DOI: 10.1002/2016GL068805
论文题名: Determining groundwater Ra end-member values for the estimation of the magnitude of submarine groundwater discharge using Ra isotope tracers
作者: Cho H.-M. ; Kim G.
刊名: Geophysical Research Letters
ISSN: 0094-9109
EISSN: 1944-8840
出版年: 2016
卷: 43, 期: 8 起始页码: 3865
结束页码: 3871
语种: 英语
英文关键词: radium-226
; radium-228
; saline groundwater
; submarine groundwater discharge
; subterranean estuary
Scopus关键词: Aquifers
; Discharge (fluid mechanics)
; Groundwater
; Groundwater resources
; Hydrogeology
; Isotopes
; Submarines
; Radium-226
; Radium-228
; Saline groundwater
; Submarine groundwater discharge
; Subterranean estuary
; Radium
; coastal aquifer
; discharge
; global ocean
; groundwater
; radium isotope
; saline intrusion
; submarine
; water chemistry
; water quality
; Atlantic Ocean
英文摘要: Radium isotopes (228Ra and 226Ra) are excellent tracers of submarine groundwater discharge (SGD). To estimate SGD magnitudes, information on the end-member values of Ra concentrations in groundwater is critical; however, the distribution characteristics of Ra in coastal aquifers are poorly understood. In this study, we show that Ra concentrations in coastal groundwater are primarily dependent on salinity based on the data (n > 500) obtained from global coastal aquifers, although previous end-member calculations averaged all Ra concentrations without considering salinity. If we assume that SGD is composed mainly of seawater infiltrating the aquifer, previous estimates of SGD for the Atlantic Ocean and the global ocean were overestimated twofold to threefold. This may be similar for other applications using different Ra isotopes. Our study highlights that the end-members of Ra isotopes in groundwater should be carefully considered when estimating SGD using Ra isotope mass balances in the ocean. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968735800&doi=10.1002%2f2016GL068805&partnerID=40&md5=652d21aa39cdf4c3d8864623d3422acb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10072
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: School of Earth and Environmental Sciences/RIO, Seoul National University, Seoul, South Korea
Recommended Citation:
Cho H.-M.,Kim G.. Determining groundwater Ra end-member values for the estimation of the magnitude of submarine groundwater discharge using Ra isotope tracers[J]. Geophysical Research Letters,2016-01-01,43(8).