Production of cosmogenic isotopes 7Be, 10Be, 14C, 22Na, and 36Cl in the atmosphere: Altitudinal profiles of yield functions
Production of cosmogenic isotopes 7Be, 10Be, 14C, 22Na, and 36Cl in the atmosphere: Altitudinal profiles of yield functions
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DOI：
10.1002/2016jd025034
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发表时间：
2016-07-16
影响因子：
4.4
通讯作者：
Usoskin, I. G.
中科院分区：
文献类型：
--
作者：
Poluianov, S. V.;Kovaltsov, G. A.;Usoskin, I. G.
以产量函数表的形式给出了宇宙射线在地球大气中产生的Be-7、Be-10、C-14、Na-22和Cl-36五种宇宙成因放射性同位素的新的一致和精确的计算。第一次，提供了一套详细的生产函数的高度分布，这使得有可能直接应用的结果作为大气传输模型的输入。良好的协议与大多数早期出版的作品柱状和全球同位素生产率。生产的高度剖面图非常重要，特别是对于研究过去的强太阳粒子事件、精确重建长期尺度的太阳活动、使用宇宙成因放射性同位素追踪空气质量动态等任务而言。的计算，图10显示了过去几十年以及公元780年前后极地地区的沉积通量，并与格陵兰和南极冰芯的实际测量结果进行了比较。
New consistent and precise computations of the production of five cosmogenic radioisotopes, Be-7, Be-10, C-14, Na-22, and Cl-36, in the Earth's atmosphere by cosmic rays are presented in the form of tabulated yield functions. For the first time, a detailed set of the altitude profiles of the production functions is provided which makes it possible to apply the results directly as input for atmospheric transport models. Good agreement with most of the earlier published works for columnar and global isotopic production rates is shown. Altitude profiles of the production are important, in particular for such tasks as studies of strong solar particle events in the past, precise reconstructions of solar activity on long-term scale, tracing air mass dynamics using cosmogenic radioisotopes, etc. As an example, computations of the Be-10 deposition flux in the polar region are shown for the last decades and also for a period around 780 A.D. and confronted with the actual measurements in Greenland and Antarctic ice cores.