856 C. Chemical Oceanography OLR (1984) 31 (12)

improves sensitivity. Vet. Diag. Lab., Iowa State Univ., Ames, Iowa, USA. (mjj)

84:5996 Stiller, M. and Y.C. Chung, 1984. Radium in the

Dead Sea: a possible tracer for the duration of meromixis. Limnol. Oceanogr., 29(3):574-586.

Three 226Ra profiles measured 1963-1978 indicate that the Ra activities in the upper water mass were higher than in the lower water mass, and indicate a similar Ra inventory. Mineral springs and sub- merged seepages are probably more important Ra contributors than Jordan inflow. It is estimated that the Dead Sea was meromictic for ~300 yr before the turnover in 1979, based on a model which requires several assumptions about past and present Ra fluxes. From tentative balances of dissolved salts it is shown that a previous overturn might have occurred at a lower lake level than in 1979. Isotope Dept., The Weizmann Inst. of Sci., 76 100 Rehovot, Israel.

84:5997 Sunda, W.G., 1984. Measurement of manganese, zinc

and cadmium complexation in seawater using chelex ion exchange equilibria. Mar. Chem., 14(4):365-378.

Radiotracers (54Mn, 65Zn, and J°9Cd) were used to quantify trace metal adsorption. Results were con- sistent with Chelex adsorption of both trace metal ions and trace metal-EDTA chelates. Equilibrium models fitted to the data were used to establish conditional stability constants for Chelex adsorption of Mn, Zn and Cd ions and EDTA chelates. These models also yielded ratios of free metal ions to total dissolved trace metal concentrations in seawater: l f f °~ for Mn, 10 ~.2 for Zn, and IO 1-5 for Cd. Independent measurements with a Cd ion-selective electrode also yielded a free:total Cd ratio of I(Y ~5. NMFS, NOAA, SEFC, Beaufort Lab., NC 28516, USA.

6.67 ___0.02 × IO 5 respectively. Samples from 4000 m depth had no anomalously high concentrations of fluoride. Bromide content (ave. 68.08 mg/L) and chtorinity varied similarly; a rather constant Br/C1 ratio of 0.00347 was established. Iodide concentra- tions varied irregularly with depth, being greater in the upper and bottom layers at all stations. Natl. Inst. of Oceanogr., Dona Paula, Goa 403 004, India.

84:5999 Lee, Won Jae, Kyu Dae Cho and Hyo Sang Choo,

1984. Chemical characteristics of water types in the Korea Strait. Bull. Korean Fish. Soc., 17(3): 219-229. (In Korean, English abstract.)

An analysis of transparency, water color, surface temperature, salinity, dissolved oxygen and nutrients revealed 4 distinct water types in the western channel of the Korea Strait: Nakdong River runoff, Tsushima Current waters, and Keoje and Ulsan coastal waters. Dept. of Oceanogr., Natl. Fish. Univ. of Pusan, Namgu, Pusan, 608 Korea. (msg)

84:6000 Naik, Sugandhini, R.J. Noronha, P.V. Shirodkar and

R. Sen Gupta, 1983. On the distribution of calcium, magnesium, sulphate and boron in the southwestern Indian Ocean region of the South- era Ocean. In: Scientific Report of First Indian Expedition to Antarctica. Technical Publication No. 1; Department of Ocean Development, New Delhi, India; pp. 87-94.

Calcium, magnesium, sulphate and boron concen- trations and their ratios to chlorinity were measured at standard depths. 'Distinct variations' in calcium, but not magnesium, were found at the subtropical convergence and the Antarctic divergence. Boron varied inversely with chlorinity in the subtropical region. Sulphate was the most conservative com- pound. Natl. Inst. of Oceanogr., Dona Paula, Goa 403 004, India. (msg)

C40. Area studies, surveys

84:5998 De Souza, F.P. and R. Sen Gupta, 1983. Fluoride,

bromide and iodide in the southwestern Indian Ocean sector of the Southern Ocean. In: Scien- tific Report of First Indian Expedition to Antarc- tica. Technical Publication No. 1; Department of Ocean Development, New Delhi, India; pp. 78-86.

In seawater, the average fluoride concentration and fluoride/chlorinity ratio were 1.31 _+ 0.003 mg/L and

84:6001 Sanzgiry, Sujata, Analia Mesquita and R. Sen

Gupta, 1983. Distribution of a few trace metals in a section in the southwestern Indian Ocean. In: Scientific Report of First Indian Expedition to Antarctica. Technical Publication No. 1; De- partment of Ocean Development, New Delhi, India; pp. 95-99.

Cu, Cd, Fe, Mn, Zn, Pb, Co and Ni determinations were carried out at different depths at one station in an Antarctic polynya and at 7 in the Southern Ocean. Depth and surface variations are discussed for the polynya, Antarctic Convergence and Diver-