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基于西藏羊八井宇宙线观测站在2006年3月至2011年6月期间记录的近地大气电场数据, 分析研究了该地区近地晴天大气电场气象效应和时间变化特征. 气象效应分析结果显示, 该地区近地晴天大气电场与三个气象参量(大气压强、温度和相对湿度)的长时间变化趋势基本一致, 并有明显的季节效应. 冬春季, 大气电场强度整体水平相对较低, 约为0.14 kV/m; 夏秋季, 电场强度水平相对较高, 为0.18 kV/m左右. 近地晴天大气电场强度与大气温度间的线性相关性最强, 拟合相关系数达到0.89; 与大气压强和相对湿度间的线性相关性相对较弱, 拟合相关系数依次为0.43和0.53. 傅里叶分析结果表明: 晴天大气电场时间变化受太阳日周期、半太阳日周期及其三、四次谐波分量调制作用, 调制强度依次减弱. 西藏地区近地晴天大气电场日变化特征呈大陆简单型, 即双峰双谷. 主、次峰谷分别出现在白天和夜间, 主峰谷出现的早晚因季节不同略有差异, 次峰谷出现的早晚因季节不同差异相对较大.Based on the fair weather atmospheric electric field recorded by YBJ Cosmic Ray Station located at the YBJ High Altitude Cosmic Ray Laboratory (90° 31'50" E, 30° 06'38" N, 4300 m a.s.l., 606 g/cm2), Tibet, China, its meteorological effects and time variations are studied. The analysis in this paper is to look into how the factors like atmospheric pressure, temperature and relative humidity in the presence of the meteorological factors in four seasons govern the fair weather atmospheric electric field at the site of measurement. The results of meteorological effects show that there is a strong positive correlation between the fair weather atmospheric electric field and temperature, while a moderate positive correlation is seen between the fair weather atmospheric electric field and the atmospheric pressure, also the relative humidity. The long-term variations of the fair weather atmospheric electric field are affected by seasons. The mean value is higher in summer and fall, but lower in winter and spring. The daily variation of the fair weather atmospheric electric field is modulated by solar diurnal, semi-solar diurnal, and its third and fourth harmonic component. The higher the harmonic frequency, the lower the modulate amplitude is. The daily variation curves show bimodal variation with evening peak and sunrise peak. Two minima can also be seen in early morning and evening. Sunrise peak value is highest during summer and fall, but lowest in spring and winter morning. Sunrise peak occurs at around noon, and evening peak is modulated by the season effects.
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Keywords:
- fair weather atmospheric electric field /
- meteorological effects /
- solar diurnal modulation
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[9] Xu B, Zhang Y, Jia H Y, Chen T L, Yuan A F, Meng X R 2009 Plateau Meteorology 28 314 (in Chinese) [徐斌, 张颖, 贾焕玉, 陈天禄, 袁爱芳, 孟宪茹 2009 高原气象 28 314]
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[11] Zhang Y J, Ge Zh M, Cheng ZH P, Meng Q 1998 Plateau Meteorology 17 135 (in Chinese) [张义军, 葛正谟, 陈成品, 孟青 1998 高原气象 17 135]
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[13] Minamoto Y 2008 Tech. Rep. Kakioka Magn. Observatory 5 11
[14] Minamoto Y, Kadokura A 2011 Polar Science 5 1
[15] Kleimenova N G, Kozyreva O V, Kubicki M, Michnowski S 2010 Geomagn. Aeron. 50 48
[16] Guha A, De B K, Gurubaran S, De S S, Jeeva K 2010 Journal of Earth System Science 119 221
[17] Glynn E F, Chen J, Mushegian A R 2006 Bioinformatics 22 310
[18] Xu B,Yang T, Tan B H, Chen Y 2011 Nuclear Electronics & Detection Technolog 31 702 (in Chinese) [徐斌, 杨涛, 谭保华, 陈益 2011 核电子学与探测技术 31 702]
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[1] Marcz F, Harrison R G 2003 Annales Geophysical 21 2193
[2] Zhao Y, Qie X Sh, Kong X Zh, Zhang T, Yang J, Feng G L, Zhang Q L, Wang D F 2009 Acta Phys. Sin. 58 6616 (in Chinese) [赵阳, 郄秀书, 孔祥贞, 张广庶, 张彤, 杨静, 冯桂力, 张其林, 王东方 2009 58 6616]
[3] Wu M L, Xu J Y, Ma R P 2006 Acta Phys. Sin. 55 5006 (in Chinese) [吴明亮, 徐寄遥, 马瑞平 2006 55 5006]
[4] Bering III E A, Arthur A F, Benbrook J R 2007 Bull. Am. Meteor. Soc. 88 223
[5] Bering E A, Few A A, Benbrook J R 1998 Physics Today 51 24
[6] Israelssona S, Tammetb H 2001 Journal of Atmospheric and Solar-Terrestrial Physics 63 1693
[7] Latha R 2003 Earth Planets Space 55 677
[8] Chen W M 2006 Lei Dian Xue Yuan Li (2nd Ed.) (Beijing: Meteorology Press) p56-68 (in Chinese) [陈渭民 2006 雷电学原理,第二版 (北京: 气象学出版社) 第56-68页]
[9] Xu B, Zhang Y, Jia H Y, Chen T L, Yuan A F, Meng X R 2009 Plateau Meteorology 28 314 (in Chinese) [徐斌, 张颖, 贾焕玉, 陈天禄, 袁爱芳, 孟宪茹 2009 高原气象 28 314]
[10] Hoppel W A 1967 J. Atm. Terrest. Phys. 29 709
[11] Zhang Y J, Ge Zh M, Cheng ZH P, Meng Q 1998 Plateau Meteorology 17 135 (in Chinese) [张义军, 葛正谟, 陈成品, 孟青 1998 高原气象 17 135]
[12] Wilson C T R 1920 Phil. Trans. A 221 73
[13] Minamoto Y 2008 Tech. Rep. Kakioka Magn. Observatory 5 11
[14] Minamoto Y, Kadokura A 2011 Polar Science 5 1
[15] Kleimenova N G, Kozyreva O V, Kubicki M, Michnowski S 2010 Geomagn. Aeron. 50 48
[16] Guha A, De B K, Gurubaran S, De S S, Jeeva K 2010 Journal of Earth System Science 119 221
[17] Glynn E F, Chen J, Mushegian A R 2006 Bioinformatics 22 310
[18] Xu B,Yang T, Tan B H, Chen Y 2011 Nuclear Electronics & Detection Technolog 31 702 (in Chinese) [徐斌, 杨涛, 谭保华, 陈益 2011 核电子学与探测技术 31 702]
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