. p. 63-75. (Geophysical Monograph Series). https://doi.org/10.1029/181GM07
Lu, G. ; Goncharenko, L. P. ; Coster, A. J. ; Richmond, A. D. ; Roble, R. G. ; Aponte, N. ; Paxton, L. J. / A data-model comparative study of ionospheric positive storm phase in the midlatitude F region. Midlatitude Ionospheric Dynamics and Disturbances. 2008. 編集者 / Anthea J. Coster ; Tim Fuller-Rowell ; Michael Mendillo ; Roderick Heelis ; Paul M. Kintner ; Anthony J. Mannucci. Blackwell Publishing Ltd., 2008. pp. 63-75 (Geophysical Monograph Series).
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abstract = "A strong positive storm phase was observed by both the Millstone Hill and Arecibo incoherent scatter radars during a moderate geomagnetic storm on 10 September 2005. The positive storm phase featured an interesting UT–altitude profile of the F region electron density enhancement that closely resembles the Greek letter L. The radar measurements showed that the uplift of the electron density peak height corresponded to a strong upward ion drift, whereas the subsequent falling of the peak height coincided with a downward ion drift. Using realistic, time-dependent ionospheric convection and auroral precipitation as input, the thermosphere–ionosphere electrodynamics general circulation model (TIEGCM) is able to reproduce the same L-like structure in the electron density profile, along with many large-scale features in electron temperature and vertical ion drift as observed by the radars. Over the 3-day period of 8–10 September, our simulation results show an error of 1{\%}–4{\%} for hmF2, electron, and ion temperatures at both radar locations. The estimated error for NmF2 is about 9{\%} at Millstone Hill and 19{\%} at Arecibo. However, the simulated vertical ion drifts are less accurate, with the normalized root-mean-square errors of 72{\%} at Millstone Hill and 52{\%} at Arecibo, due largely to model’s inability to capture the large temporal fluctuations measured by the radars. However, it reproduces reasonably well the overall large-scale variations during the 3-day period, including the storm-time-enhanced upward ion drift that is responsible for the interesting F region density profile. The model is also able to reproduce the temporal and spatial total electron content variations as shown in the global GPS maps. The comparison with the GUVI O/N2 is less satisfactory, although there is a general agreement in terms of relative O/N2 changes during the storm in the longitudinal sector between 60°W and 80°W where the radars are located. The detailed data–model comparison carried out in this study is helpful not only to validate the model but also to interpret the complex observations. The TIEGCM simulations reveal that it is the enhanced meridional neutral wind, not the penetration electric field, that is the primary cause of the L structure of the F region electron density profile.",
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AU - Aponte, N.

AU - Paxton, L. J.

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N2 - A strong positive storm phase was observed by both the Millstone Hill and Arecibo incoherent scatter radars during a moderate geomagnetic storm on 10 September 2005. The positive storm phase featured an interesting UT–altitude profile of the F region electron density enhancement that closely resembles the Greek letter L. The radar measurements showed that the uplift of the electron density peak height corresponded to a strong upward ion drift, whereas the subsequent falling of the peak height coincided with a downward ion drift. Using realistic, time-dependent ionospheric convection and auroral precipitation as input, the thermosphere–ionosphere electrodynamics general circulation model (TIEGCM) is able to reproduce the same L-like structure in the electron density profile, along with many large-scale features in electron temperature and vertical ion drift as observed by the radars. Over the 3-day period of 8–10 September, our simulation results show an error of 1%–4% for hmF2, electron, and ion temperatures at both radar locations. The estimated error for NmF2 is about 9% at Millstone Hill and 19% at Arecibo. However, the simulated vertical ion drifts are less accurate, with the normalized root-mean-square errors of 72% at Millstone Hill and 52% at Arecibo, due largely to model’s inability to capture the large temporal fluctuations measured by the radars. However, it reproduces reasonably well the overall large-scale variations during the 3-day period, including the storm-time-enhanced upward ion drift that is responsible for the interesting F region density profile. The model is also able to reproduce the temporal and spatial total electron content variations as shown in the global GPS maps. The comparison with the GUVI O/N2 is less satisfactory, although there is a general agreement in terms of relative O/N2 changes during the storm in the longitudinal sector between 60°W and 80°W where the radars are located. The detailed data–model comparison carried out in this study is helpful not only to validate the model but also to interpret the complex observations. The TIEGCM simulations reveal that it is the enhanced meridional neutral wind, not the penetration electric field, that is the primary cause of the L structure of the F region electron density profile.

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