搜索结果: 1-15 共查到“海洋地球物理学 sediments”相关记录19条 . 查询时间(0.078 秒)
Genesis of structural features of humic acids from the sediments of a high productive coastal zone
humic acids Chakara (Mudbank) CP/MAS 13C NMR lignin moietiesar Basin
2017/4/11
Chemical and physical properties of humic acids (HAs) isolated from Mudbanks (locally known as “Chakara”—a
unique phenomenon occurring along the south west coast of India during the southwest monsoon...
Estimation of methanogenesis by quantification of coenzyme F430 in marine sediments
methane hydrate methanogens function-specific compound analysis marine sedimen
2017/4/10
Coenzyme F430 is the hydrocorphinoid nickel complex which acts as active site in methyl-coenzyme M reductase
(MCR). The MCR-F430 complex catalyzes the last step of methanogenesis: reduction of methyl...
Computed Tomography of Macrostructure and Physical Property Variability of Seafloor Sediments
Macrostructure Physical Property Variability
2015/8/14
Models designed to simulate physical or mechanical phenomena associated with the seafloor often require a knowledge of or at least an ability to estimate, the physical property structure of the upper ...
Melting history of the Patagonian Ice Sheet during Termination I inferred from marine sediments
Patagonian Ice Sheet Termination I melting history Al2O3 flux marine sediments
2017/4/11
To investigate the melting history of the Patagonian Ice Sheet (PIS) during the last deglaciation, we reconstructed
Al2O3 flux in sediments from the Magellanes fjord (53°S) and southern Patagonia (55...
Accumulation of prokaryotic remains during organic matter diagenesis in surface sediments off Peru
Accumulation of prokaryotic organic matter diagenesis
2014/4/18
Bacterial biomarkers (D-amino acids and muramic acid) were investigated in surface sediments (0–1 cm) at 22
stations in the Peru margin. Concentrations were used to quantitatively estimate the relati...
Phosphorus release with carbonate dissolution coupled to sulfide oxidation in Florida Bay seagrass sediments
Phosphorus release carbonate dissolution
2014/4/17
We hypothesized that CaCO3 dissolution, coupled to sulfide oxidation, is an important mechanism by which
solid-phase inorganic P (iP) becomes available to seagrass in tropical carbonate sediments. To...
Anaerobic ammonium oxidation in deep-sea sediments off the Washington margin
deep-sea sediments off Anaerobic ammonium
2014/4/17
The significance of anaerobic ammonium oxidation (anammox) for nitrogen removal in deep continental
margin sediments was studied with 15N amendments to suboxic sediments collected from 2800–3100-m wa...
Benthic solute exchange and carbon mineralization in two shallow subtidal sandy sediments: Effect of advective pore-water exchange
Benthic solute exchange carbon mineralization
2014/4/22
We conducted four field campaigns to evaluate benthic O2
consumption and the effect of advective pore-water
flow in nearshore permeable sediments in the North Sea and Baltic Sea. Advective pore-wate...
Red and black tides: Quantitative analysis of water-leaving radiance and perceived color for phytoplankton, colored dissolved organic matter, and suspended sediments
Red and black tides water-leaving radiance
2014/5/5
Using field measurements and quantitative modeling, we demonstrate that red coloration of the sea surface is
not associated with any particular group of phytoplankton and is strongly dependent on the...
Historic low-level phosphorus enrichment in the Great Lakes inferred from biogenic silica accumulation in sediments
Historic low-level phosphorus enrichment Great Lakes inferred
2014/4/30
Sedimentary biogenic silica (BSi) accumulation was used in conjunction with a hypothetical model of BSi
accumulation to show that BSi is a sensitive proxy for low-level phosphorus enrichment in the G...
Is phosphorus retention in autochthonous lake sediments controlled by oxygen or phosphorus?
autochthonous lake sediments phosphorus retention
2014/4/30
Eutrophication of various lakes on the Swiss Plateau was targeted in the 1980s by reducing external nutrient
loading and installing aeration/oxygenation systems. For five eutrophic lakes, three...
Bioirrigation in permeable sediments: Advective pore-water transport induced by burrow ventilation
permeable sediments Advective pore-water transport induced
2014/4/23
The physical mechanism that drives bioirrigation is strongly dependent on the permeability of the sediment. We
advance two mechanisms, each described by a corresponding microenvironment model. In mud...
Environmental control on anaerobic oxidation of methane in the gassy sediments of Eckernfo¨rde Bay (German Baltic)
anaerobic oxidation gassy sediments
2014/5/13
We investigated the effect of seasonal environmental changes on the rate and distribution of anaerobic oxidation
of methane (AOM) in Eckernfo¨rde Bay sediments (German Baltic Sea) and identifie...
Carbon and hydrogen isotopic compositions of sterols from riverine and marine sediments
Carbon hydrogen isotopic compositions
2014/5/13
The sources (marine algae, terrestrial C3 and C4 plants) of sterols deposited to sediments along a riverine–marine
transect from Ohtsuchi River in Iwate Prefecture, Japan, to the northwestern Paci...