Li S W, Li Y S, Tsui K C
Hong Kong Observatory, Environmental Radiation Monitoring and Meteorological Measurements Division, 134A Nathan Road, Kowloon, Hong Kong, China.
J Environ Radioact. 2007;94(2):98-106. doi: 10.1016/j.jenvrad.2007.01.006. Epub 2007 Mar 9.
Upper-air radioactivity soundings have been regularly conducted in Hong Kong since 1994. A total of 38 soundings, measuring the vertical profile of radioactivity in the atmosphere over Hong Kong using on-board Geiger-Müeller tubes, were made during the period 1994-2003 in different seasons and weather conditions. This paper presents the data obtained in Hong Kong and compares the composite vertical profile with observations in other parts of the world. The average Pfotzer maximum over Hong Kong was found to be at an altitude of around 16.1km, lower than those observed at higher latitudes. The variations of the Pfotzer maximum with geomagnetic rigidity and solar activity are discussed. Seasonal and local weather effects on radioactivity in the lower atmosphere were also studied.
自1994年以来，香港定期进行高空放射性探测。1994年至2003年期间，在不同季节和天气条件下，共进行了38次探测，使用机载盖革-米勒计数管测量香港上空大气中放射性的垂直分布。本文介绍了在香港获得的数据，并将合成垂直分布与世界其他地区的观测结果进行了比较。发现香港上空的平均普福策最大值出现在约16.1公里的高度，低于在高纬度地区观测到的值。讨论了普福策最大值随地磁刚度和太阳活动的变化。还研究了低层大气中放射性的季节和局部天气影响。
