Showing papers in "Marine Chemistry in 2014"

TL;DR: This article examined the adsorption of trace metals (Cd, Co, Cr, Ni and Pb) to both virgin and beached (aged) pellets under estuarine conditions in order to better understand the role of plastic materials on the transport and behaviour of metals from river to ocean.

TL;DR: In this paper, the mean monthly distributions of pH and carbon chemistry parameters for the reference year 2005 are computed using the climatological mean monthly pCO2 data adjusted to a reference year, and the alkalinity estimated from the potential alkalininity-salinity relationships.

TL;DR: In this article, an improved fast and sequential protocol that permits the determination of low concentrations of nitrite and nitrate in marine and freshwater samples using small volumes is presented. But the method has a detection limit <0.05 µM, a high precision (ranging from 0.2 to 11%) and accuracy (0.07 µM) for the determination OF NO 3 + NO 2 concentrations lower than 30 µM.

TL;DR: In this article, a method to analyse nitrate in marine pore water, seawater and freshwater is presented, which replaces the well-known cadmium column method for the reduction of nitrate to nitrite.

TL;DR: In this article, the authors compared the performance of three methods, namely XAD-8/4, PPL and RO/ED, in the isolation of dissolved organic carbon (DOC) from deep and surface ocean water.

TL;DR: In this paper, a survey in the Palma Beach revealed N, Fe and chlorophyll a enhancement associated to areas of preferential groundwater discharge from the nearby coastal aquifer, indicating the relevance of SGD-driven nutrient and trace metal inputs in the regulation of nearshore phytoplankton communities of oligotrophic areas.

TL;DR: In this article, the authors used salicylaldoxime (SA) in seawater to determine the chemical speciation of iron using cathodic stripping voltammetry (CSV).

TL;DR: A detailed radon mass balance model and an uncertainty analysis revealed porewater exchange rates of 27 −±7 and 14 −±6 cm−d−1 in Waikareao and Te Puna, respectively as mentioned in this paper.

TL;DR: In this paper, an off-line pre-concentration and extraction method for rare earth elements (REEs) in seawater prior to quantification using magnetic sector, high resolution, inductively coupled plasma mass spectrometry (HR ICP-MS) was developed.

TL;DR: In this article, the long-term pattern of hypoxia and its relationship to organic carbon and nutrient loading in the Pearl River Estuary under significant human impacts was investigated. But the results were limited to the upper reaches of the Pearl river Estuary.

TL;DR: In this article, a three end-member mixing model based on lignin phenol yields and stable carbon isotopic compositions was used to distinguish sources of organic matter (OM) in riverine particles and surface sediments from the northern South China Sea.

TL;DR: In this article, the daily concentrations, fluxes and dynamics of seven EU priority contaminants (potentially toxic metals Cd, Cu, Cr, Ni, Pb, Zn and the metalloid As) transported by the Garonne River (La Reole site; watershed area ~Â57,000 km2) to those released into the freshwater reaches of the Gironde Estuary (Garonne Branch) of Bordeaux under low river discharge and contrasting rainfall situations were investigated.

TL;DR: In this paper, the changes in pH, salinity, temperature and phosphate (PO4) concentration affect the precipitation of ikaite in sea ice, and it is shown that the change in pH and salinity is the controlling factor for Ikaite precipitation.

TL;DR: In this paper, the authors analyzed the lipid compositions of suspended particulate matter in the water columns of two anoxic marine settings, the Black Sea and Cariaco Basin, to better define the sources of glycol dialkyl glycerol tetraether (GDGTs) in marine environments.

TL;DR: In this paper, a PARAFAC model with five components was fit to BEPOM excitation-emission matrix (EEM) fluorescence data, with two components attributed to planktonic sources and two component attributed to terrestrial (humic) sources.

TL;DR: In this paper, the authors compared the slopes of the mixed layer and the depths of individual water masses in the study region, with slopes ranging from 0.23 to 0.40 µm.

TL;DR: In this paper, the authors used a box model approach to assess the nitrogen budget in the Sundarban mangrove ecosystem, which acts as a sink for atmospheric nitrogen in terms of NOx, NH3, N2, and water column dissolved inorganic nitrogen.

TL;DR: In this article, the authors used detailed p CO 2 and radon ( 222 Rn, a submarine groundwater discharge tracer) surveys to investigate whether water-to-air CO 2 fluxes were enhanced in residential canal systems, and whether groundwater exchange may drive CO 2 distribution.

TL;DR: A high-recovery technique of dissolved organic matter (DOM) isolation was used to isolate DOM from the North Atlantic Senegal-Mauritanian upwelling area surface water (5 meters), North Atlantic oxygen minimum water (415 meters) and deep water (3000 meters).

TL;DR: In this article, the initial results of the SGD-derived nutrient fluxes into Sanggou Bay, Shandong, China, in June 2012 are reported, and the average SGD fluxes are evaluated to be between 2.59×-107 and 3.07-m3−d−1.

TL;DR: A detailed geochemical groundwater survey was conducted within a carbonate sand subterranean estuary (STE) system on the tropical island of Rarotonga, Cook Islands, to identify N sources and transformation along the groundwater flow paths.

TL;DR: In this article, high-resolution, two-dimensional distributions of porewater analytes were determined in the upper three layers of a modern microbial mat from Nilemah, Shark Bay, Western Australia, using colorimetric diffusive equilibration in thin film (DET) and diffusive gradients in thin-film (DGT) techniques.

TL;DR: In this paper, the authors performed a comprehensive study on the molecular composition of dissolved organic matter (DOM) and the composition of the associated microbial communities in four selected fjords of Svalbard.

TL;DR: The long-range transport of Asian dust (AD) can carry large quantities of trace elements to the marginal seas of the Northwest Pacific, and the deposition of soluble fractions of aerosol elements may significantly impact the primary productivity and ecosystem structure as discussed by the authors.

TL;DR: Tritium dating of groundwater and a radon mass balance was used to assess the contribution of submarine groundwater discharge (SGD) to a nutrient budget in a tropical reef lagoon (Rarotonga, Cook Islands).

TL;DR: In this article, the size distributions of humic-like and protein-like fluorescent and UV absorbing marine dissolved organic matter (DOM) have been determined using flow field-flow fractionation (FlFFF) coupled to UV-absorbance and fluorescence detectors.

TL;DR: In this article, a 1D steady-state modeling (PROFILE) was used to estimate depth reaction intervals and reaction rates by fitting the measured element profiles, and the simulated dissolved As profiles consistently fitted the measured one.

TL;DR: This article investigated the size fractionation in East Antarctic fast ice of Fe, manganese (Mn) and aluminium (Al) in the soluble (10μm) particulate fractions during a time-series carried out in late spring/early summer 2009.

TL;DR: In this article, it is suggested that these transformations are related to in-direct photobleaching possibly involving reactive oxygen species (e.g. hydroxyl radicals), because very little change in the fluorescent component of the DOM (FDOM) was observed during the photo-degradation experi- ments.

TL;DR: Wang et al. as discussed by the authors proposed a method to solve the problem of artificial neural networks with the help of the National Natural Science Foundation of China (NNSC) and the National Museum of China.