A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time
文献类型:期刊论文
作者 | Jiacun Chen1,3; Xinbao Zhang1; Ana Navas2; Anbang Wen1; Xiaoxiao Wang1; Runchuan Zhang1 |
刊名 | Journal of Environmental Radioactivity |
出版日期 | 2020-02 |
卷号 | 212期号:1页码:106124 |
ISSN号 | 0265-931X |
关键词 | 210pbex Accumulation-decay Model 137cs Glacier Retreat Time Dating Moraine Soils Hailuogou Glacier China |
DOI | 10.1016/j.jenvrad.2019.106124 |
产权排序 | 1 |
文献子类 | SCI |
英文摘要 | This paper reports work exploring the potential for using the natural fallout radionuclide 210Pbex to date moraine soils for tracing glacier retreat. Based on the physical processes of 210Pbex deposition, decay and losses due to runoff, a 210Pbex accumulation-decay model (An=I1-λn+11-λ-b(cn+1-λn+1)c-λ ) was developed, where An= 210Pbex inventory (Bq·m-2); I = annual inventory of 210Pbex deposition (Bq·m-2); λ = 210Pb decay coefficient (0.969); n = time span (years); b and c = 210Pbex loss coefficients for the runoff pathway. The model was validated with data obtained from the Hailuogou Glacier Valley, Mt. Gongga, in 2016, where nine glacier retreat moraine points were recorded from 1910–1990 along a retreat length of 1750 m in the valley. 210Pbex inventories increased from 3,669.6 ± 218.5 Bq·m-2 at the site where the glacier retreated in 1990 to 10,718.9 ± 167.4 Bq·m-2 in 1910. The coefficients of b = 0.6006 and c = 0.9764 were derived from the 210Pbex inventories at the nine sites with recorded glacier retreat times that were marked with special stone and terrain features. The goodness-of-fit (GOF) for the model predictions of glacier retreat times is 65.5%. The results obtained confirm that the fallout radionuclide 210Pbex has potential for dating moraine soils in other cryosphere regions throughout the world as well as for other types of records forming sedimentary landform sequences such as soils on debris flows and alluvial fans. |
语种 | 英语 |
源URL | [http://ir.imde.ac.cn/handle/131551/32305] |
专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 科技与合作处 |
通讯作者 | Ana Navas |
作者单位 | 1.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China 2.Estación Experimental de Aula Dei, Spanish National Research Council (EEAD-CSIC), Avda. Montañana 1005, Zaragoza, 50059, Spain 3.University of Chinese Academy of Sciences, Beijing, 100049, China |
推荐引用方式 GB/T 7714 | Jiacun Chen,Xinbao Zhang,Ana Navas,et al. A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time[J]. Journal of Environmental Radioactivity,2020,212(1):106124. |
APA | Jiacun Chen,Xinbao Zhang,Ana Navas,Anbang Wen,Xiaoxiao Wang,&Runchuan Zhang.(2020).A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time.Journal of Environmental Radioactivity,212(1),106124. |
MLA | Jiacun Chen,et al."A study on a 210Pbex accumulation-decay model for dating moraine soils to trace glacier retreat time".Journal of Environmental Radioactivity 212.1(2020):106124. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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