| A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time | |
Chen Jiacun1,3 ; Zhang Xinbao1; Navas Ana2; Wen Anbang1; Wang Xiaoxiao1; Zhang Runchuan1
| |
| Corresponding Author | Navas, Ana(anavas@eead.csic.es) |
| 2020 | |
| Source Publication | JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
 |
| ISSN | 0265-931X |
| EISSN | 1879-1700 |
| Volume | 212Pages:106124 |
| Subtype | Article |
| Contribution Rank | 1 |
| Abstract | This paper reports work exploring the potential for using the natural fallout radionuclide Pb-210(ex) to date moraine soils for tracing glacier retreat. Based on the physical processes of Pb-210(ex) deposition, decay and losses due to runoff, a(210)Pb(ex) accumulation-decay model (A(n) = I[1-lambda(n+1)/1-lambda - b(c(n+1)-lambda(n+1))/c-lambda] was developed, where An = Pb-210(ex) inventory (Bq.m(-2)); I = annual inventory of Pb-210(ex) deposition (Bq.m(-2)); lambda = (210) Pb decay coefficient (0.969); n = time span (years); b and c = Pb-210(ex) loss coefficients for the runoff pathway. Furthermore, Cs-137 was used to identify the ages of the study sites and to support the Pb-210(ex) model results. The model was validated with data obtained from the Hailuogou Glacier Valley, Mt. Gongga, in 2016, where nine glacier retreat moraine points YID,exwere recorded from 1910 to 1990 along a retreat length of 1750 m in the valley. Pb-210(ex) 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 Pb-210(ex) 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 Pb-210(ex) 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. |
| Keyword | Pb-210(ex) accumulation-decay model Cs-137 Dating moraine soils Glacier retreat time Hailuogou glacier China |
| DOI | 10.1016/j.jenvrad.2019.106124 |
| Indexed By | SCI |
| WOS Keyword | SEDIMENT BUDGET ; FINGERPRINTING CHANGES ; HAILUOGOU GLACIER ; GONGGA MOUNTAIN ; ORGANIC-MATTER ; CATCHMENT ; EROSION ; RATES ; AGROECOSYSTEMS ; TEMPERATURE |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[41873025] ; International Atomic Energy Agency (IAEA)[INT5153] |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000510973800003 |
| Funding Organization | National Natural Science Foundation of China ; International Atomic Energy Agency (IAEA) |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/33874 |
| Collection | 山地表生过程与生态调控重点实验室 科技与合作处 |
| Corresponding Author | Navas Ana |
| Affiliation | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China; 2.CSIC, EEAD, Spanish Natl Res Council, Avda Montanana 1005, Zaragoza 50059, Spain; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Recommended Citation GB/T 7714 | Chen Jiacun,Zhang Xinbao,Navas Ana,et al. A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2020,212:106124. |
| APA | Chen Jiacun,Zhang Xinbao,Navas Ana,Wen Anbang,Wang Xiaoxiao,&Zhang Runchuan.(2020).A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,212,106124. |
| MLA | Chen Jiacun,et al."A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 212(2020):106124. |
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| 1-s2.0-S0265931X1930（1832KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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