Factors controlling the rate of CaCO3 precipitation on Great Bahama Bank

Wallace S. Broecker, Chris Langdon, Taro Takahashi, Tsung Hung Peng

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32 Scopus citations

Abstract

Measurements by Langdon et al. [2000] in the man-made mesocosm coral reef at Biosphere 2's ocean reveal a strong dependence of calcification rate on the degree of supersaturation of CaCO3 in seawater. A similar trend was previously encountered on the Bahama Banks, where Halimeda and other calcifiers are likely responsible for aragonite precipitation [Broecker and Takahashi, 1966]. In this paper we compare these two sets of results and conclude that the dependence on saturation state is significant but less strong in the Bahamas. However, it must be kept in mind that to some extent, the reduction in CaCO3 precipitation on the Bahama Banks may be due to impact of higher salinity on the growth of the calcifying algae. However, if, as many sedimentologists are convinced, the precipitation of CaCO3 on the Bahama Banks is inorganic [Macintyre and Reid, 1992; Milliman et al., 1993], then the comparison of the Bahamas and Biosphere 2 results for dependence of calcification rate on saturation state is telling us something quite different.

Original languageEnglish (US)
Pages (from-to)589-596
Number of pages8
JournalGlobal Biogeochemical Cycles
Volume15
Issue number3
DOIs
StatePublished - Oct 22 2001

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ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Environmental Science(all)
  • Atmospheric Science

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