Multi-station synthesis of early twentieth century surface atmospheric electricity measurements for upper tropospheric properties
Multi-station synthesis of early twentieth century surface atmospheric electricity measurements for upper tropospheric properties
复制标题
二十世纪初对流层上层特性的表面大气电测量的多站综合
DOI：
10.5194/adgeo-13-17-2007
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发表时间：
2007
影响因子：
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通讯作者：
A. Bennett
中科院分区：
文献类型：
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作者：
R. Harrison;A. Bennett
抽象的。全球大气电路中的垂直柱状电流密度取决于局部柱状电阻。提出了一个简单的柱状阻力模型，该模型将对流层上层宇宙线分量与局部边界层分量分离，并通过地面空气电导率测量计算出边界层分量。这一理论被证明提供了与观测结果合理的一致性。简单柱状模型理论的一个应用是为综合几个欧洲站点同时进行的地面大气电学测量提供基础。假设电离层电势在所有位置上是公共的，通过外推可以得到在没有边界层柱状电阻的情况下存在的理论空-地电流密度。这表示自由对流层极限气地流密度J0。使用1909年的早期地面数据，当时没有电离层电位数据可供佐证，发现J0为~6Pam−2，尽管这受到数据的不确定性和理论的局限性的影响。后来(1966-1971)欧洲气球和地面数据给出J0=2.4Pam−2。
Abstract. The vertical columnar current density in the global atmospheric electrical circuit depends on the local columnar resistance. A simple model for the columnar resistance is suggested, which separates the local boundary layer component from the upper troposphere cosmic ray component, and calculates the boundary layer component from a surface measurement of air conductivity. This theory is shown to provide reasonable agreement with observations. One application of the simple columnar model theory is to provide a basis for the synthesis of surface atmospheric electrical measurements made simultaneously at several European sites. Assuming the ionospheric potential to be common above all the sites, the theoretical air-earth current density present in the absence of a boundary layer columnar resistance can be found by extrapolation. This is denoted the free troposphere limit air-earth current density, J0. Using early surface data from 1909 when no ionospheric potential data are available for corroboration, J0 is found to be ~6 pA m−2, although this is subject to uncertainties in the data and limitations in the theory. Later (1966–1971) European balloon and surface data give J0=2.4 pA m−2.