Relationship between precipitation and Be-10 and impacts on soil dynamics
Relationship between precipitation and Be-10 and impacts on soil dynamics
复制标题
降水与 10Be 的关系及其对土壤动力学的影响
DOI：
10.1016/j.catena.2020.104748
复制
发表时间：
2020
期刊：
影响因子：
6.2
通讯作者：
Possnert Goran
中科院分区：
文献类型：
--
作者：
Chen Peng;Yi Peng;Czymzik Markus;Aldahan Ala;Ljung Karl;Yu Zhongbo;Hou Xiaolin;Zheng Minjie;Chen Xuegao;Possnert Goran
Meteoric beryllium-10 (10Be) is commonly used as a proxy of landscape dynamics (erosion and sedimentation rates) and soil development. Soil represents the first-stage reservoir of meteoric10Be, and variability in the concentration of the isotope in soils may be affected by soil properties and atmospheric deposition. Although many investigations have targeted this issue, there are still problems in estimating the atmospheric input of the isotope in different soil environments. Here, we used10Be data measured in soils distributed across China to explore the potential influence of meteorological and pedological conditions on the isotope concentration and related applications. In addition, to determine the mechanisms controlling10Be concentrations in topsoil on a regional scale, the soil samples were sub-divided into 18 different catchments according to fluvial systems. The results indicated that there were significant negative correlations between precipitation and the soil10Be concentration in high-precipitation regions (>1200 mm·y−1) and significant positive correlations for soils in low precipitation regions (<1200 mm·y−1). The data also revealed that precipitation is the most important variable controlling the10Be concentration in soils of China when compared with the effects of soil properties such as grain size, mineralogy, pH, and cation exchange capacity. Land use and soil erosion may have limited impacts on the distribution of10Be in soils.
