Vertical profile measurements of lower troposphere ionisation
Vertical profile measurements of lower troposphere ionisation
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DOI：
10.1016/j.jastp.2014.08.006
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发表时间：
2014-11
影响因子：
1.9
通讯作者：
R. Harrison;K. Nicoll;K. Aplin
中科院分区：
文献类型：
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作者：
R. Harrison;K. Nicoll;K. Aplin
大气离子产生率的垂直探测是由与常规气象无线电探空仪结合的盖革计数器获得的。在2013-2014年期间从阅读（英国）进行的发射中，再生-普夫策电离最大值位于相当于（63.1±2.4）hPa压力的高度，或以当地空气密度表示，（0.101±0.005）kg m−3。测量的电离配置文件已被评估对Usoskin-Kovaltsov模型，并分别从欧卢的表面中子监测数据。模型电离率与20公里以下高度观测到的宇宙射线电离率吻合得很好。在10公里以上，测得的电离率也与同步中子监测器的数据，虽然，一贯与以前的工作，测得的电离最大值的变异性大于中子监测器发现的。然而，在低层大气（低于5公里的高度），测量和同步中子监测数据之间的协议是穷人。对于与宇宙射线电离有关的瞬变低层大气现象的研究，这表明需要进行现场电离测量和改进低层大气参数化。
Vertical soundings of the atmospheric ion production rate have been obtained from Geiger counters integrated with conventional meteorological radiosondes. In launches made from Reading (UK) during 2013–2014, the Regener–Pfotzer ionisation maximum was at an altitude equivalent to a pressure of (63.1±2.4) hPa, or, expressed in terms of the local air density, (0.101±0.005) kg m−3. The measured ionisation profiles have been evaluated against the Usoskin–Kovaltsov model and, separately, surface neutron monitor data from Oulu. Model ionisation rates agree well with the observed cosmic ray ionisation below 20 km altitude. Above 10 km, the measured ionisation rates also correlate well with simultaneous neutron monitor data, although, consistently with previous work, measured variability at the ionisation maximum is greater than that found by the neutron monitor. However, in the lower atmosphere (below 5 km altitude), agreement between the measurements and simultaneous neutron monitor data is poor. For studies of transient lower atmosphere phenomena associated with cosmic ray ionisation, this indicates the need for in situ ionisation measurements and improved lower atmosphere parameterisations.