Beryllium-7 atmospheric deposition and soil inventory on the northern Loess Plateau of China
Beryllium-7 atmospheric deposition and soil inventory on the northern Loess Plateau of China
复制标题
黄土高原北部Beryll-7大气沉降和土壤存量
DOI:
10.1016/j.atmosenv.2013.05.002
复制
发表时间:
2013-10
影响因子:
5
通讯作者:
Mingyi Yang
中科院分区:
文献类型:
--
作者:
Fengbao Zhang;Bo Zhang;Mingyi Yang
Beryllium-7 is a potentially powerful tracer of soil erosion, but information on7Be atmospheric deposition and associated soil inventories on the Loess Plateau of China is not readily available. In the study reported in this paper, we measured the7Be inventories in undisturbed soil at different sampling times on the northern Loess Plateau of China for three years, between 2010 and 2012, and estimated the7Be deposition fluxes and the daily7Be inventories in undisturbed soil. The annual7Be deposition fluxes during this period varied between 1303 ± 119 and 2222 ± 147 Bq m−2, with a mean of 1759 ± 416 Bq m−2. There is a marked seasonality for the7Be deposition fluxes with the maximum in summer, approximately 50% to the annual deposition flux, and the minimum in winter, approximately 5% to the annual deposition flux. Precipitation amounts can explain more than 70% of the variation in7Be deposition flux.7Be deposition in the form of dustfall, dew and frost make a significant contribution to the7Be deposition flux in the study region. The daily7Be inventories in undisturbed soil varied markedly through time and ranged between 89.2 and 941.8 Bq m−2with a mean of 392 ± 210 Bq m−2. They demonstrated a unimodal distribution over the year, with the highest values in August or September and the lowest in late winter or early spring.
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通讯作者:
J. Young;W. Silker
DOI:
--
发表时间:
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期刊:
Journal of Desert Research
影响因子:
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