| H2释放扰动电离层的数值模拟 |
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| 引用本文： | 汪四成,方涵先,杨升高,翁利斌.H2释放扰动电离层的数值模拟[J].大气科学学报,2013,36(4):499-503. |
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| 作者姓名： | 汪四成 方涵先 杨升高 翁利斌 |
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| 作者单位： | 解放军理工大学 气象海洋学院, 江苏 南京 211101;解放军理工大学 气象海洋学院, 江苏 南京 211101;解放军理工大学 气象海洋学院, 江苏 南京 211101;解放军理工大学 气象海洋学院, 江苏 南京 211101 |
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| 基金项目： | 国家自然科学基金资助项目(40505005);解放军理工大学气象海洋学院基础理论基金资助项目 |
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| 摘 要： | 由于电离层中分子性离子与电子的复合要比氧离子与电子的复合快得多,因此H2在电离层高度释放可有效地引起电子的消耗。本文基于一个包括中性气体扩散方程和离子化学反应方程的二维动力学模型,对H2在电离层高度释放过程进行了数值模拟研究,并分析了不同释放条件下的电子扰动特性。结果表明:1)500 mol H2释放后,迅速向周围空间扩散,释放中心处的电子密度30 s内下降了近4%,F2层临界频率下降了1%左右;2)在不同高度处释放H2时,最大的电子密度相对变化率并不是在峰值高度附近处释放时出现的;3)释放化学物质的量越多,电子密度的扰动幅度也越大,但两者之间并不存在线性关系;4)相同量的H2在电离层峰值高度处释放,白天的电子密度扰动幅度要大于夜间的扰动幅度。
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| 关 键 词： | 化学物质释放 电离层人工改变 电离层foF2 |
| 收稿时间： | 2011/9/28 0:00:00 |
| 修稿时间： | 2012/4/24 0:00:00 |
Numerical simulation of ionospheric modification by H2 release |
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| WANG Si-cheng,FANG Han-xian,YANG Sheng-gao and WENG Li-bin.Numerical simulation of ionospheric modification by H2 release[J].大气科学学报,2013,36(4):499-503. |
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| Authors: | WANG Si-cheng FANG Han-xian YANG Sheng-gao and WENG Li-bin |
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| Institution: | College of Meteorology and Oceanography, PLA University of Science & Technology, Nanjing 211101, China;College of Meteorology and Oceanography, PLA University of Science & Technology, Nanjing 211101, China;College of Meteorology and Oceanography, PLA University of Science & Technology, Nanjing 211101, China;College of Meteorology and Oceanography, PLA University of Science & Technology, Nanjing 211101, China |
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| Abstract: | The recombination rate coefficients of molecular ion with electron are several orders greater than those of the dominant atomic oxygen ion in ionosphere F region,so the plasma densities in ionosphere can be greatly depleted by modest amounts of H2 gas released at ionospheric altitudes.Based on a 2-D dynamics model including the neutral gas diffusion equation and the ion chemical reaction equation,this paper simulates the processes of H2 released at ionospheric altitudes and analyzes the changes of ionospheric electron and foF2(critical frequency of F2 layer) at different temporal and spatial release conditions.Results show that:1)500 mol H2 gas released at the ionospheric altitude diffuses swiftly,where the electron density decreases nearly 4% after 30 s and the foF2(critical frequency of F2 layer) decreases about 1%;2)When the same amount of H2 is released at different altitudes,the maximum relative change rate of electron density will not appear when H2 is released nearby the peak altitude of F2 layer(hmF2);3)The more amount of H2 is released,the larger disturbance of electron density is caused,but there is not a linear relation between them;4)The disturbance amplitude of electron density in daytime is larger than that in nighttime when the same amount of H2 released at hmF2. |
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| Keywords: | chemical release artificial ionospheric modification ionospheric foF2 |
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