DOI: 10.1002/2013GB004678
Scopus记录号: 2-s2.0-84904273889
论文题名: Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean
作者: Jiang Z ; -P ; , Tyrrell T ; , Hydes D ; J ; , Dai M ; , Hartman S ; E
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 7 起始页码: 729
结束页码: 742
语种: 英语
英文关键词: alkalinity
; coastal
; river input
; salinity
; salinity normalization
; surface ocean
Scopus关键词: Alkalinity
; Biomineralization
; Evaporation
; pH
; Rivers
; Tropics
; coastal
; River input
; salinity
; salinity normalization
; Surface ocean
; Oceanography
; alkalinity
; calcification
; calcium carbonate
; evaporation
; open ocean
; river plume
; salinity
; sedimentation
; surface
; Mediterranean Sea
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The variability of total alkalinity (TA) and its relationship with salinity in the tropical and subtropical surface ocean were examined using data collected in various marine environments from a ship of opportunity. In the open ocean regions of the Atlantic, Pacific, and Indian Oceans, sea surface TA variability was observed to be mainly controlled by the simple dilution or concentration (SDC) effect of precipitation and evaporation, and the measured concentrations of TA agreed well with those predicted from salinity and temperature. Non-SDC changes in alkalinity in ocean margins and inland seas were examined by comparing the salinity-normalized alkalinity with that of the open ocean end-member. Non-SDC alkalinity additions to the western North Atlantic margin, eastern North Pacific margin, and Mediterranean Sea were identified, which mainly resulted from river inputs and shelf currents. In contrast, removal of TA through formation and sedimentation of calcium carbonate was observed to be an important control in the Red Sea. The concentration of the river end-member can only be reliably derived from the y intercept of TA-S regression (TAS0) in river-dominated systems such as estuaries and river plumes. In coastal regions where other processes (evaporation, shelf currents, upwelling, calcification, etc.) are more influential, TAS0 can significantly deviate from the river water concentration and hence be an unreliable indicator of it. Negative values of TAS0 can result from non-SDC TA removal at the low salinity end (relative to the salinity of the oceanic end-member) and/or non-SDC TA addition at high salinities (as occurs in the Mediterranean Sea). Key Points Tight TA-salinity relationship and predictable TA in oligotrophic open oceans NTA informs the alkalinity addition/removal in ocean margins and inland seas The intercept of TA-salinity regression could bias the river TA concentration ©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/77489
Appears in Collections: 气候变化事实与影响
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作者单位: National Oceanography Centre, University of Southampton, Southampton, United Kingdom; Ocean College, Zhejiang University, Hangzhou, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
Recommended Citation:
Jiang Z,-P,, Tyrrell T,et al. Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean[J]. Global Biogeochemical Cycles,2014-01-01,28(7)