抄録
This paper presents a case study of the day-to-day variability in the midlatitude upper atmospheric ion temperature (∼200-400 km) with a focus on variability resulting from meteorological forcing. The data are obtained by the Millstone Hill incoherent scatter radar (42.6°N, 288.5°E) on 18-31 January 2010, in coincidence with a major sudden stratospheric warming. We elucidate oscillations in ion temperature with both tidal periods (∼8 h and ∼12 h) and non-tidal periods (>24 h) by analyzing residuals between the observed temperatures and those expected from an empirical model. We present the spatial-temporal development of periodicities in ion temperature and discuss to what degree these periodicities might be related to the sudden stratospheric warming event. The spectral location and temporal evolution of periodicities with ∼9.9-12.9 h and ∼6.2-7.9 h suggest that they are related to the semidiurnal (12 h) and terdiurnal (8 h) tides that are enhanced during the sudden stratospheric warming. Periodicities with ∼3-4 d and ∼10-13 d are likely related to Rossby waves with 4 d and 10 d periods, while the strong periodicity observed at 16-17 h could result from the nonlinear interaction of the quasi 2 d wave with the semidiurnal tide. As planetary waves are not expected to propagate to altitudes of ∼200-250 km, these experimental results raise questions about the potential mechanisms of coupling between the lower and upper atmosphere.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 472-487 |
| ページ数 | 16 |
| ジャーナル | Journal of Geophysical Research: Space Physics |
| 巻 | 118 |
| 発行部数 | 1 |
| DOI | |
| 出版物ステータス | 出版済み - 1 1 2013 |
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- Geophysics
- Oceanography
- Forestry
- Aquatic Science
- Ecology
- Condensed Matter Physics
- Water Science and Technology
- Soil Science
- Geochemistry and Petrology
- Earth-Surface Processes
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Atmospheric Science
- Earth and Planetary Sciences (miscellaneous)
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- Materials Chemistry
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これを引用
Wave signatures in the midlatitude ionosphere during a sudden stratospheric warming of January 2010. / Goncharenko, Larisa Petrovna; Hsu, Vicki W.; Brum, Christiano Garnett Marques; Zhang, Shun Rong; Fentzke, Jonathan T.
：: Journal of Geophysical Research: Space Physics, 巻 118, 番号 1, 01.01.2013, p. 472-487.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Wave signatures in the midlatitude ionosphere during a sudden stratospheric warming of January 2010
AU - Goncharenko, Larisa Petrovna
AU - Hsu, Vicki W.
AU - Brum, Christiano Garnett Marques
AU - Zhang, Shun Rong
AU - Fentzke, Jonathan T.
PY - 2013/1/1
Y1 - 2013/1/1
N2 - This paper presents a case study of the day-to-day variability in the midlatitude upper atmospheric ion temperature (∼200-400 km) with a focus on variability resulting from meteorological forcing. The data are obtained by the Millstone Hill incoherent scatter radar (42.6°N, 288.5°E) on 18-31 January 2010, in coincidence with a major sudden stratospheric warming. We elucidate oscillations in ion temperature with both tidal periods (∼8 h and ∼12 h) and non-tidal periods (>24 h) by analyzing residuals between the observed temperatures and those expected from an empirical model. We present the spatial-temporal development of periodicities in ion temperature and discuss to what degree these periodicities might be related to the sudden stratospheric warming event. The spectral location and temporal evolution of periodicities with ∼9.9-12.9 h and ∼6.2-7.9 h suggest that they are related to the semidiurnal (12 h) and terdiurnal (8 h) tides that are enhanced during the sudden stratospheric warming. Periodicities with ∼3-4 d and ∼10-13 d are likely related to Rossby waves with 4 d and 10 d periods, while the strong periodicity observed at 16-17 h could result from the nonlinear interaction of the quasi 2 d wave with the semidiurnal tide. As planetary waves are not expected to propagate to altitudes of ∼200-250 km, these experimental results raise questions about the potential mechanisms of coupling between the lower and upper atmosphere.
AB - This paper presents a case study of the day-to-day variability in the midlatitude upper atmospheric ion temperature (∼200-400 km) with a focus on variability resulting from meteorological forcing. The data are obtained by the Millstone Hill incoherent scatter radar (42.6°N, 288.5°E) on 18-31 January 2010, in coincidence with a major sudden stratospheric warming. We elucidate oscillations in ion temperature with both tidal periods (∼8 h and ∼12 h) and non-tidal periods (>24 h) by analyzing residuals between the observed temperatures and those expected from an empirical model. We present the spatial-temporal development of periodicities in ion temperature and discuss to what degree these periodicities might be related to the sudden stratospheric warming event. The spectral location and temporal evolution of periodicities with ∼9.9-12.9 h and ∼6.2-7.9 h suggest that they are related to the semidiurnal (12 h) and terdiurnal (8 h) tides that are enhanced during the sudden stratospheric warming. Periodicities with ∼3-4 d and ∼10-13 d are likely related to Rossby waves with 4 d and 10 d periods, while the strong periodicity observed at 16-17 h could result from the nonlinear interaction of the quasi 2 d wave with the semidiurnal tide. As planetary waves are not expected to propagate to altitudes of ∼200-250 km, these experimental results raise questions about the potential mechanisms of coupling between the lower and upper atmosphere.
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U2 - 10.1029/2012JA018251
DO - 10.1029/2012JA018251
M3 - Article
VL - 118
SP - 472
EP - 487
JO - Journal of Geophysical Research
JF - Journal of Geophysical Research
SN - 0148-0227
IS - 1
ER -