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Impact of CIR Storms on Thermosphere Density Variability during the Solar Minimum of 2008

Abstract

The solar minimum of 2008 was exceptionally quiet, with sunspot numbers at their lowest in 75 years. During this unique solar-minimum epoch, however, solar-wind high-speed streams emanating from near-equatorial coronal holes occurred frequently and were the primary contributor to the recurrent geomagnetic activity at Earth. These conditions enabled the isolation of forcing by geomagnetic activity on the preconditioned solar minimum state of the upper atmosphere caused by Corotating Interaction Regions (CIRs). Thermosphere density observations around 400 km from the CHAMP satellite are used to study the thermosphere density response to solar-wind high-speed streams/CIRs. Superposed epoch results show that the thermosphere density responds to high-speed streams globally, and the density at 400 km changes by 75% on average. The relative changes of neutral density are comparable at different latitudes, although its variability is largest at high latitudes. In addition, the response of thermosphere density to high-speed streams is larger at night than in daytime, indicating the preconditioning effect of the thermosphere response to storms. Finally, the thermosphere density variations at the periods of 9 and 13.5 days associated with CIRs are linked to the spatial distribution of low – middle latitude coronal holes on the basis of the EUVI observations from STEREO.

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References

  • Borovsky, J.E., Steinberg, J.T.: 2006, The “calm before the storm” in CIR/magnetosphere interactions: Occurrence statistics, solar wind statistics, and magnetospheric preconditioning. J. Geophys. Res. 111, A07S10. doi: 10.1029/2005JA011397 .

    Article  Google Scholar 

  • Crowley, G., Reynolds, A., Thayer, J.P., Lei, J., Paxton, L.J., Christensen, A.B., Zhang, Y., Meier, R.R., Strickland, D.J.: 2008, Periodic modulations in thermospheric composition by solar wind high speed streams. Geophys. Res. Lett. 35, L21106. doi: 10.1029/2008GL035745 .

    Article  ADS  Google Scholar 

  • Gibson, S.E., Kozyra, J.U., de Toma, G., Emery, B.A., Onsager, T., Thompson, B.J.: 2009, If the Sun is so quiet, why is the Earth ringing? A comparison of two solar minimum intervals. J. Geophys. Res. 114, A09105. doi: 10.1029/2009JA014342 .

    Article  Google Scholar 

  • Lei, J., Thayer, J.P., Forbes, J.M., Sutton, E.K., Nerem, R.S.: 2008a, Rotating solar coronal holes and periodic modulation of the upper atmosphere. Geophys. Res. Lett. 35, L10109. doi: 10.1029/2008GL033875 .

    Article  ADS  Google Scholar 

  • Lei, J., Thayer, J.P., Forbes, J.M., Wu, Q., She, C., Wan, W., Wang, W.: 2008b, Ionosphere response to solar wind high-speed streams. Geophys. Res. Lett. 35, L19105. doi: 10.1029/2008GL035208 .

    Article  ADS  Google Scholar 

  • Lei, J., Thayer, J.P., Forbes, J.M., Sutton, E.K., Nerem, R.S., Temmer, M., Veronig, A.M.: 2008c, Global thermospheric density variations caused by high-speed solar wind streams during the declining phase of solar cycle 23. J. Geophys. Res. 113, A11303. doi: 10.1029/2008JA013433 .

    Article  ADS  Google Scholar 

  • Lei, J., Thayer, J.P., Burns, A.G., Lu, G., Deng, Y.: 2010, Wind and temperature effects on thermosphere mass density response to the November 2004 geomagnetic storm. J. Geophys. Res. 115, A05303. doi: 10.1029/2009JA014754 .

    Article  Google Scholar 

  • Lomb, N.R.: 1976, Least-squares frequency analysis of unequally spaced data. Astrophys. Space Sci. 39, 447.

    Article  ADS  Google Scholar 

  • McPherron, R.L., Baker, D.N., Crooker, N.U.: 2009, Role of the Russell – McPherron effect in the acceleration of relativistic electrons. J. Atmos. Solar-Terr. Phys. 71, 1032.

    Article  Google Scholar 

  • Mlynczak, M.G., Martin-Torres, F.J., Mertens, C.J., Marshall, B.T., Thompson, R.E., Kozyra, J.U., Remsberg, E.E., Gordley, L.L., Russell, J.M., Woods, T.: 2008, Solar-terrestrial coupling evidenced by periodic behavior in geomagnetic indexes and the infrared energy budget of the thermosphere. Geophys. Res. Lett. 35, L05808. doi: 10.1029/2007GL032620 .

    Article  Google Scholar 

  • Picone, J.M., Hedin, A.E., Drob, D.P., Aikin, A.C.: 2002, NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. J. Geophys. Res. 107(A12), 1468. doi: 10.1029/2002JA009430 .

    Article  Google Scholar 

  • Russell, C.T., McPherron, R.L.: 1973, Semiannual variation of geomagnetic activity. J. Geophys. Res. 78(1), 92.

    Article  ADS  Google Scholar 

  • Scargle, J.D.: 1982, Studies in astronomical time series analysis. II. Statistical aspects of spectral analysis of unevenly spaced data. Astrophys. J. 263, 835.

    Article  ADS  Google Scholar 

  • Sojka, J.J., McPherron, R.L., van Eyken, A.P., Nicolls, M.J., Heinselman, C.J., Kelly, J.D.: 2009, Observations of ionospheric heating during the passage of solar coronal hole fast streams. Geophys. Res. Lett. 36, L19105. doi: 10.1029/2009GL039064 .

    Article  ADS  Google Scholar 

  • Sutton, E.K., Nerem, R.S., Forbes, J.M.: 2007, Density and winds in the thermosphere deduced from accelerometer data. J. Spacecr. Rockets 44(6). doi: 10.2514/1.28641 .

  • Thayer, J.P., Lei, J., Forbes, J.M., Sutton, E.K., Nerem, R.S.: 2008, Thermospheric density oscillations due to periodic solar wind high-speed streams. J. Geophys. Res. 113, A06307. doi: 10.1029/2008JA013190 .

    Article  Google Scholar 

  • Temmer, M., Vršnak, B., Veronig, A.M.: 2007, Periodic appearance of coronal holes and the related variation of solar wind parameters. Solar Phys. 241, 371.

    Article  ADS  Google Scholar 

  • Tsurutani, B.T., Gonzalez, W.D., Gonzalez, A.L.C., Tang, F., Arballo, J.K., Okada, M.: 1995, Interplanetary origin of geomagnetic activity in the declining phase of the solar cycle. J. Geophys. Res. 100(A11), 21717.

    Article  ADS  Google Scholar 

  • Tsurutani, B.T., Gonzalez, W.D., Gonzalez, A.L.C., Guarnieri, F.L., Gopalswamy, N., Grande, M., Kamide, Y., Kasahara, Y., Lu, G., Mann, I., McPherron, R., Soraas, F., Vasyliunas, V.: 2006, Corotating solar wind streams and recurrent geomagnetic activity: A review. J. Geophys. Res. 111, A07S01. doi: 10.1029/2005JA011273 .

    Article  Google Scholar 

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Correspondence to Jiuhou Lei.

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The Sun – Earth Connection near Solar Minimum

Guest Editors: M.M. Bisi, B. Emery, and B.J. Thompson.

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Lei, J., Thayer, J.P., Wang, W. et al. Impact of CIR Storms on Thermosphere Density Variability during the Solar Minimum of 2008. Sol Phys 274, 427–437 (2011). https://doi.org/10.1007/s11207-010-9563-y

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  • DOI: https://doi.org/10.1007/s11207-010-9563-y

Keywords

  • Thermosphere density
  • CIR
  • Coronal holes
  • Solar minimum