| DOI: | 10.1002/grl.50160
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| 论文题名: | Inorganic carbon speciation and fluxes in the Congo River |
| 作者: | Wang Z.A.; Bienvenu D.J.; Mann P.J.; Hoering K.A.; Poulsen J.R.; Spencer R.G.M.; Holmes R.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9338
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| EISSN: | 1944-9069
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| 出版年: | 2013
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| 卷: | 40, 期:3 | | 起始页码: | 511
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| 结束页码: | 516
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| 语种: | 英语
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| 英文关键词: | alkalinity
; carbon dioxide
; carbon fluxes
; Congo River
; inorganic carbon
; pH
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| Scopus关键词: | Alkalinity
; Carbon
; Carbonation
; Organic acids
; pH
; Rivers
; Titration
; Carbon fluxes
; Carbonate species
; Carbonic acids
; Dissolved inorganic carbon
; Dissolved organic carbon
; Inorganic carbon
; Seasonal variation
; Total alkalinities
; Carbon dioxide
; alkalinity
; carbon dioxide
; carbon flux
; inorganic carbon
; pH
; seasonal variation
; speciation (chemistry)
; Brazzaville
; Congo
; Congo River
; Democratic Republic Congo
; Kinshasa
; Ville de Kinshasa
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| 英文摘要: | Seasonal variations in inorganic carbon chemistry and associated fluxes from the Congo River were investigated at Brazzaville-Kinshasa. Small seasonal variation in dissolved inorganic carbon (DIC) was found in contrast with discharge-correlated changes in pH, total alkalinity (TA), carbonate species, and dissolved organic carbon (DOC). DIC was almost always greater than TA due to the importance of CO2*, the sum of dissolved CO2 and carbonic acid, as a result of low pH. Organic acids in DOC contributed 11-61% of TA and had a strong titration effect on water pH and carbonate speciation. The CO2* and bicarbonate fluxes accounted for ~57% and 43% of the DIC flux, respectively. Congo River surface water released CO2 at a rate of ~109 mol m-2 yr-1. The basin-wide DIC yield was ~8.84 × 104 mol km-2 yr-1. The discharge normalized DIC flux to the ocean amounted to 3.11 × 1011 mol yr-1. The DOC titration effect on the inorganic carbon system may also be important on a global scale for regulating carbon fluxes in rivers. Key Points The carbonate chemistry near the Congo River mouth is comprehensively studied Organic acids have a titration effect on the inorganic carbon system Surface CO2 and inorganic carbon fluxes to the ocean are characterized ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878182854&doi=10.1002%2fgrl.50160&partnerID=40&md5=ca5e012f0a0a6275c9decba6a881876c
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6602
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, McLean 203, MS#08, Woods Hole, MA 02543, United States
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| Recommended Citation: | |
Wang Z.A.,Bienvenu D.J.,Mann P.J.,et al. Inorganic carbon speciation and fluxes in the Congo River[J]. Geophysical Research Letters,2013-01-01,40(3).
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