Showing papers in "Marine Chemistry in 2017"

TL;DR: In this paper, a model approach based on the central limit theorem was used to show that the observed fragment ion intensities of marine dissolved organic matter (DOM) may be explained by intrinsic averaging.

TL;DR: The GP16 cruise of the GEOTRACES GP16 Eastern Pacific Zonal transect (EPZT) as discussed by the authors sampled the oxygen deficient waters of the productive eastern upwelling Peru margin westward to Tahiti through the East Pacific Rise (EPR) hydrothermal plume around 12°S in October-December 2013.

TL;DR: In this paper, spatial variations in subsurface pore water residence times, salinity, organic matter (OM) availability, and redox conditions and their effects on nutrient cycles as well as on microbial community patterns and microphytobenthos growth are assessed.

TL;DR: The distribution of Zn and Cd and their stable isotope ratios (δ66Zn and δ114Cd) were measured on samples from the Eastern Subtropical South Pacific Zonal Transect (EPZT), US GEOTRACES section GP16 as mentioned in this paper.

TL;DR: In this article, the first spatially extensive, multi-year measurements of dissolved and particulate trace metals in surface waters were collected throughout the 700 × 200 km grid of the Palmer Long-Term Ecological Research program in three consecutive austral summers (2010 − 2012).

TL;DR: In this article, the authors measured long-lived radium isotopes (226 Ra, 228 Ra) along a zonal transect at 12°S (US GEOTRACES GP16) in the eastern tropical South Pacific Ocean.

TL;DR: In this article, a detailed surface transect consisting of two sections crossing the surface flow from the Siberian continental shelf to the Fram Strait, the TransPolar Drift (TPD), clearly indicates the flow path of the riverine contribution to Fe and Fe-binding organic ligands with concentrations of 0.7 to 4.4 nM and 1.6 to 4 1.1 nM, respectively.

TL;DR: In this paper, the size distribution of trace elements in small (suspended) vs. large (sinking) particles and its controlling factors were analyzed during the GEOTRACES GP16 cruise.

TL;DR: In this article, the authors present new observations of dissolved Fe concentrations and stable isotope ratios (δ56Fe) from the US GEOTRACES Eastern Pacific Zonal Transect GP16.

TL;DR: The 2013 GEOTRACES Eastern Pacific Zonal transect (GP16) extended from the Peruvian coast to Tahiti, along a line that fell between 10 and 15°S.

TL;DR: In this article, the authors used pump profiling for better spatial resolution (10 cm) of redox active species and a modified, low-level spectrophotometric method for soluble Mn speciation (detection limit = 3 nM).

TL;DR: In this paper, the distribution and δ 13 C composition of n -alkanes were used to identify organic matter (OM) sources in river dominated Ashtamudi Estuary, Southern India.

TL;DR: In this paper, five species of bivalves (Japanese littleneck, blue mussel, trough shell, Stimpson's quahog, and Japanese dosinia) were collected from three different sites in Tokyo Bay and their shells and soft tissues were analyzed for rare earth element (REE) concentrations.

TL;DR: In this paper, the authors investigated the relationship between Zn availability and primary production using the dissolved Zn isotopic composition of samples collected across high and low productivity waters in the Tasman Sea, SW Pacific Ocean.

TL;DR: In this paper, a simple, user-determined correction was proposed to significantly improve the accuracy of pH measurements made with unpurified mCP, which achieved an accuracy of 0.005 at low pH (~7.25) and 0.01 or more at higher pH (~8.25).

TL;DR: In this article, pore water measurements of 222Rn and Ra isotopes were used to evaluate the time-scale of tidal seawater circulation in a coastal bluff and a barrier beach subterranean estuary (STE) on Long Island, NY.

TL;DR: In this article, the redox sensitive metals Mn, Fe, U, Re, Mo, and V were studied in relation to salinity, organic matter-, and sulfur cycling within the subterranean estuary of a barrier island sand beach on Spiekeroog Island, Northern Germany.

TL;DR: In this article, a new large volume DOM isolation approach that selectively isolates HMW and LMW DOM fractions with distinct 14C ages, a proxy for reactivity, is described.

TL;DR: In this paper, the distribution of trimethylamine (TMA), dimethylsulfide (DMS), and dimethyl sulfoniopropionate (DMSP) in Aarhus Bay, Denmark and provided the first report for their stable carbon isotopic composition.

TL;DR: In this paper, the authors measured Ra isotopes in both high and low temperature vent fluids, and in neutrally buoyant plumes, and derived the time scales of plume transport.

TL;DR: In this article, detailed depth profiles across the pelagic redox zone at the Landsort Deep, Baltic Sea, were collected for molybdenum (Mo), vanadium (V), and tungsten (W), for both dissolved ( ǫ 0.22μm) and particle-bound element fraction.

TL;DR: In this paper, biogeochemical cycling of dissolved copper (dCu) along the Line P transect, spanning from the coastal waters of British Columbia, Canada, to the High Nutrient, Low Chlorophyll (HNLC) open Ocean Station Papa (OSP or P26), was investigated.

TL;DR: In this article, the authors measured isoprene emission and photosynthesis to changing light levels in high-density cultures of two diatom species, Phaeodactylum tricornutum and Chaetoceros calcitrans.

TL;DR: In this paper, the authors show that evidence from both hydrographic data and dissolved inorganic iodine species (DIIS) suggest that the Kuroshio has an important influence on the circulation systems and ecological environment of the East China Sea (ECS).

TL;DR: In this article, the abundance of transparent exopolymer particles (TEP) is examined across a surface water gradient of organic carbon from a phytoplankton bloom region in the western North Atlantic to oligotrophic waters in the Sargasso Sea, including a coastal region sampled near Cape Cod.

TL;DR: In this article, the dissolution rate of calcite, formed into synthetic sediment disks by mixing various amounts of this mineral with montmorillonite, was measured in a stirred-flow reactor and exposed to a range of saturation states and shear stress conditions to simulate conditions at the sediment-water interface.

TL;DR: In this article, the authors explored how redox changes with depth and distance from the Mississippi River affect arsenic and vanadium cycling in shallow pore waters from a marsh in an interdistributary embayment of the lower Mississippi River Delta.

TL;DR: The loss of CH3Hg was greatest in the open ocean due to increased penetration of all wavelengths, especially the UV portion of the spectrum which has a greater ability to degrade CH3hg.

TL;DR: This study investigated the influence of specific sulfur-containing organic compounds and naturally occurring DOM on the accumulation of MeHg in a marine diatom Thalassiosira pseudonana and found thiol-containing compounds reduced MeHG accumulation in algal cells at high added concentrations.

TL;DR: The results provide the first quantitative evidence of the major ecological relevance of copepod grazing to iron cycling and their fecal products in the cycling of iron in silicate depleted areas of the Southern Ocean.