The determination of the atomic oxygen concentration and associated parameters in the lower ionosphere
The determination of the atomic oxygen concentration and associated parameters in the lower ionosphere
复制标题
低电离层中原子氧浓度及相关参数的测定
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
N. Twiddy
中科院分区：
文献类型：
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作者：
P. H. G. Dickinson;W. C. Bain;L. Thomas;E. R. Williams;D. B. Jenkins;N. Twiddy
用火箭载灯在130 nm处辐射OI三重态的技术研究了60至140公里高度的原子氧浓度[O]。大气中原子氧的吸收和共振荧光的测量使得能够在这个高度范围内以良好的相对精度确定[O]的绝对值。对分析方法进行了详细的描述。在一些飞行中，曾尝试通过氧化银条来测量[O]，但这种技术没有给出可靠的结果。电子密度Ne的测量是与UV的每一次飞行相关联的。台灯。[O]的最大值出现在95公里附近，其值通常在1-3×1012厘米-3的范围内，远大于理论预测或以往几次测量的结果。它在120公里处的价值也很大，尽管与冯·萨恩的建议一致，即在那个高度[O]/[O2]>；1。然而，在冬季异常强烈的一天，测得一个非常低的[O]峰值，为3×1011厘米-3。冬季120公里以上的原子氧分布的梯度小于扩散平衡的预期梯度；没有夏季的测量报告。通常，在[O]和Ne剖面中观察到的特征之间存在相似之处，并考虑了其中的一些原因。其中一个特征是[O]突然下降到无法检测到的水平，夜间高度下降约83公里；同一地区的Ne也有类似的下降。[O]分布中的某些不规则性具有重力波的尺度大小特征。
The concentrations of atomic oxygen, [O], at heights from 60 to 140 km have been studied by a technique involving the use of a rocket-borne lamp to radiate the Oi triplet at 130 nm. The measurements of both absorption and resonance fluorescence in the atmospheric atomic oxygen have enabled absolute values of [O] to be determined with good relative accuracy over this height range. The method of analysis is described in detail. On some of the flights, attempts were made to measure [O] by oxidation of silver strips, but this technique did not give reliable results. Measurements of electron density, Ne, were obtained in association with each flight of a u.v. lamp. The maximum value of [O] was found to occur near 95 km, and its value was usually in the range 1-3 x 1012 cm-3, rather larger than predicted by theory or found in the few previous measurements. Its value at 120 km was also large, though in agreement with the suggestion of von Zahn that [O]/[O2] > 1 at that height. On a day of intense winter anomaly, however, a very low [O] peak of 3 x 1011 cm-3 was measured. The distribution of atomic oxygen above 120 km in winter showed a gradient smaller than that expected for diffusive equilibrium; no summer measurements are reported. Often there was a similarity between features observed in the [O] and Ne profiles, and some reasons for this are considered. One such feature was the abrupt fall to undetectable levels in [O] with decreasing height around 83 km at night; there was a similar fall in Ne in the same region. Certain irregularities in the [O] distributions have scale sizes characteristic of gravity waves.