DOI: 10.1002/2013GB004619
Scopus记录号: 2-s2.0-84897352400
论文题名: Calcium carbonate dissolution in the upper 1000 m of the eastern North Atlantic
作者: Barrett P ; M ; , Resing J ; A ; , Buck N ; J ; , Feely R ; A ; , Bullister J ; L ; , Buck C ; S ; , Landing W ; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 4 起始页码: 386
结束页码: 397
语种: 英语
英文关键词: Atlantic Ocean
; suspended particulate matter
Scopus关键词: Calcium
; Calcium carbonate
; Ocean habitats
; Oceanography
; Atlantic Ocean
; Calcium distributions
; Climate variability
; Eastern tropical north atlantic
; High dissolution rate
; Intermediate depths
; Suspended particulate matters
; Upper water column
; Dissolution
; alkalinity
; calcium carbonate
; dissolution
; estimation method
; upper ocean
; water column
; water depth
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Recent analyses suggest that considerable CaCO3 dissolution may occur in the upper water column of the ocean (< 1500 m). This study uses the distribution of particulate calcium from high-resolution suspended matter sampling along the Climate Variability and Predictability/CO2 Repeat Hydrography A16N transect in 2003 to estimate CaCO3 dissolution in the top 1000 m of the North Atlantic. Dissolution rates were also approximated using changes in total alkalinity measurements along isopycnal surfaces. Water masses were found to be undersaturated with respect to aragonite at intermediate depths (400-1000 m) in the eastern tropical North Atlantic. The CaCO 3 dissolution rate in this region is estimated to be 0.9 mmol CaCO3 m-2 d-1, indicating this region is a hotspot for upper water column CaCO3 dissolution compared to the Atlantic basin as a whole. Dissolution rates calculated from particulate calcium distributions outside of this region were significantly lower (0.2 mmol CaCO3 m-2 d-1) and are comparable to previous estimates of CaCO3 dissolution flux for the Atlantic Ocean. The magnitude of upper water column dissolution rates compared to measured surface ocean CaCO3 standing stocks suggests that biologically mediated CaCO3 dissolution may be occurring in the top 1000 m of the Atlantic. Key Points Carbonate dissolution is estimated from particulate Ca distributions Carbonate-undersaturated waters result in attenuated particulate Ca signal High dissolution rates observed in tropical North Atlantic at depths < 1000 m ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77509
Appears in Collections: 气候变化事实与影响
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作者单位: School of Oceanography, University of Washington, Seattle WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle WA, United States; NOAA-Pacific Marine Environmental Laboratory, Seattle WA, United States; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee FL, United States; Skidaway Institute of Oceanography, Savannah GA, United States
Recommended Citation:
Barrett P,M,, Resing J,et al. Calcium carbonate dissolution in the upper 1000 m of the eastern North Atlantic[J]. Global Biogeochemical Cycles,2014-01-01,28(4)