Origin of 222Rn and its long-lived daughters in air over Hawaii
Origin of 222Rn and its long-lived daughters in air over Hawaii
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夏威夷上空空气中 222Rn 及其长寿子体的起源
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
M. Wilkening
中科院分区：
文献类型：
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作者：
H. E. Moore;S. E. Poet;E. Martell;M. Wilkening
在夏威夷迎风一侧的地面空气中测定了222Rn、210Pb、210Bi、210Po和90Sr的浓度。岛的下坡上约四分之三的222Rn来自岛屿表面，而其余的222Rn及其大部分长寿命的放射性子体210Pb、210Bi和210Po来自遥远的大陆源。经计算，气团在岛上的瞬变时间约为13小时，远陆区的过境时间约为15-20天，气溶胶在逆风逆温上下的平均停留时间约为5天和2天。
Concentrations Of 222Rn, 210Pb, 210Bi, 210Po, and 90Sr were determined in surface air on the windward side of Hawaii. About three fourths of the 222Rn on the lower slopes of the island is due to emanation from the island surface, whereas the remainder of the 222Rn and most of its long-lived radioactive daughters, 210Pb, 210Bi, and 210Po, are advected from distant continental sources. The transient time of air masses over the island, the transit time from distant continental regions, and the mean aerosol residence times above and below the trade wind inversion are estimated to be about 13 hours, 15–20 days, and 5 and 2 days, respectively.