DOI: 10.1002/2015GL066983
论文题名: 87Sr/86Sr as a quantitative geochemical proxy for 14C reservoir age in dynamic, brackish waters: Assessing applicability and quantifying uncertainties
作者: Lougheed B.C. ; Van Der Lubbe H.J.L. ; Davies G.R.
刊名: Geophysical Research Letters
ISSN: 0094-9471
EISSN: 1944-9202
出版年: 2016
卷: 43, 期: 2 起始页码: 735
结束页码: 742
语种: 英语
英文关键词: 87Sr/86Sr
; brackish
; GIS
; proxy
; radiocarbon
; reservoir age
; strontium
Scopus关键词: Geochronology
; Geographic information systems
; Strontium
; Uncertainty analysis
; Behavioral process
; Brackish
; Estuarine environments
; Geochemical proxies
; Proxy
; Radiocarbon
; Spatio-temporal variation
; Species specifics
; Reservoirs (water)
; assessment method
; brackish water
; estuarine environment
; geochronology
; GIS
; mollusc
; paleoclimate
; radiocarbon dating
; reservoir
; shell
; strontium
; Atlantic Ocean
; Baltic Sea
; Mollusca
英文摘要: Accurate geochronologies are crucial for reconstructing the sensitivity of brackish and estuarine environments to dynamic external impacts of the past. Radiocarbon (14C) dating is commonly used for palaeoclimate studies, but its application in brackish environments is severely limited by an inability to quantify spatiotemporal variations in 14C reservoir age, or R(t), due to dynamic interplay between river runoff and marine water. Additionally, old carbon effects and species-specific behavioral processes also influence 14C ages. Using the world's largest brackish water body (the estuarine Baltic Sea) as a test bed, combined with a comprehensive approach that objectively excludes both old carbon (using GIS) and species-specific 14C effects, we demonstrate the use of 87Sr/86Sr ratios for quantifying R(t) in ubiquitous mollusc shell material, leading to almost an order of magnitude increase in Baltic Sea 14C geochronological precision over the current state of the art. We propose that similar proxy methods can be developed for other brackish water bodies worldwide. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956856801&doi=10.1002%2f2015GL066983&partnerID=40&md5=c7df6c5adbc5aecf5bc9e61b91e433ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10434
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
Recommended Citation:
Lougheed B.C.,Van Der Lubbe H.J.L.,Davies G.R.. 87Sr/86Sr as a quantitative geochemical proxy for 14C reservoir age in dynamic, brackish waters: Assessing applicability and quantifying uncertainties[J]. Geophysical Research Letters,2016-01-01,43(2).