IMHE OpenIR  > 山地表生过程与生态调控重点实验室
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 AuthorNavas, Ana(anavas@eead.csic.es)
2020
Source PublicationJOURNAL OF ENVIRONMENTAL RADIOACTIVITY
ISSN0265-931X
EISSN1879-1700
Volume212Pages:106124
SubtypeArticle
Contribution Rank1
AbstractThis 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.
KeywordPb-210(ex) accumulation-decay model Cs-137 Dating moraine soils Glacier retreat time Hailuogou glacier China
DOI10.1016/j.jenvrad.2019.106124
Indexed BySCI
WOS KeywordSEDIMENT BUDGET ; FINGERPRINTING CHANGES ; HAILUOGOU GLACIER ; GONGGA MOUNTAIN ; ORGANIC-MATTER ; CATCHMENT ; EROSION ; RATES ; AGROECOSYSTEMS ; TEMPERATURE
Language英语
Funding ProjectNational Natural Science Foundation of China[41873025] ; International Atomic Energy Agency (IAEA)[INT5153]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000510973800003
Funding OrganizationNational Natural Science Foundation of China ; International Atomic Energy Agency (IAEA)
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://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 AuthorNavas Ana
Affiliation1.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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