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化学物质释放激发中低纬扩展F的数值模拟

DOI: 10.6038/cjg20130904, PP. 2906-2911

Keywords: 中低纬电离层,spread-F发展,电场和磁场,数值模拟

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Abstract:

利用离子和电子动量方程、连续性方程以及电流连续性方程建立了适合描述中低纬spread-F发展的物理模型,并对模型进行了数值求解,讨论了利用H2O释放来激发电离层Rayleigh-Taylor不稳定性的可能性.结果表明,电离层处于不稳定状态时,H2O在电离层底部释放后,造成电子的大量消耗,增强了峰值高度以下电子的密度梯度,有利于spread-F的发展,在spread-F发展的过程中,释放中心附近会形成电子密度的消耗区,两侧出现密度的增强区;而电离层比较稳定时,初始扰动会逐渐稳定下来,但化学物质释放仍能造成电子较长时间、较大范围的扰动.

References

[1]  黄朝松, 李钧. 大气重力波触发的Rayleigh-Taylor不稳定性的时空演变. 地球物理学报, 1995, 38(3): 138-147. Huang C S, Li J. Spatial and temporal evolution of the Rayleigh-Taylor instability initiated by atmospheric gravity waves. Chinese J. Geophys. (in Chinese), 1995, 38(3): 138-147.
[2]  Kelley M C, Larsen M F, LaHoz C, et al. Gravity wave initiation of equatorial spread-F: a case study. J. Geophys. Res., 1981, 86(A11): 9087-9100.
[3]  Kelley M C. Equatorial spread-F: recent results and outstanding problems. J. Atmos. Terr. Phys., 1985, 47(8-10): 745-752.
[4]  Ossakow S L, Zalesak S T, McDonald B E, et al. Nonlinear equatorial spread-F: Dependence on altitude of the F peak and bottomside background electron density gradient scale length. J. Geophys. Res., 1979, 84(A1): 17-29.
[5]  谢红, 肖佐. 中低纬spread-F的数值模拟. 地球物理学报, 1993, 36(1): 18-26. Xie H, Xiao Z. Numerical simulation of spread-F in low and mid-latitudes. Chinese J. Geophys. (in Chinese), 1993, 36(1): 18-26.
[6]  Bilitza D, Reinisch B W. International reference ionosphere 2007: improvements and new parameters. Adv. Space Res., 2008, 42(4): 599-609.
[7]  Picone J M, Hedin A E, Drob D P, et al. Enhanced empirical models of the thermosphere. Physics and Chemistry of the Earth Part C, 2000, 25(5): 531-542.
[8]  谢红, 刘滨莎, 肖佐. 中性风在中低纬spread-F中的作用. 北京大学学报(自然科学版), 1996, 32(1): 78-88. Xie H, Liu B S, Xiao Z. The role of neutral wind in spread-F of low and mid-latitudes. Acta Scicentiarum Naturalum Universitis Pekinesis (in Chinese), 1996, 32(1): 78-88.
[9]  Booker H G, Wells H W. Scattering of radio waves in the F-region of the ionosphere. Terr. Magn. Atmos. Electr., 1938, 43(3): 249-256.
[10]  Ossakow S L. Spread-F theories-a review. J. Atmos. Terr. Phys., 1981, 43(5-6): 437-452.
[11]  Hysell D L, Kelley M C, Swartz W E, et al. Seeding and layering of equatorial spread F by gravity waves. J. Geophys. Res., 1990, 95(A10): 17253-17260.
[12]  黄朝松, 李钧, Kelley M C. 大气重力波产生大尺度赤道扩展F的理论. 地球物理学报, 1994, 37(2): 147-156. Huang C S, Li J, Kelley M C. A theory of large scale equatorial spread F initiated by atmospheric gravity waves. Chinese J. Geophys. (in Chinese), 1994, 37(2): 147-156.
[13]  肖赛冠, 史建魁, 肖佐. 声重波触发中纬扩展F的种子作用 的观测研究. 中国地球物理学会第二十三届年会论文集, 2007. Xiao S G, Shi J K, Xiao Z. Observation of seed effects of mid-latitude spread-F initiated by atmospheric gravity waves. The 23th Annual Meeting of the Chinese Geophysical Society, 2007.
[14]  Zalesak S T, Ossakow S L. Nonlinear equatorial spread-F: Spatially large bubbles resulting from large horizontal scale initial perturbations. J. Geophys. Res., 1980, 85(A5): 2131-2142.
[15]  黄朝松. 电场产生的赤道扩展F的时空演变. 地球物理学报, 1996, 39(3): 296-305. Huang C S. Spatial and temporal evolution of equatorial spread F generated by electric fields. Chinese J. Geophys. (in Chinese), 1996, 39(3): 296-305.
[16]  Zalesak S T, Ossakow S L, Chaturvedi P K. Nonlinear equatorial spread F: The effect of neutral winds and background Pedersen conductivity. J. Geophys. Res., 1982, 87(A1): 151-166.
[17]  Sultan P J. Chemical release experiments to induce F region ionospheric plasma irregularities at the magnetic equator. Boston: Boston University, 1994.
[18]  傅竹风, 胡友秋. 空间等离子体数值模拟. 合肥: 安徽科学技术出版社, 1995. Fu Z F, Hu Y Q. Numerical Simulation of Space Plasma (in Chinese). Hefei: Anhui Science and Technology Press, 1995.
[19]  Zalesak S T. Fully multidimensional flux-corrected transport algorithms for fluids. J. Comput. Phys., 1979, 31(3): 335-362.

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