Latitudinal distributions of activities in atmospheric aerosols, deposition fluxes, and soil inventories of Be-7 in the East Asian monsoon zone
文献类型: 外文期刊
作者: Gai, N.;Pan, J.;Zhu, X. H.;Tan, K. Y.;Jiao, X. C.;Yang, Y. L.;Yin, X. C.;Yu, H. Q.;Li, Y.
作者机构:
关键词: Be-7;Atmospheric aerosol;Soil inventory;Flux;Latitude;China
期刊名称: JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
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年卷期:
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收录情况: SCI
摘要: Activities of atmospheric aerosols, bulk deposition fluxes, and undisturbed soil inventories of Be-7 were investigated in China's East Asian monsoon zone at various latitudes ranging from 23.8 degrees N to 43.5 degrees N. The annual latitudinal distributions of Be-7 concentrations in aerosols follow a distribution pattern which looks similar to a normal distribution with the maxima occurring in the mid-latitude region. Simultaneous measurements of Be-7 at various latitudes suggest that atmospheric circulation may play an important role in the latitudinal distributions of Be-7 in surface air. Latitude and wet precipitation are the main factors controlling the bulk Be-7 depositional fluxes. Significant seasonal variations in Be-7 depositional fluxes in Beijing, a mid-latitude city, were observed with the highest flux in summer and the lowest in winter, whereas less seasonality were found in the high- and the low-latitude cities. The highest Be-7 inventory in undisturbed soils in summer also occurred at a mid-latitudinal area in the East Asian monsoon zone. Precipitation is the main factor controlling the Be-7 soil inventory in Qingdao with the highest values occurring in autumn followed by summer. (C) 2015 Elsevier Ltd. All rights reserved.
分类号: X
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