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

Surface sediment samples from the Angola, Cape Verde and Brazil basins and Vema Channel were examined to evaluate the relationship among car- bonate dissolution, abyssal hydrography and water column carbonate chemistry. At each location lysocline position was determined, carbonate satu- ration was calculated, and major deep-water mass boundaries were identified. In the Vema Channel and the Brazil Basin (western Atlantic), there is a first order correlation among lysocline position, benthic thermocline ( A A B W / N A D W boundary), and the transition from saturation to undersatura- tion with respect to carbonate. In the eastern Atlantic, there is no noticeable benthic thermocline and the lysocline occurs significantly deeper than the saturation/undersaturation transition. Dept. of Geol., Univ. of South Carolina, Columbia, S.C. 29208, USA.

82:6018 Ullman, W.J. and R.C. Aller, 1982. Diffusion

coefficients in nearshore marine sediments. Limnol. Oceanogr., 27(3):552-556.

The formation resistivity factor F, necessary to calculate bulk sediment diffusion coefficients of interstitial solutes from free solution diffusion coefficients, can be estimated from ~, the sediment porosity. Empirical relationships between F and indicate that F ~ ~ 2 for unlithified marine sands or muds when ~ ~< 0.7 and that F ~ ~2.5 to ff 3 for high porosity muds when ~ ~ 0.7. Dept. of Geophys. Sci., Univ. of Chicago, 5734 S. Ellis Ave., Chicago, Ill. 60637, USA.

82:6019 Yeats, P.A. and J.M. Bewers, 1982. Discharge of

metals from the St. Lawrence River. Can. J. Earth ScL, 19(5):982-992.

A 2-year study found dissolved-metal concentrations 'unrelated to changes in water flow or suspended load [but] particulate A1, Fe, Mn and Zn concen- trations related to water flow.' The St. Lawrence's annual dissolved, non-detrital, and total particulate metal discharges were used 'to estimate global annual river discharges of metals to the ocean.' Non-detrital particulate fluxes were emphasized. Bedford Inst. of Oceanogr., Dartmouth, N.S. B2Y 4A2, Canada. (isz)

C210. Pollution (see also E300-Effec ts of pol lu t ion, and F 2 5 0 - W a s t e disposal)

82:6020 Balkas, T.I., 1. Salihoglu, A.F. Gaines, M. Sunay and

J. Matthews, 1982. Characterization of floating

and sinking tar balls in the marine environment. Mar. Pollut. Bull, 13(6):202-205.

Tar balls, according to their densities, the prevailing temperature and their degree of weathering float, sink or are washed ashore. Samples were analyzed by IR, H-nmr, GC and GC/MS; densities and hexane, benzene and methanol solubilities were measured. Weathering was investigated in terms of the losses of n-paraffinic/aromatic hydrocarbons. Middle East Tech. Univ., Mar. Sci. Dept., P.K. 28, Erdemli, Icel, Turkey.

82:6021 Barbaro, Alvise, Antonia Francescon and Bruno

Polo, 1981. Fluoride distribution along chlorinity gradients in Baltic Sea waters. Finn. mar. Res., 248:129-136.

Fluoride concentration was determined in coastal and inland waters of Finland and Sweden, focusing on the relationship between fluoride concentration and chlorinity; a positive linear regression between the two parameters was established. The F/C1 ratio (xl05) changed from 3000 in the lakes to 7.70 in the brackish water areas with the highest chlorinity. The fluoride levels and the F/C1 ratios were similar or slightly lower than those reported in the literature; F/CI ratios recorded in the Pojoviken were among the highest ever found in brackish water. Inst. di Biol. de Mare, Consiglio Naz. delle Ricerche, Riva 7 Martiri, 1364 A, 30122 Venezia, Italy.

82:6022 Fogelqvist, Elisabet, SOren Lagerkvist and Peter

Lindroth, 1982. Petroleum hydrocarbons in the Arctic Ocean surface water. Mar. Pollut. Bull., 13(6):211-213.

Concentration of petroleum hydrocarbons under the ice north of Svalbard ranges, with Kuwait crude oil as a reference, 0.1--0.6 /tg/L crude oil equivalents with respect to LMW components and 0.054).2/~g/L HMW components. Dept. of Analyt. and Mar. Chem., Univ. of Goteborg, S-412 96 Goteborg, Sweden.

82:6023 Hashimoto, Akio, Hajime Sakino, Tsutomu Kojima,

Etsuko Yamagami, Saiko Tateishi and Takashi Akiyama, 1982. Sources and behavioar of dinitro- toluene isomers in seawater. War. Res., 16(6): 891-897.

Isomers of dinitrotoluene (DNT) were identified in an industrial effluent discharged into Dokai Bay, Japan. From sampling along a transect, it was found that some isomers are more stable than others and that a decrease in DNT concentration cannot be