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
Mingyi Yang
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Fengbao Zhang;Bo Zhang;Mingyi Yang

文献摘要

参考文献

被引文献

相似文献

铍-7是一种潜在的强有力的土壤侵蚀示踪剂,但在中国黄土高原的7 Be大气沉降和相关的土壤库存的信息是不容易获得的。2010 - 2012年,在黄土高原北方不同采样时间,对原状土壤中7 Be的含量进行了连续3年的测量,并估算了原状土壤中7 Be的沉降通量和每日7 Be含量。在此期间,7 Be的年沉降通量在1303 ± 119和2222 ± 147 Bq m−2之间变化,平均值为1759 ± 416 Bq m−2。7 Be沉降通量具有明显的季节性,夏季最大,约占年沉降通量的50%,冬季最小,约占年沉降通量的5%。降水量可以解释70%以上的7 Be沉降通量的变化,降尘、露和霜对研究区7 Be沉降通量的贡献较大。原状土壤中的每日7 Be存量随时间变化显著,范围在89.2和941.8 Bq m− 2之间,平均值为392 ± 210 Bq m−2。全年呈单峰分布,8月或9月最高,冬末或早春最低。
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.
DOI: 10.1029/jc079i030p04481
发表时间: 1974-10
影响因子: --
作者:
J. Young;W. Silker
通讯作者: J. Young;W. Silker
DOI: --
发表时间: 2008
期刊: Journal of Desert Research
影响因子: --
作者:
Wang Xun-ming
通讯作者: Wang Xun-ming
DOI: 10.1029/jc081i006p01056
发表时间: 1976-02
影响因子: --
作者:
H. E. Moore;S. E. Poet
通讯作者: H. E. Moore;S. E. Poet
DOI: 10.1029/2007jd009160
发表时间: 2008-06
影响因子: --
作者:
U. Heikkilä;J. Beer;V. Alfimov
通讯作者: U. Heikkilä;J. Beer;V. Alfimov
DOI: 10.1007/bf00052708
发表时间: 1989-05
影响因子: 2
作者:
M. Harvey;K. M. Matthews
通讯作者: M. Harvey;K. M. Matthews