Global ETD Search
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Showing 1 to 15 of 15 for “"Hydrographic measurements"”.
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Dynamics and kinematics of an estuarine network
… the dynamics of estuarine networks, based on hydrographic observations in Newark Bay, a sub-estuarine network connected to the Hudson River estuary through New York Harbor. Estuarine networks differ from simple estuaries in that they may have multiple connections to the ocean, multiple …
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Time-Lapse Volumetric Seismic Imaging of a Major Oceanic Front and Submesoscale Coherent Vortices at South Atlantic Ocean
… the receiver cables. Compared with standard hydrographic measurements, seismic reflection imagery provides much improved spatial resolution and extensive coverage over a whole range of length scales, enabling detailed spatial and temporal quantification of thermohaline structures and ocean …
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Agulhas retroflection rings in the South Atlantic Ocean
… South Indian into the South Atlantic Ocean. Few hydrographic measurements have been collected from Agulhas rings in the South Atlantic Ocean and their characteristics and influence on the waters of the Cape Basin through which they pass are thus little known. The temperature, salinity, and …
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Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Bight
… using a combination of radiochemical tracer and hydrographic measurements. The motivation was to provide evidence of transport routes for shelfwater that could be important to the balance of shelf-slope exchange, as well as to the biogeochemical fluxes across this crucial ocean boundary. The four …
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Radium isotopes as tracers of coastal circulation pathways in the Mid-Atlantic Blight
… using a combination of radiochemical tracer and hydrographic measurements. The motivation was to provide evidence of transport routes for shelfwater that could be important to the balance of shelf-slope exchange, as well as to the biogeochemical fluxes across this crucial ocean boundary. The four …
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Radium isotopes and radon-222 as tracers of sediment-water interaction in Arctic coastal and lacustrine environments
… fluxes were then paired with methane (CH4) measurements to determine delivery rates of methane into the lake via groundwater. Groundwater CH4 fluxes significantly exceeded diffusive air-water fluxes from the lake to the atmosphere, suggesting that groundwater is an important source of CH4 to …
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Dynamics and kinematics of an estuarine network
… the dynamics of estuarine networks, based on hydrographic observations in Newark Bay, a sub-estuarine network connected to the Hudson River estuary through New York Harbor. Estuarine networks differ from simple estuaries in that they may have multiple connections to the ocean, multiple …
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Thermohaline variability of AAIW in the Atlantic sector of the Southern Ocean investigated using an Altimetry Gravest Empirical Mode
… are poorly understood due to a lack of hydrographic observations and model limitations. An improved Gravest Empirical Mode (GEM) is set up for the Southern Ocean south of Africa using the updated store of hydrographic measurements obtained from CTD transects for the area, combined with …
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The Distribution and Reactivity of Organochlorines in Estuaries
… organic carbon content, specific surface area). Hydrographic measurements were also made to assist in defining the estuarine environment. Concentrations of PCDD/DF on a dry weight basis ranged from non-detectable (n.d.) to 11100 pg g"^ and PCB from n.d. to 3000 ng g Estuarine OC contamination was …
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Hydrographic Variability on Decadal and Interdecadal Scales in the Northern Gulf of Alaska
… into the euphotic zone. A time series of hydrographic measurements, tem perature and salinity versus depth, at a coastal site in the northern Gulf of Alaska is used to determine the seasonal and interannual variations in the MLD. Data from this station called GAK 1 (59°50.7‘X. 149C28.0'\V) …
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On subannual variability in the abyssal ocean
… ocean and its broader implications. First, hydrographic measurements from the Clarion-Clipperton Zone of the tropical eastern North Pacific are used to characterize the structure and variability of the bottom mixed layer (BML) in a region targeted for deep-sea mining. The observations reveal …
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On Subannual Variability in the Abyssal Ocean
… ocean and its broader implications. First, hydrographic measurements from the Clarion-Clipperton Zone of the tropical Northeastern Pacific are used to characterize the structure and variability of the bottom mixed layer (BML) in a region targeted for deep-sea mining. The observations reveal …
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Sill Overflow Processes in the Philippine Archipelago
… and a hydraulic control model based on hydrographic measurements estimate a transport of approximately 0.32 x 10^6 m^3/s. Analysis of Froude number variation across the sill shows the flow is hydraulically controlled. Turbulent dissipation and bulk diapycnal diffusivity measurements at …
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Time-Lapse Acoustic Imaging of the Oceanic Energy Cascade
… reflections at depth. Calibration using nearby hydrographic measurements shows that this band corresponds to a pycnocline which separates warm near-surface waters from cold deep waters. The depth of the pycnocline varies by $\sim 350$~m over $\sim 10$~days. Acoustic reflections within the …
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Nitrogen cycling in the subtropical southeast Atlantic and southwest Indian Oceans as recorded by the nitrogen isotopes of modern planktic foraminifera
… and interpreted in the context of coincident hydrographic measurements to deter- mine the controls on the δ15N of foraminifera and their potential food sources. The data presented here reveal that mixed layer nitrate δ15N was noticeably lower within an Agulhas eddy than it was for the …