Showing papers in "Marine Chemistry in 1988"

TL;DR: In this article, a method was described for the rapid, precise determination of nonvolatile dissolved organic carbon in seawater in concentrations between 0 and 2000 μM using a platinum catalyst at 680 °C under an oxygen atmosphere after the sample has been freed of inorganic carbon.

TL;DR: A review of the occurrence of perylene in the marine sedimentary environment is presented in this article, where surface sediment and sediment cores predating modern anthropogenic pollution from different marine and lacustrine locations and also peat samples from various regions of the world have been analyzed for perylene.

TL;DR: In this paper, the influence of temperature and pH on metal speciation in seawater has been investigated and it has been shown that the extent of strongly hydrolyzed metal complexation is strongly temperature-and pH-dependent.

TL;DR: Dimethyl sulfide (DMS) produced by biological activity in seawater is the principal gaseous form of sulfur released to the atmosphere by the ocean and plays an important part in the biogeochemical sulfur cycle as discussed by the authors.

TL;DR: In this paper, marine lipid compounds can be subdivided into as many as 16 individual classes according to their chemical structure, which are present in the dissolved and particulate fractions of seawater at the μgl−1 level.

TL;DR: For the ranges of values of total alkalinity and total CO2 encountered in natural seawater, it is possible, using an empirical equation, to determine a precise estimate (error < 0.04 Δ%) of PCO2 at temperature t (0 ≤t≤30°C) when only pCO2 at a different temperature ti and salinity S are known as discussed by the authors.

TL;DR: In this article, a direct link between natural seepage in a deep water marine setting and sea slick and tar ball formation was established based on molecular (GC/FID, GC/FPD and GC/MS) and carbon isotopic evidence.

TL;DR: In this paper, an extensive pore water data set has been gathered in the Great Marsh, Delaware over various seasons, salinities, and tides, and the data all point to a complimentary redox cycle for sulfur and iron which operates seasonally and tidally.

TL;DR: In this article, the speciation of inorganic sulfides in surface seawater has been calculated using available stability constants for metal sulfides and constants estimated from the dithizone extraction constants, together with mean trace concentrations of sulfide and some metal ions that form strong sulfide complexes.

TL;DR: The extent of incorporation of Mn2- into calcite is inversely related to the rate of precipitation in laboratory experiments at Earth's surface, aqueous conditions as mentioned in this paper, which is statistically significant: at the 99.9% confidence level.

TL;DR: In this article, the trace metals cadmium, copper, nickel, lead, zinc, cobalt, iron and manganese from the oxic and anoxic water columns of the Black Sea and Framvaren Fjord are reported.

TL;DR: In this paper, the provenance, concentrations, and nature of sedimentary organic matter (SOM), particularly the nitrogenous fraction, were examined for sites throughout the Gulf of Maine and two of its estuaries.

TL;DR: In this paper, a seasonality in the iodate/total iodide ratio in ocean waters was found to be the result of water masses becoming isolated by hydrographic effects for a sufficient time for iodate reduction to significantly change the ratio.

TL;DR: In this article, total dissolvable cobalt, copper, manganese, and nickel were measured in two water column profiles from the Sargasso Sea and the results suggest cycling in association with nutrients, with relatively low concentrations in surface waters and an increase in concentration with depth.

TL;DR: A vertical profile of soluble (< 0.4 μm) Fe(II) from Framvaren Fjord, Norway, was determined using an improved Ferrozine colorimetric method.

TL;DR: In this paper, an automated system for measuring alkalinity and total carbon dioxide in seawater by potentiometric titration is described, and single observation standard errors of ∼1 μequiv. kg−1 and ∼2 μmol kg− 1 for alkalininity and CO2 are obtained using this system.

TL;DR: In this article, a procedure is presented to separate diatoms and radiolaria from marine sediments and from each other, to purify them of elements associated with other phases, and to dissolve them to determine their elemental composition.

TL;DR: In this paper, the authors analyzed 50 sediment cores collected from four stations of the southern Baltic in July 1980 and analyzed for the elements Ca, Mg, Na, K, Al, Ti, Fe, Mn, Zn, Cd, Cu, Co, Ni, Pb, U, Th, Corg, N and P.

TL;DR: In this article, the distributions of soluble and particulate trace metals in the Bang Pakong Estuary, Thailand were studied during high (wet) and low (dry) discharge conditions.

TL;DR: In this article, a sequential leaching technique has been used to characterize the solid state speciation of total copper (∑Cu) among a number of operationally defined host fractions in surface seawater particulates from the Atlantic Ocean, a diagenetically active hemipelagic sediment core from the eastern Mediterranean, a turbidite -rich sediment core of the Madeira Abyssal Plain and a series of 79 Atlantic Ocean surface or near surface sediments.

TL;DR: The vertical distribution of fluorescent organic matter was investigated at three stations in the North Pacific as discussed by the authors, and it was suggested that fluorescent organic matters are degraded in the euphotic zone and regenerated in the water column by degradation of organic matter on the settling particles as in the case of the nutrients.

TL;DR: New carbonate data obtained on February-March and June-July cruises in the northeast Pacific during 1985 were utilized to describe processes affecting seasonal variations of calcite and aragonite saturation as mentioned in this paper.

TL;DR: In this article, the chemistry of iron in the water and the sediments has been investigated in Framvaren, a super-anoxic fjord in South Norway, and several particulate iron phases have been observed in the anoxic water, including silicate-bound iron from the source rock of the area, finely dispersed amorphous iron sulfide (which bleeds through 0.4 μm Nuclepore filters) and framboidal iron sulfides in the size range 3-10 μm.

TL;DR: Framvaren, a permanently anoxic fjord on the southernmost point of Norway, is geomorphologically the result of glaciation and deglaciation as discussed by the authors.

TL;DR: In this article, the authors report on the speciation of iodine in Chesapeake Bay during July 1986, using differential pulse polarography (DPP) to determine the amount of iodate in the water column.

TL;DR: In this paper, the cycling of sedimentary sulfur was examined over a one year period in the Great Marsh, Delaware (U.S.A.) using newly developed analytical procedures.

TL;DR: In this paper, the solubility isotherms of vanadium and solution species are simulated to illustrate the solid phase formation and solution chemistry of V in the marine environment, and it was concluded that Ca vanadates (Ca(VO3)2) control the Solubility of V and other V minerals in seawater.

TL;DR: In this article, depth profiles of various mercury fractions in the permanently anoxic Framvaren Fjord, southern Norway, were determined on two occasions: September 1983 and February 1985.

TL;DR: In this article, a study of the organic matter in the sea surface microlayer of the northern Adriatic Sea was performed along the transect from the Istrian peninsula to the Po River Estuary.

TL;DR: In this paper, anodic stripping voltammetry (ASV) and reverse-phase liquid chromatography (C 18 -RPLC) were compared for the marine waters associated with Gulf Stream warm-core rings (WCR).