OLR (1982) 29 (12) C. Chemical Oceanography 765

The nonlinear model simulates seasonal ocean temperature evolution; net C concentration; dis- solved CO2; bicarbonate, carbonate and H ions; depth of the mixed-layer; and heat and C fluxes at the base of the mixed layer. Model sensitivity to parameter variation is illustrated. (sir)

82:6010 Loring, D.H., 1982. Geochemical factors controlling

the accumulation and dispersal of heavy metals in the Bay of Fundy sediments. Can. J. Earth Sci., 19(5):930-944.

Total concentrations and regional variations of Zn, Cu, Pb, Co, Ni, Cr, V, Be, Hg, As, Ba, and Se are accounted for by natural environmental conditions and processes, with one or two exceptions; a small but significant buildup of non-detrital Pb and Zn near a dredge dispersal site off St. John Harbour may be the effect of industrial pollution. Bedford Inst. of Oceanogr., P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada. (dlf)

82:6011 Mayer, L.M., 1982. Retention of riverine iron in

estuaries. Geochim. cosmochim. Acta, 46(6): 1003-1009.

In 3 Maine estuaries, riverine Fe remained fairly conservative with salinity, implying that flocculation does not necessarily remove Fe; laboratory exper- iments concurred. However, tannery effluent did appear to result in Fe scavenging from estuarine waters. Flocculated riverine Fe increased consid- erably Fe concentrations of estuarine bottom sed- iments, with the amount of Fe per sediment specific surface area dependent on mean river flow entering an estuary. It seems likely that a significant portion of flocculated riverine Fe escapes to shelf waters. Dept. of Geol. Sci., Univ. of Maine, Walpole, Maine 04573, USA.

82:6012 Millward, G.E. and R.M. Moore, 1982. The adsorp-

tion of Cu, Mn and Zn by iron oxyhydroxide in model estuarine solutions. Wat. Res., 16(6):981- 985.

Cu was adsorbed onto fresh iron precipitates throughout the normal range of brackish water salinity and pH; Mn and Zn exhibited decreased adsorption with increased salinity. Results suggest that in estuaries receiving metal-rich waters Cu would associate with Fe precipitates and participate in sedimentation, while Mn and Zn would be found in both solid and dissolved forms with proportions determined primarily by salinity. Dept. of Mar. Sci., Plymouth Polytech., Plymouth PL4 8AA, UK. (sir)

82:6013 Reeburgh, W.S. and R.E. Erickson, 1982. A 'dipstick'

sampler for rapid, continuous chemical profiles in sediments. Limnol. Oceanogr., 27(3):556-559.

Polyacrylamide gels dosed with lead acetate and supported in a Lucite 'dipstick' provide a means of obtaining rapid, continuous depth distributions of sulfide in anoxic marine sediments. Inst. of Mar. Sci., Univ. of Alaska, Fairbanks, Alaska 99701, USA.

82:6014 Scudlark, J.R. and D.L. Johnson, 1982. Biological

oxidation of arsenite in seawater. Estuar. coast. Shelf Sci., 14(6):693-706.

For low levels of arsenite (100 parts 10 -9, 1.3 #M), abiotic oxidation proceeds at a slow, constant rate, as can be predicted from physical and chemical variables only. In the presence of certain aquatic bacteria, however, oxidation is rapid, and the As(III) concentration decreases exponentially with time. Qualitative characteristics of the organisms, en- zyme-substrate relationships and kinetics in relation to chemical, physical and biological variables are studied. Distribution of this phenomenon in natural waters is evaluated, and the importance of bacterial oxidation assessed relative to an overall arsenic budget. Univ. of Delaware, Coll. of Mar. Studies, Lewes, Del. 19958, USA.

82:6015 Takematsu, Noburu, 1981. Enrichment of transition

metals in deep-sea sediments relative to nearshore sediments. Mer, Tokyo, 19(3): 125-131.

The relative enrichment of transition metals in deep-sea sediments is attributed to micro-ferroman- ganese oxides near the sediment-water interface of abyssal sediments, sorptive properties of transition metals on sedimentary components, and the supply of these metals to the seafloor. Inst. of Phys. and Chem. Res., Hirosawa 2-1, Wako-shi, Saitama Pref., 351, Japan.

82:6016 Takematsu, Noburu, Motoaki Kishino and Tsutomu

Ogawa, 1981. Factors affecting the distribution of heavy metals in the sediments of Ise Bay [Japan]. I. Mer. Tokyo, 19(1):6-17. (In Japanese, English abstract.) Inst. of Phys. and Chem. Res., Hiro- sawa, Wako-shi, Saitama, 351 Japan.

82:6017 Thunell, R.C., 1982. Carbonate dissolution and

abyssal hydrography in the Atlantic Ocean. Mar. Geol., 47(3/4): 165-180.