DOI: 10.1002/2015GL065003
论文题名: Spreading of Greenland meltwaters in the ocean revealed by noble gases
作者: Beaird N. ; Straneo F. ; Jenkins W.
刊名: Geophysical Research Letters
ISSN: 0094-9242
EISSN: 1944-8973
出版年: 2015
卷: 42, 期: 18 起始页码: 7705
结束页码: 7713
语种: 英语
英文关键词: fjord
; glacial melt
; Greenland
; meltwater
; noble gases
; tracers
Scopus关键词: Glacial geology
; Oceanography
; Radioactive tracers
; Runoff
; Submarines
; Uncertainty analysis
; Entrainment ratio
; fjord
; Glacial meltwater
; Greenland
; Intermediate layers
; meltwater
; Multiparameter analysis
; Surface layers
; Inert gases
; deep water
; fjord
; meltwater
; noble gas
; oceanography
; radiography
; tracer
; Arctic
; Greenland
英文摘要: We present the first noble gas observations in a proglacial fjord in Greenland, providing an unprecedented view of surface and submarine melt pathways into the ocean. Using Optimum Multiparameter Analysis, noble gas concentrations remove large uncertainties inherent in previous studies of meltwater in Greenland fjords. We find glacially modified waters with submarine melt concentrations up to 0.66 ± 0.09% and runoff 3.9 ± 0.29%. Radiogenic enrichment of Helium enables identification of ice sheet near-bed melt (0.48 ± 0.08%). We identify distinct regions of meltwater export reflecting heterogeneous melt processes: a surface layer of both runoff and submarine melt and an intermediate layer composed primarily of submarine melt. Intermediate ocean waters carry the majority of heat to the fjords' glaciers, and warmer deep waters are isolated from the ice edge. The average entrainment ratio implies that ocean water masses are upwelled at a rate 30 times the combined glacial meltwater volume flux. © 2015 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945231604&doi=10.1002%2f2015GL065003&partnerID=40&md5=e25d14f93593870a0e908b76fbbdbf56
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8858
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 Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Recommended Citation:
Beaird N.,Straneo F.,Jenkins W.. Spreading of Greenland meltwaters in the ocean revealed by noble gases[J]. Geophysical Research Letters,2015-01-01,42(18).