极区夏季中层尘埃等离子体密度扰动功率谱分析研究
|
摘要
利用北欧火箭探空测量的极区夏季中层尘埃等离子体历史试验数据,采用傅里叶分析方法,计算了不同高度的尘埃密度和电子密度扰动功率谱.数值结果表明,在不同高度尘埃等离子体的扰动功率谱指数存在较大的差异,从功率谱的角度证明了中层顶尘埃等离子体不规则体结构并非都是由中性大气湍流产生的,与实验观测结果相符.研究结果对理解极区夏季中层回波(polar mesopause summer echoes, PMSE)的物理机制具有重要的意义.
The perturbation power spectrums of dust density and electron density at different altitudes in the summer polar mesopause are calculated based on the data of ECT-02 experiment in this paper. Fourier analysis method is applied and the numerical results show that the perturbation power spectrum indices of the dust plasma at different altitudes are quite different. Based on the analysis of the power spectrum, it is proved that the irregular plasma structure at mesopause region is not always generated by neutral atmospheric turbulence, which is consistent with experimental observation results. The results obtained in this paper are of great significance for understanding the physical mechanism of polar mesosphere summer echoes(PMSE).
The perturbation power spectrums of dust density and electron density at different altitudes in the summer polar mesopause are calculated based on the data of ECT-02 experiment in this paper. Fourier analysis method is applied and the numerical results show that the perturbation power spectrum indices of the dust plasma at different altitudes are quite different. Based on the analysis of the power spectrum, it is proved that the irregular plasma structure at mesopause region is not always generated by neutral atmospheric turbulence, which is consistent with experimental observation results. The results obtained in this paper are of great significance for understanding the physical mechanism of polar mesosphere summer echoes(PMSE).
引文
[1] CZECHOWSKY P,RüSTER R,SCHMIDT G.Variations of mesospheric structures in different seasons[J].Geophysical research letters,2013,6(6):459-462.
[2] ECKLUND W L,BALSLEY B B.Long-term observations of the Arctic mesosphere with the MST radar at Poker Flat,Alaska[J].Journal of geophysical research:space physics,1981,86(A9):7775-7780.
[3] CHO J Y N,KELLEY M C,HEINSELMAN C J.Enhancement of Thomson scatter by charged aerosols in the polar mesosphere:measurements with a 1.29-GHz radar[J].Geophysical research letters,1992,19(11):1097-1100.
[4] CHO J Y N,KELLEY M C.Polar mesosphere summer radar echoes:observations and current theories[J].Reviews of geophysics,1993,31(3):243-265.
[5] CHO J Y N,R?TTGER J.An updated review of polar mesosphere summer echoes:observation,theory,and their relationship to noctilucent clouds and subvisible aerosols[J].Journal of geophysical research:atmospheres,1997,102(D2):2001-2020.
[6] CHO J Y N,HALL T M,KELLEY M C.On the role of charged aerosols in polar mesosphere summer echoes[J].Journal of geophysical research:atmospheres,1992,97(D1):875-886.
[7] SHUKLA P K,MAMUN A A.Introduction to dusty plasma physics[M].Bristol and Philadelphis:Institute Physics Publishing,2002.
[8] ANGELIS U D.The physics of dusty plasmas[J].Physica scripta,1992,45 (45):465-474.
[9] LIU H L,HAYS P B,ROBLE R G.A numerical study of gravity wave breaking and impacts on turbulence and mean state[J].Journal of the atmospheric sciences,1999,56(13):2152-2177.
[10] FRITTS D C,ALEXANDER M J.Gravity wave dynamics and effects in the middle atmosphere[J].Reviews of geophysics,2003,41(1):1003,DOI:10.1029/2001RG000106.
[11] R?TTGER J,LA HOZ C,KELLEY M C,et al.The structure and dynamics of polar mesosphere summer echoes observed with the EISCAT 224 MHz radar[J].Geophysical research letters,1988,15(12):1353-1356.
[12] ULWICK J C,BAKER K D,KELLEY M C,et al.Comparison of simultaneous MST radar and electron density probe measurements during STATE[J].Journal of geophysical research:atmospheres,1988,93(D6):6989-7000.
[13] CHO J Y N,ALCALA C M,KELLEY M C,et al.Further effects of charged aerosols on summer mesospheric radar scatter[J].Journal of atmospheric and terrestrial physics,1996,58(6):661-672.
[14] HILL R J.Nonneutral and quasi-neutral diffusion of weakly ionized multiconstituent plasma[J].Journal of geophysical research:space physics,1978,83(A3):989-998.
[15] RAPP M,LüBKEN F J.Polar mesosphere summer echoes (PMSE):review of observations and current understanding[J].Atmospheric chemistry and physics,2004,4(11/12):2601-2633.
[16] RAPP M,LüBKEN F J.On the nature of PMSE:electron diffusion in the vicinity of charged particles revisited[J].Journal of geophysical research:atmospheres,2003,108(D8).DOI:10.1029/2002JD002857
[17] 李辉,吴健,吴军,等.极区夏季中层顶尘埃分层的锐边界结构研究[J].极地研究,2009,21(4):272-278.LI H,WU J,WU J,et al.Study on the sharp boundary of layered dust structure in the summer polar mesopause[J].Chinese journal of polar research,2009,21(4):272-278.(in Chinese)
[18] 李辉,车海琴,吴健,等.基于部分反射理论的Es层电离图描迹研究[J].电波科学学报,2011,26(2):311-315.LI H,CHE H Q,WU J,et al.Ionogram traces of Es layer based on partial reflection theory[J].Chinese journal of radio science,2011,26(2):311-315.(in Chinese)
[19] RAPP M,LüBKEN F J,BLIX T A.Small scale density variations of electrons and charged particles in the vicinity of polar mesosphere summer echoes[J].Atmospheric chemistry and physics,2003,3(5):1399-1407.
[20] OTTERSTEN H.Atmospheric structure and radar backscattering in clear air[J].Radio science,1969,4(12):1179-1193.
[21] TATARSKII V I.The effects of the turbulent atmosphere on wave propagation[J].Jerusalem:Israel Program for Scientific Translations,1971.
[2] ECKLUND W L,BALSLEY B B.Long-term observations of the Arctic mesosphere with the MST radar at Poker Flat,Alaska[J].Journal of geophysical research:space physics,1981,86(A9):7775-7780.
[3] CHO J Y N,KELLEY M C,HEINSELMAN C J.Enhancement of Thomson scatter by charged aerosols in the polar mesosphere:measurements with a 1.29-GHz radar[J].Geophysical research letters,1992,19(11):1097-1100.
[4] CHO J Y N,KELLEY M C.Polar mesosphere summer radar echoes:observations and current theories[J].Reviews of geophysics,1993,31(3):243-265.
[5] CHO J Y N,R?TTGER J.An updated review of polar mesosphere summer echoes:observation,theory,and their relationship to noctilucent clouds and subvisible aerosols[J].Journal of geophysical research:atmospheres,1997,102(D2):2001-2020.
[6] CHO J Y N,HALL T M,KELLEY M C.On the role of charged aerosols in polar mesosphere summer echoes[J].Journal of geophysical research:atmospheres,1992,97(D1):875-886.
[7] SHUKLA P K,MAMUN A A.Introduction to dusty plasma physics[M].Bristol and Philadelphis:Institute Physics Publishing,2002.
[8] ANGELIS U D.The physics of dusty plasmas[J].Physica scripta,1992,45 (45):465-474.
[9] LIU H L,HAYS P B,ROBLE R G.A numerical study of gravity wave breaking and impacts on turbulence and mean state[J].Journal of the atmospheric sciences,1999,56(13):2152-2177.
[10] FRITTS D C,ALEXANDER M J.Gravity wave dynamics and effects in the middle atmosphere[J].Reviews of geophysics,2003,41(1):1003,DOI:10.1029/2001RG000106.
[11] R?TTGER J,LA HOZ C,KELLEY M C,et al.The structure and dynamics of polar mesosphere summer echoes observed with the EISCAT 224 MHz radar[J].Geophysical research letters,1988,15(12):1353-1356.
[12] ULWICK J C,BAKER K D,KELLEY M C,et al.Comparison of simultaneous MST radar and electron density probe measurements during STATE[J].Journal of geophysical research:atmospheres,1988,93(D6):6989-7000.
[13] CHO J Y N,ALCALA C M,KELLEY M C,et al.Further effects of charged aerosols on summer mesospheric radar scatter[J].Journal of atmospheric and terrestrial physics,1996,58(6):661-672.
[14] HILL R J.Nonneutral and quasi-neutral diffusion of weakly ionized multiconstituent plasma[J].Journal of geophysical research:space physics,1978,83(A3):989-998.
[15] RAPP M,LüBKEN F J.Polar mesosphere summer echoes (PMSE):review of observations and current understanding[J].Atmospheric chemistry and physics,2004,4(11/12):2601-2633.
[16] RAPP M,LüBKEN F J.On the nature of PMSE:electron diffusion in the vicinity of charged particles revisited[J].Journal of geophysical research:atmospheres,2003,108(D8).DOI:10.1029/2002JD002857
[17] 李辉,吴健,吴军,等.极区夏季中层顶尘埃分层的锐边界结构研究[J].极地研究,2009,21(4):272-278.LI H,WU J,WU J,et al.Study on the sharp boundary of layered dust structure in the summer polar mesopause[J].Chinese journal of polar research,2009,21(4):272-278.(in Chinese)
[18] 李辉,车海琴,吴健,等.基于部分反射理论的Es层电离图描迹研究[J].电波科学学报,2011,26(2):311-315.LI H,CHE H Q,WU J,et al.Ionogram traces of Es layer based on partial reflection theory[J].Chinese journal of radio science,2011,26(2):311-315.(in Chinese)
[19] RAPP M,LüBKEN F J,BLIX T A.Small scale density variations of electrons and charged particles in the vicinity of polar mesosphere summer echoes[J].Atmospheric chemistry and physics,2003,3(5):1399-1407.
[20] OTTERSTEN H.Atmospheric structure and radar backscattering in clear air[J].Radio science,1969,4(12):1179-1193.
[21] TATARSKII V I.The effects of the turbulent atmosphere on wave propagation[J].Jerusalem:Israel Program for Scientific Translations,1971.