DOI: 10.1002/2014GL061684
论文题名: Estimating the benthic efflux of dissolved iron on the Ross Sea continental shelf
作者: Marsay C.M. ; Sedwick P.N. ; Dinniman M.S. ; Barrett P.M. ; Mack S.L. ; McGillicuddy D.J. ; Jr.
刊名: Geophysical Research Letters
ISSN: 0094-9618
EISSN: 1944-9349
出版年: 2014
卷: 41, 期: 21 起始页码: 7576
结束页码: 7583
语种: 英语
英文关键词: continental shelf
; dissolved iron
; Ross Sea
Scopus关键词: Iron
; Circulation models
; Constrained source
; Continental margin
; Continental shelves
; Dissolved iron
; High resolution
; Primary production
; Ross Sea
; Dissolution
; benthic flux
; concentration (composition)
; continental shelf
; dissolved matter
; eutrophic environment
; iron
; primary production
; seafloor
; sediment chemistry
; Ross Sea
; Southern Ocean
英文摘要: Continental margin sediments provide a potentially large but poorly constrained source of dissolved iron (dFe) to the upper ocean. The Ross Sea continental shelf is one region where this benthic supply is thought to play a key role in regulating the magnitude of seasonal primary production. Here we present data collected during austral summer 2012 that reveal contrasting low surface (0.08 ± 0.07 nM) and elevated near-seafloor (0.74 ± 0.47 nM) dFe concentrations. Combining these observations with results from a high-resolution physical circulation model, we estimate dFe efflux of 5.8 × 107 mol yr-1 from the deeper portions (>400 m) of the Ross Sea continental shelf; more than sufficient to account for the inferred "winter reserve" dFe inventory at the onset of the growing season. In addition, elevated dFe concentrations observed over shallower bathymetry suggest that such features provide additional inputs of dFe to the euphotic zone throughout the year. Key Points Highest Ross Sea dFe concentrations are found within 50 m of the seafloorAnnual dFe efflux from the continental shelf in the Ross Sea is estimatedShallower shelf areas supply additional episodic inputs of Fe to surface waters ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912094686&doi=10.1002%2f2014GL061684&partnerID=40&md5=1a2fc1e5bfbd1bf9c4128a14ee480f62
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6882
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Ocean, Earth and Atmospheric Sciences, Old Dominion University, Norfolk, VA, United States
Recommended Citation:
Marsay C.M.,Sedwick P.N.,Dinniman M.S.,et al. Estimating the benthic efflux of dissolved iron on the Ross Sea continental shelf[J]. Geophysical Research Letters,2014-01-01,41(21).