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Excitation – emission matrix (EEM) fluorescence spectroscopy was employed to study the chemical nature of organic matter readily released into solution from sediment particles during episodes of resuspension. Surface sediment samples collected from five locations within the Hudson River Estuary and the Inner New York Bight were resuspended in their(More)
[1] Small mountainous rivers (SMR) export globally significant quantities of particulate organic carbon (POC) to the oceans, the composition of which may be distinct from POC delivered by major world rivers. To better constrain the controls on the D 14 C signatures of POC suspended in SMR, we examined the temporal variability of D 14 C and d 13 C of POC(More)
Ž. Laboratory experiments were conducted to evaluate the net exchange of organic carbon OC between sediments and overlying water during episodes of resuspension. Surface sediment samples collected from six locations within the Hudson River Estuary and the Inner New York Bight were resuspended in their respective bottom waters for periods ranging from 30 Ž.(More)
—Mixed-redox (suboxic, or oscillating between oxidizing and reducing conditions) to anoxic marine sediments from the Raritan –New York Bay complex and the Inner New York Bight of the eastern U.S. were studied to investigate the factors controlling the accumulation of pore-water dissolved organic carbon (DOC). DOC increased with depth at each of four study(More)
Cycling of dissolved organic carbon (DOC) was investigated in anoxic sediments of the Santa Monica Basin, California Borderland, by analyzing the concentration and isotopic signatures (D 14 C and d 13 C) of pore-water DOC and dissolved inorganic carbon (DIC), and organic compound classes extracted from the bulk sediments. DOC and DIC increased across the(More)
The paper proposes a method for the imaging and rendering of art paintings using a multi-band camera system. The surface shape of an art painting is considered as a rough plane rather than a three-dimensional curved surface. First. we present an algorithm for estimating the surface normal at each pixel point, based on a photometric stereo without using a(More)
Separation of organic carbon (OC) from total carbon (TC; the sum of OC and inorganic carbon, IC) is a common procedure in oceanographic and limnological research. In addition to the determination of the weight-% of OC and IC in the sample (%OC and %IC), OC is frequently isolated for the determination of its natural carbon-isotopic signatures (δ 13 C OC and(More)
[1] Chemical and isotopic variability of particulate organic carbon (POC) was examined in samples from the Santa Clara River watershed and adjacent shelf to investigate the processing of fossil POC derived from bedrock. The Santa Clara is a small coastal river that drains mountainous terrain in southern California, United States. Organic carbon in shale,(More)
Marine DOC and determination of its isotopic signatures Dissolved organic carbon (DOC) is the largest pool of reduced carbon in the oceans, being comparable in size to the amount of CO 2 in the atmosphere (Hedges 1992). Marine DOC is also a highly complex pool both in composition and dynamics (Benner 2002). Marine primary production is considered to be the(More)
Organic-rich nearshore sediment was incubated in sealed vessels under sulfate-reducing conditions to investigate the mechanism of dissolved organic carbon (DOC) production in marine sediments. Concentrations and isotopic signatures (d 13 C and D 14 C) of particulate organic carbon (POC), DOC, dissolved inorganic carbon (DIC), and particulate inorganic(More)