Characteristics Analysis of Thermospheric Density Response during the Different Intensity of Geomagnetic Storms
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摘要: 利用CHAMP卫星数据,对2002-2008年12个不同强度磁暴事件期间的热层大气密度变化特征进行分析,并研究对应磁暴期间大气模式NRLMSISE-00分布特征.结果表明,大磁暴期间日侧大气密度峰值从高纬到低纬的时间延迟为2h,中小磁暴期间的延迟时间为3~4h;春秋季暴时大气密度分布基本呈南北对称分布,而夏冬季大气密度的分布是夏半球大于冬半球,春秋季暴时大气密度大于夏冬季;NRLMSISE-00大气模式得到的热层大气密度很好的体现了半球分布以及季节分布的特征,但模式模拟结果偏小;Dst指数峰值比ap指数峰值更能反应大气密度的变化情况.Abstract: The CHAMP satellite data is used to analyze the characteristics of the thermospheric density during 12 different intensity geomagnetic storm events from 2002 to 2008, and the distribution characteristics of NRLMSISE-00 model during the corresponding magnetic storm events are studied. The results show that during large geomagnetic storms, the time delay of the peak thermospheric density from high latitude to low latitude is 2 hours, while the time delay during medium and small geomagnetic storms is about 3 to 4 hours. The distribution of thermospheric density in spring and autumn is basically symmetric between north and south, while in summer and winter the thermospheric density of summer hemisphere is greater than that in winter hemisphere. The thermospheric density in spring and autumn is greater than that in summer and winter. The thermospheric density obtained by the NRLMSISE-00 simulates well the pattern of the hemispherical distribution and seasonal distribution characteristics, but the simulation is smaller than the measurements. The peak change of Dst index can reflect the change of atmospheric density better than the peak change of ap index.
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Key words:
- Geomagnetic storm /
- Thermospheric density /
- Model
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[1] HEDIN A E. MSIS-86 thermospheric model[J]. J. Geophys. Res.:Space Phys., 1987, 92(A5):4649-4662 [2] HEDIN A E. Extension of the MSIS thermosphere model into the middle and lower atmosphere[J]. J. Geophys. Res.:Space Phys., 1991, 96(A2):1159-1172 [3] PICONE J M, HEDIN A E, DROB D P, et al. NRLMSISE-00 empirical model of the atmosphere:statistical comparisons and scientific issues[J]. J. Geophys. Res.:Space Phys., 2002, 107(A12):15-16 [4] JACCHIA L G. Revised static models of the thermosphere and exosphere with empirical temperature profiles[J]. Sao Special Rep., 1971, 313(20):3138-3144 [5] BERGER C, BIANCALE R, ILL M, et al. Improvement of the empirical thermospheric model DTM:DTM94-a comparative review of various temporal variations and prospects in space geodesy applications[J]. J. Geodesy, 1998, 72(3):161-178 [6] BRUINSMA S, THUILLIER G, BARLIER F. The DTM-2000 empirical thermosphere model with new data assimilation and constraints at lower boundary:accuracy and properties[J]. J. Atmos. Sol.:Terr. Phys., 2003, 65(9):1053-1070 [7] DOORNBOS E, KLINKRAD H, VISSER P. Atmospheric density calibration using satellite drag observations[J]. Adv. Space Res., 2005, 36(3):515-521 [8] RHODEN E A, FORBES J M, MARCOS F A. The influence of geomagnetic and solar variabilities on lower thermosphere density[J]. J. Atmos. Sol.:Terr. Phys., 2000, 62(11):999-1013 [9] LIU H, LUHR H, HENIZE V, et al. Global distribution of the thermospheric total mass density derived from CHAMP[J]. J. Geophys. Res.:Space Phys., 2005, 110(A4). DOI: 10.1029/2004ja010741 [10] ZHANG Xiaofang, LIU Libo, LIU Songtao, et al. A statistical study on the response of thermospheric total mass density to geomagnetic stroms[J]. Chin. J. Geophys., 2015, 58(9):3023-3037(张晓芳, 刘立波, 刘松涛, 等. 磁暴期间热层大气密度变化[J]. 地球物理学报, 2015, 58(9):3023-3037) [11] LIU Shushi, GONG Jiancun, LIU Siqing, et al. Thermospheric density during geomagnetic storm based on EOF analysis[J]. Chin. J. Geophys., 2013, 56(10):3236-3245(刘舒莳, 龚建村, 刘四清, 等. 基于经验正交分析法的暴时热层大气密度时空分布规律[J]. 地球物理学报, 2013, 56(10):3236-3245) [12] SUTTON E K, FORBES J M, NEREM R S. Global thermospheric neutral density and wind response to the severe 2003 geomagnetic storms from CHAMP accelerometer data[J]. J. Geophys. Res.:Space Phys., 2005, 110(A9). DOI: 10.1029/2004ja010985 [13] LIU H, LUHR H. Strong disturbance of the upper thermospheric density due to magnetic storms:CHAMP observations[J]. J. Geophys. Res.:Space Phys., 2005, 110(A9). DOI: 10.1029/2004ja010908 [14] LEI J, MATSUO T, DOU X, et al. Annual and semiannual variations of thermospheric density:EOF analysis of CHAMP and GRACE data[J]. J. Geophys. Res.:Space Phys., 2012, 117(A1). DOI: 10.1029/2011ja017324 [15] BRUINSMA S, TAMAGNAN D, BIANCALE R. Atmospheric densities derived from CHAMP/STAR accelerometer observations[J]. Planet. Space Sci., 2004, 52(4):297-312 [16] REIGBER C, LÜHR H, SCHWINTZER P. CHAMP mission status[J]. Adv. Space Res., 2002, 30(2):129-134 [17] MIAO Juan, LIU Siqing, LI Zhitao, et al. Correlation analysis of thermal density variation characteristics and solar radiation and geomagnetic index in thermal layer[J]. Manned Spaceflight, 2012, 18(5):24-30(苗娟, 刘四清, 李志涛, 等. 热层大气密度变化特征与太阳辐射和地磁指数的相关性分析[J]. 载人航天, 2012, 18(5):24-30)
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