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Volumn 301, Issue 5629, 2003, Pages 88-91

Increase in the export of alkalinity from North America's largest river

Author keywords

[No Author keywords available]

Indexed keywords

ALKALINITY; CARBON; CARBONATES; CATCHMENTS;

EID: 0038048386     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1083788     Document Type: Article
Times cited : (305)

References (46)
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    • note
    • -1, remembering that 1 mg of CACO3 (as reported by the USGS) is 2 mg of dissolved bicarbonate because of the charge difference between carbonate and bicarbonate.
  • 30
    • 0038740271 scopus 로고    scopus 로고
    • note
    • Alkalinity export was calculated by multiplying annual average alkalinity concentrations by annual average discharge. We also estimated annual export according to the conventions of Goolsby and Battaglin (41). Using their conventions, we calculated fluxes that were slightly higher than our method (∼10%). The slopes of the increase in alkalinity export over the 47-year study period, and the predicted increase in alkalinity export, were virtually indistinguishable, with the Goolsby and Battaglin method being 0.2% smaller than our method. Thus, our method compares well with previous methods.
  • 31
    • 0037726191 scopus 로고    scopus 로고
    • note
    • -, which is responsible for ∼69% of the anion increase. The anion increase is well balanced by a reciprocal increase in cation flux, with the cation flux being 8% higher than the anion flux and well within the error for the combined estimates. The increase in cation flux is dominated by calcium and magnesium, which are responsible for 45 and 36% of the cation flux increase, respectively.
  • 35
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    • S. Pacala et al., Science 292, 2316 (2001).
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  • 46
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    • note
    • We thank D. Flowers of the USGS, who was extremely helpful in helping us compile all discharge data presented in this paper; J. Milliman for his helpful review and advice; and K. Turekian for numerous conversations on the subject. Financial support was provided in part by NSF. This paper is a contribution to the Yale School of Forestry and Environmental Studies and the Institute of Ecosystem Studies.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.