全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:H. Liu , K. Schlegel , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2018, Vol.18 (9), pp.1067-1072DOAJ
摘要:The high-latitude ionospheric response to a major magnetic storm on May 15, 1997 is studied and different responses in the polar cap and the auroral oval are highlighted. Depletion of the F2 region electron density occurred in both the polar cap and the auroral zone, b...
作者:... H. Lühr , H. Lühr , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2015, Vol.33, pp.185-196DOAJ
摘要:By using the accelerometer measurements from CHAMP and GRACE satellites, the tidal signatures of the thermospheric mass density and zonal wind at midlatitudes have been analyzed in this study. The results show that the mass density and zonal wind at southern midlatitudes are...
作者:... H. Lühr , E. Doornbos , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2010, Vol.28 (9), pp.1633DOAJ
摘要:With the help of four years (2002–2005) of CHAMP accelerometer data we have investigated the dependence of low and mid latitude thermospheric density on the merging electric field, E m, during major magnetic storms. Altogether 30 intensive storm events (Dstmi...
作者:R. Liu , H. Lühr , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2010, Vol.28 (1), pp.165DOAJ
摘要:Strong and localized thermospheric mass density events are observed in the polar cap region by the CHAMP satellites at about 400 km altitude during geomagnetic storms. During the 4 years considered (2002–2005) 29 storms with Dst<−100 nT occurred, in 90% of them polar c...
作者:H. Liu , K. Schlegel , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2000, Vol.18 (9), pp.1067-1072Springer
摘要:Abstract(#br)The high-latitude ionospheric response to a major magnetic storm on May 15, 1997 is studied and different responses in the polar cap and the auroral oval are highlighted. Depletion of the F 2 region electron density occurred in both the polar cap and the auroral zone...
作者:... K. Schlegel , S.-Y. Ma , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2000, Vol.18, pp.1067-1072DOAJ
摘要:The high-latitude ionospheric response to a major magnetic storm on May 15, 1997 is studied and different responses in the polar cap and the auroral oval are highlighted. Depletion of the F2 region electron density occurred in both the polar cap and the auroral zone, b...
作者:... R. Liu , S.-Y. Ma , H. Lühr
来源:[J].Annales Geophysicae(IF 1.518), 2011, Vol.29, pp.443-453DOAJ
摘要:Orbit-averaged mass density measurements derived from the satellites CHAMP and GRACE are used to investigate the storm-time prediction model developed by Liu et al. (2010) at different altitudes. This model uses as input only the solar wind merging electric field. From 2002 ...
作者:... H. Lühr , E. Doornbos , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2010, Vol.28, pp.1633-1645DOAJ
摘要:With the help of four years (2002–2005) of CHAMP accelerometer data we have investigated the dependence of low and mid latitude thermospheric density on the merging electric field, E m, during major magnetic storms. Altogether 30 intensive storm events (Dstmi...
作者:R. Liu , H. Lühr , S.-Y. Ma
来源:[J].Annales Geophysicae(IF 1.518), 2010, Vol.28 (1), pp.165-180DOAJ
摘要:Strong and localized thermospheric mass density events are observed in the polar cap region by the CHAMP satellites at about 400 km altitude during geomagnetic storms. During the 4 years considered (2002–2005) 29 storms with Dst<−100 nT occurred, in 90% of them pola...
作者:S.-Y. Ma , S.-Q. Wang
来源:[J].The European Physical Journal B(IF 1.282), 2009, Vol.72 (4), pp.567-573Springer
摘要:Abstract(#br)By determining the specific diffusion mechanism, the intrinsic diffusion coefficients for B in Si over a wide temperature range are calculated with an effective and reliable ab initio method under the condition of thermodynamics equilibrium. All the variables enterin...

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