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Scientific literature and information products produced by Woods Hole Coastal and Marine Science Center staff

Filter Total Items: 1737

Storm-driven sediment transport in Massachusetts Bay Storm-driven sediment transport in Massachusetts Bay

Massachusetts Bay is a semi-enclosed embayment in the western Gulf of Maine about 50 km wide and 100 km long. Bottom sediment resuspension is controlled predominately by storm-induced surface waves and transport by the tidal- and wind-driven circulation. Because the Bay is open to the northeast, winds from the northeast ('Northeasters') generate the largest surface waves and are thus the...
Authors
J.C. Warner, B. Butman, P.S. Dalyander

Temporal downscaling of decadal sediment load estimates to a daily interval for use in hindcast simulations Temporal downscaling of decadal sediment load estimates to a daily interval for use in hindcast simulations

In this study we used hydrologic proxies to develop a daily sediment load time-series, which agrees with decadal sediment load estimates, when integrated. Hindcast simulations of bathymetric change in estuaries require daily sediment loads from major tributary rivers, to capture the episodic delivery of sediment during multi-day freshwater flow pulses. Two independent decadal sediment...
Authors
N. K. Ganju, N. Knowles, D. H. Schoellhamer

Estimation of groundwater and nutrient fluxes to the Neuse River estuary, North Carolina Estimation of groundwater and nutrient fluxes to the Neuse River estuary, North Carolina

A study was conducted between April 2004 and September 2005 to estimate groundwater and nutrient discharge to the Neuse River estuary in North Carolina. The largest groundwater fluxes were observed to occur generally within 20 m of the shoreline. Groundwater flux estimates based on seepage meter measurements ranged from 2.86??108 to 4.33??108 m3 annually and are comparable to estimates...
Authors
T.B. Spruill, J.F. Bratton

Estimating pore-space gas hydrate saturations from well log acoustic data Estimating pore-space gas hydrate saturations from well log acoustic data

Relating pore-space gas hydrate saturation to sonic velocity data is important for remotely estimating gas hydrate concentration in sediment. In the present study, sonic velocities of gas hydrate–bearing sands are modeled using a three-phase Biot-type theory in which sand, gas hydrate, and pore fluid form three homogeneous, interwoven frameworks. This theory is developed using well log
Authors
Myung W. Lee, William F. Waite

Workshop summary: Physical properties of gas hydrate-bearing sediment Workshop summary: Physical properties of gas hydrate-bearing sediment

A wide range of particle and pore scale phenomena, often coupled, determines the macro-scale response of gas-hydrate bearing sediment to changes in mechanical, thermal, or chemical conditions. Predicting this macro-scale response is critical for applications such as optimizing the production of methane from gas-hydrate deposits, or determining the role of gas hydrates in global carbon...
Authors
William F. Waite, J.C. Santamarina

Investigating gas hydrate as a factor in accretionary margin frontal ridge slope failures and cold seep biogeochemistry Investigating gas hydrate as a factor in accretionary margin frontal ridge slope failures and cold seep biogeochemistry

During August 2008, a research expedition (2008-007-PGC) was carried out offshore Vancouver Island on the northern Cascadia Margin (Figure 1) to study the role of gas hydrate in slope stability and cold seep biogeochemistry. The cruise was organized by the Geological Survey of Canada (GSC) as part of the Earth Science Sector, Natural Gas Hydrate Program, Natural Resources Canada (NRCan)...
Authors
R. Enkin, L. Esteban, R. Haacke, T.S. Hamilton, M. Hogg, L. Lapham, G. Middleton, P. Neelands, John W. Pohlman, M Riedel, K. Rose, A. Schlesinger, G. Standen, A. Stephenson, S. Taylor, W. Waite, X. Wang

Climate change and global carbon cycle: Perspectives and opportunities Climate change and global carbon cycle: Perspectives and opportunities

The relevance of methane hydrates research to broader societal themes is often framed in terms of methane’s role in the global carbon cycle and its potential contribution to future climate change. To date, investigations of these fundamental issues have remained largely disconnected from applied studies focused on locating natural gas hydrate deposits, developing production technologies...
Authors
Carolyn D. Ruppel, John W. Pohlman

Eddy correlation measurements of submarine groundwater discharge Eddy correlation measurements of submarine groundwater discharge

This paper presents a new, non-invasive means of quantifying groundwater discharge into marine waters using an eddy correlation approach. The method takes advantage of the fact that, in virtually all aquatic environments, the dominant mode of vertical transport near the sediment–water interface is turbulent mixing. The technique thus relies on measuring simultaneously the fluctuating...
Authors
John Crusius, P. Berg, D.J. Koopmans, L. Erban

Modern perspectives on measuring and interpreting seafloor heat flux Modern perspectives on measuring and interpreting seafloor heat flux

There has been a resurgence of interest in marine heat flow in the past 10–15 years, coinciding with fundamental achievements in understanding the Earth's thermal state and quantifying the dynamics and impacts of material and energy fluxes within and between the lithosphere and hydrosphere. At the same time, technical capabilities have dwindled to the point that no U.S. academic...
Authors
Reid N. Harris, A. Fisher, C. Ruppel, F. Martinez

Collaboration tools and techniques for large model datasets Collaboration tools and techniques for large model datasets

In MREA and many other marine applications, it is common to have multiple models running with different grids, run by different institutions. Techniques and tools are described for low-bandwidth delivery of data from large multidimensional datasets, such as those from meteorological and oceanographic models, directly into generic analysis and visualization tools. Output is stored using...
Authors
R. P. Signell, S. Carniel, J. Chiggiato, I. Janekovic, J. Pullen, C. R. Sherwood

Shoaling of nonlinear internal waves in Massachusetts Bay Shoaling of nonlinear internal waves in Massachusetts Bay

The shoaling of the nonlinear internal tide in Massachusetts Bay is studied with a fully nonlinear and nonhydrostatic model. The results are compared with current and temperature observations obtained during the August 1998 Massachusetts Bay Internal Wave Experiment and observations from a shorter experiment which took place in September 2001. The model shows how the approaching...
Authors
A. Scotti, R.C. Beardsley, B. Butman, J. Pineda

Using the Model Coupling Toolkit to couple earth system models Using the Model Coupling Toolkit to couple earth system models

Continued advances in computational resources are providing the opportunity to operate more sophisticated numerical models. Additionally, there is an increasing demand for multidisciplinary studies that include interactions between different physical processes. Therefore there is a strong desire to develop coupled modeling systems that utilize existing models and allow efficient data...
Authors
J.C. Warner, N. Perlin, E.D. Skyllingstad
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