A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time

doi:10.1021/acs.est.0c01667

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	A study on a Pb-210(ex) accumulation-decay model for dating moraine soils to trace glacier retreat time
	Chen Jiacun 1,3; Zhang Xinbao 3; Navas Ana 2; Wen Anbang 3; Wang Xiaoxiao 3; Zhang Runchuan 3
刊名	JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
	2020
卷号	212 页码:8083-8093
关键词	Pb-210(ex) accumulation-decay model Cs-137 Dating moraine soils Glacier retreat time Hailuogou glacier China
ISSN号	0265-931X
DOI	10.1021/acs.est.0c01667
通讯作者	Navas, Ana(anavas@eead.csic.es)
产权排序	1
文献子类	Article
英文摘要	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.
资助项目	National Natural Science Foundation of China[41873025] ; International Atomic Energy Agency (IAEA)[INT5153]
WOS关键词	SEDIMENT BUDGET ; FINGERPRINTING CHANGES ; HAILUOGOU GLACIER ; GONGGA MOUNTAIN ; ORGANIC-MATTER ; CATCHMENT ; EROSION ; RATES ; AGROECOSYSTEMS ; TEMPERATURE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000548584900039
资助机构	National Natural Science Foundation of China ; International Atomic Energy Agency (IAEA)
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33874]
专题	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	Navas Ana
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.CSIC, EEAD, Spanish Natl Res Council, Avda Montanana 1005, Zaragoza 50059, Spain; 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China;
推荐引用方式 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,2020,212:8083-8093.
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,212,8083-8093.
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):8083-8093.