Geochemical characteristics of Kau Bay water

Weijden, C. H. Van der; Lange, Gert J. de; Middelburg, Jack J.; Sloot, H.A. van der; Hoede, D.; Shofiyah, S.

doi:10.1016/0077-7579(89)90135-x

Cited by 16 publications

(5 citation statements)

References 8 publications

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“…Some of the pro&s for arsenate exhibit sight nutrienttype surface depletion. Surface depletions for arsenate have already been reported for borderland basins (PETERSON and CARPENTER, 1983; VAN DER WEIJDEN et al. 1988), the South Atlantic (STATHAM et al.…”

Section: Arsenicmentioning

confidence: 97%

“…Variations in concentrations of antimonate with location and depth are relatively small. Vertical profiles for dissolved antimonate were hitherto available only for borderland basins such as Kau Bay ( VAN DER WEIJDEN et al, 1988) and Saanich Inlet (BERTINE and LEE, 1983); these profiles also exhibit constant concentrations of antimonate from surface to bottom. The average concentrations of dissolved antimonate found in this study (0.99-1.22 nmol 1-l) are closely similar to values reported in the literature, namely 1.02-1.28 nmol I_' for Saanich Inlet (BERTINE and LEE, 1983) The distribution of antimonite is less regular than that of antimonate in that there is a clear variation with location.…”

Section: Anrimonymentioning

confidence: 99%

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Arsenic, antimony and vanadium in the North Atlantic Ocean

Mlddelburg

Hoede

Sloot

et al. 1988

Geochimica et Cosmochimica Acta

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The presented data for As and V have extended the limited basis for comparison, so that inter-ocean fractionation processes can now be recognized. The concentrations of both As and V show regular increases in the ocean deep water as it passes from the North Atlantic (As 19.0; V 32.6 nmol I-') via the South Atlantic (As 21. I nmol I-') and Indian Ocean (As 22.5; V 35.6 nmol I-') lo the Pacific Ocean (As 24.0; V 36.4 nmol I-'). The magnitude ofbiological recycling for V and As. as deduced from interoceanic fractionation, is consistent with estimates based on particle or algal compositions.

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Section: Arsenicmentioning

confidence: 97%

Section: Anrimonymentioning

confidence: 99%

Arsenic, antimony and vanadium in the North Atlantic Ocean

Mlddelburg

Hoede

Sloot

et al. 1988

Geochimica et Cosmochimica Acta

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“…1). Because water exchange is limited to the upper 30 m, Kau Bay's deep-water temperature and salinity are nearly homogeneous below the mixed layer and refl ect the surface water hydrography outside the bay (Van Aken and Verbeek, 1988; Van der Weijden et al, 1989;Van Riel, 1943) (Figs. 2A-2D).…”

Section: Introductionmentioning

confidence: 99%

3500 yr record of centennial-scale climate variability from the Western Pacific Warm Pool

Langton

Linsley

Robinson

et al. 2008

Geol

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We use geochemical data from a sediment core in the shallowsilled and intermittently dysoxic Kau Bay in Halmahera (Indo nesia, lat 1°N, long 127.5°E) to reconstruct century-scale climate variability within the Western Pacifi c Warm Pool over the past ~3500 yr. Downcore variations in bulk sedimentary δ 15 N appear to refl ect century-scale variability in basin ventilation, attributed to changes in oceanographic conditions related to century-scale fl uctuations in El Niño Southern Oscillation (ENSO). We infer an increase in century-scale El Niño activity beginning ca. 1700 yr B.P. with peaks in El Niño activity ca. 1500 yr B.P., 1150 yr B.P., and ca. 700 yr B.P. The Kau Bay results suggest that there was diminished ENSO amplitude or frequency, or a departure from El Niño-like conditions during the Medieval Warm Period, and distinctive, but steadily decreasing, El Niño activity during and after the Little Ice Age.

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“…Sb(III) has been detected in surface waters where its presence seems to be mainly due to phytoplanktonic activity ( − ). Sb(III) is the main Sb species in anoxic waters ( − ) and porewaters (). Except for highly contaminated areas, Sb concentrations in sediments are in the order of a few μg/g or less.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Early Diagenesis of Antimony Species in Sediments and Porewaters of Freshwater Lakes

Chen

Deng

Filella

et al. 2003

Environ. Sci. Technol.

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The study identifies the role played by different components of natural aquatic systems on the poorly known geochemistry of antimony. Different chemical forms of antimony were measured in porewaters and sediments of two Sudbury lakes characterized by contrasting redox conditions at the sediment-water interface. In porewaters, Sb(III) was present under reducing conditions where it could exist as SbS2- according to thermodynamic calculations. Sb(V) was detected mainly under oxic and mildly reducing environments where its presence was attributed to the oxidizing effect of iron and manganese oxyhydroxides or to the slow kinetics of reduction by dissolved sulfide or possible complexation by it. A third form of Sb identified as refractory was obtained after UV irradiation of the water samples, suggesting an association of Sb to low molecular weight natural organic matter. The distribution of Sb in sediments of the two lakes revealed (through the comparison of profiles and statistical correlations) the importance of iron and manganese oxyhydroxides in controlling the behavior of Sb, particularly in the lake where the interface was clearly oxic. Porewater profiles indicate that the dissolution of manganese and iron oxyhydroxides under anoxic conditions leads to the simultaneous release of dissolved Sb previously sorbed onto those compounds. In reducing sediments, the control of the solubility of Sb by iron sulfides is suggested.

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Geochemical characteristics of Kau Bay water

Cited by 16 publications

References 8 publications

Arsenic, antimony and vanadium in the North Atlantic Ocean

Arsenic, antimony and vanadium in the North Atlantic Ocean

3500 yr record of centennial-scale climate variability from the Western Pacific Warm Pool

Distribution and Early Diagenesis of Antimony Species in Sediments and Porewaters of Freshwater Lakes

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