Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (171)
- Oceanography and Atmospheric Sciences and Meteorology (9)
- Climate (7)
- Life Sciences (7)
- Ecology and Evolutionary Biology (6)
-
- Environmental Monitoring (6)
- Oceanography (6)
- Terrestrial and Aquatic Ecology (6)
- Animal Sciences (5)
- Aquaculture and Fisheries (5)
- Natural Resources Management and Policy (5)
- Atmospheric Sciences (4)
- Earth Sciences (4)
- Environmental Indicators and Impact Assessment (4)
- Meteorology (4)
- Other Oceanography and Atmospheric Sciences and Meteorology (4)
- Biogeochemistry (2)
- Other Environmental Sciences (2)
- Pharmacology, Toxicology and Environmental Health (2)
- Toxicology (2)
- Water Resource Management (2)
- Environmental Health and Protection (1)
- Fresh Water Studies (1)
- Glaciology (1)
- Hydrology (1)
- Marine Biology (1)
- Natural Resources and Conservation (1)
- Other Earth Sciences (1)
- Keyword
-
- CHSD Presentations (156)
- Alumni (9)
- Institute History (9)
- Poster (9)
- Posters (9)
-
- VIMS 75th Anniversary (9)
- Physical Sciences Presentations (7)
- VIMS Presentations (5)
- Virginia (4)
- Coastal flooding (3)
- GIS (3)
- Hampton Roads (3)
- Oysters (3)
- Antarctica (2)
- Flocculation (2)
- Hurricanes (2)
- King Tide (2)
- Modeling (2)
- Sea Level Rise (2)
- StormSense (2)
- Algal Blooms (1)
- Amundsen Sea (1)
- Aquaculture (1)
- Aquatic Health Sciences (1)
- Aquatic Health Sciences Presentations (1)
- Bed erodibility (1)
- Bivalves (1)
- Blue Crab (1)
- Chesapeake Bay (1)
- Citizen Science (1)
- File Type
Articles 1 - 30 of 173
Full-Text Articles in Physical Sciences and Mathematics
On The Relative Importance Of Offshelf/Onshelf Drivers Of Variability In Mcdw Inventory On The Amundsen Shelf, Antarctica, Pierre St-Laurent, S. E. Stammerjohn, T. Maksym, R. M. Sherrell
On The Relative Importance Of Offshelf/Onshelf Drivers Of Variability In Mcdw Inventory On The Amundsen Shelf, Antarctica, Pierre St-Laurent, S. E. Stammerjohn, T. Maksym, R. M. Sherrell
Presentations
Ice shelves in the Amundsen Sea (west Antarctica) are melting rapidly and may raise global sea levels substantially over the coming century through reduced buttressing. The high basal melt rates are associated with the presence of warm modified Circumpolar Deep Water (mCDW) that intrudes across the continental shelf and melts the floating portion of the ice sheet from its base near the grounding zone. How much mCDW is present on the continental shelf (its volume inventory) is thus thought to be a key proxy for the year-to-year variability in ice shelf melt rates. Over the past decade, the literature has …
'Catch The King' Tide Thank You And Review, Jon Derek Loftis
'Catch The King' Tide Thank You And Review, Jon Derek Loftis
Presentations
"Catch the King" was a citizen science GPS data collection effort centered in Hampton Roads, VA, that mapped the King Tide's maximum inundation extents to validate and improve predictive models for future forecasting of increasingly pervasive "nuisance" flooding. GPS data points collected by volunteers effectively breadcrumbed/traced the high water line by pressing the 'Save Data' button in the Sea Level Rise App every few steps along the water's edge during the high tide on the morning of Nov. 5th, 2017.
Response from the event's dedicated volunteers, fueled by the local media partners' coverage leading up to the event, and over …
Understanding Patterns In Chesapeake Bay Water Clarity: The Importance Of Measurement, Location, And Physical Versus Biological Controls, Carl T. Friedrichs
Understanding Patterns In Chesapeake Bay Water Clarity: The Importance Of Measurement, Location, And Physical Versus Biological Controls, Carl T. Friedrichs
Presentations
No abstract provided.
Fractal Floc Properties In The Surface Waters Of A Partially-Mixed Estuary: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl T. Friedrichs, Grace M. Massey, David Bowers
Fractal Floc Properties In The Surface Waters Of A Partially-Mixed Estuary: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl T. Friedrichs, Grace M. Massey, David Bowers
Presentations
This study focuses on observations collected along the York River Estuary, major tidal tributary of the Chesapeake Bay, USA. Although microtidal in terms of tidal range, the partially-mixed York River Estuary experiences near-surface tidal currents of up to 1 m/s at spring tide (Friedrichs, 2009). Observations of particle properties were collected using a profiling system that includes a Laser InSitu Scattering and Transmissometry (LISST) 100X Type C instrument, a high-definition Particle Imaging Camera System (PICS) incorporating a video settling tube, and a high-speed pump sampler. At each sampling station, the profiler was lowered to a depth of 1-3m below the …
Evidence Of Muddy Aggregates As Resilient Pellets In Suspension Throughout The Water Column Using Traps And A Particle Image Camera System (Pics) In A Tidal Estuary, Grace Massey, Kelsey Fall, Carl Friedrichs, S. Jarrell Smith
Evidence Of Muddy Aggregates As Resilient Pellets In Suspension Throughout The Water Column Using Traps And A Particle Image Camera System (Pics) In A Tidal Estuary, Grace Massey, Kelsey Fall, Carl Friedrichs, S. Jarrell Smith
Presentations
Biogenic pelletization plays an important roll in the packaging of fine sediments to prevent their availability in contributing to the water clarity issues in coastal systems. On the order of 1000 5µm equivalent spherical diameter clay flocculi primary particles can be packaged in a single elliptical-inshape pellet, 100µm long and 30µm wide. This is a size consistent of those observed in our study area in the Clay Bank Area of the York River, a tributary of the Chesapeake Bay, Virginia, USA. If resuspended, this one pellet will have almost 25 times less surface area and thus have that much less …
Fractal Floc Properties In Estuarine Surface Waters: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl Friedrichs, Grace Massey, David Bowers
Fractal Floc Properties In Estuarine Surface Waters: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl Friedrichs, Grace Massey, David Bowers
Presentations
The goal of this study is to gain insight into the fractal properties of flocs in estuarine surface waters under conditions of variable floc size, density, concentration, and organic content. The properties of flocculated particles in estuarine surface waters are especially important to the fate of incident light, with direct ramifications for primary production, water quality, and optical remote sensing. Observations of particle properties were collected using a profiling system that includes a Laser In-Situ Scattering and Transmissometry (LISST) 100X Type C instrument, a high-definition Particle Imaging Camera System (PICS) incorporating a video settling tube, and a high-speed pump sampler. …
Improving Modeled Light Attenuation (Kd) In A Land-Estuarine Ocean Biogeochemical Model For Chesapeake Bay, Jessica Turner, Carl T. Friedrichs, Marjorie A.M. Friedrichs
Improving Modeled Light Attenuation (Kd) In A Land-Estuarine Ocean Biogeochemical Model For Chesapeake Bay, Jessica Turner, Carl T. Friedrichs, Marjorie A.M. Friedrichs
Presentations
No abstract provided.
Water Clarity Patterns And Trends In The Open-Water Regions Of Chesapeake Bay And Its Tidal Tributaries, Carl T. Friedrichs
Water Clarity Patterns And Trends In The Open-Water Regions Of Chesapeake Bay And Its Tidal Tributaries, Carl T. Friedrichs
Presentations
No abstract provided.
'Catch The King' Tide With Stormsense On Nov. 5th: How You Can Help Crowd-Source Tidal Flood Event Calibrations For Hampton Roads' Newest Water Level Sensors, Jon Derek Loftis, Harry Wang, David R. Forrest
'Catch The King' Tide With Stormsense On Nov. 5th: How You Can Help Crowd-Source Tidal Flood Event Calibrations For Hampton Roads' Newest Water Level Sensors, Jon Derek Loftis, Harry Wang, David R. Forrest
Presentations
Dr. Derek Loftis presented his recent research related to installing new water level sensors (and some of the early event data the network has captured during Hurricanes Jose and Maria) in many Hampton Roads municipalities with the StormSense Smart Cities project. This presentation also introduces information related VIMS efforts with the CCRFR and local news media in the organization of the 'Catch the King' Tide crowd-sourcing data event using the Sea Level Rise App.
Stac Review Panel For The Generalized Additive Model (Gam) Approach For Water Quality Trends In Tidal Waters, Carl T. Friedrichs
Stac Review Panel For The Generalized Additive Model (Gam) Approach For Water Quality Trends In Tidal Waters, Carl T. Friedrichs
Presentations
No abstract provided.
Chesapeake Bay Hypoxia Coastal Ocean Modeling Testbed, M.A.M. Friedrichs, Carl T. Friedrichs, I.D. Irby, A.J. Bever
Chesapeake Bay Hypoxia Coastal Ocean Modeling Testbed, M.A.M. Friedrichs, Carl T. Friedrichs, I.D. Irby, A.J. Bever
Presentations
No abstract provided.
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Presentations
No abstract provided.
Flocculation And Bed Consolidation In A Partially Mixed Estuary: An Idealized Numerical Sediment Transport Model, Courtney Harris, D. Tarpley, Carl Friedrichs, C. Sherwood
Flocculation And Bed Consolidation In A Partially Mixed Estuary: An Idealized Numerical Sediment Transport Model, Courtney Harris, D. Tarpley, Carl Friedrichs, C. Sherwood
Presentations
Particle settling velocity and bed erodibility impact the transport of suspended sediment to the first order, but are especially difficult to parameterize for the muds that often dominate estuarine sediments. For example, fine grained silts and clays typically form loosely bound aggregates (flocs) whose settling velocity can vary widely. Properties of flocculated sediment such as settling velocity and particle density are difficult to prescribe because they change in response to several factors, including salinity, suspended sediment concentration, turbulent mixing, organic content, and mineral composition. Additionally, mud consolidates after deposition, so that its erodibility changes over timescales of days to weeks …
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Presentations
No abstract provided.
Hypoxia Forecasts As A Tool For Chesapeake Bay Fisheries, Marjorie A.M. Friedrichs, A. J. Bever, Carl T. Friedrichs, R.R. Hood
Hypoxia Forecasts As A Tool For Chesapeake Bay Fisheries, Marjorie A.M. Friedrichs, A. J. Bever, Carl T. Friedrichs, R.R. Hood
Presentations
No abstract provided.
Stormsense Project: Forecasting Flooding From Storm Surge, Rain, And Tide, Jon Derek Loftis, David R. Forrest, Kyle Spencer
Stormsense Project: Forecasting Flooding From Storm Surge, Rain, And Tide, Jon Derek Loftis, David R. Forrest, Kyle Spencer
Presentations
The objective of StormSense is to enhance the capability of communities to prepare and respond to the disastrous impacts of sea level rise and coastal flooding in ways that are replicable, scalable, measurable, and make a comparable difference worldwide. The StormSense Project is an inundation forecasting research initiative partially funded by the National Institute of Standards and Technology to advance the field of emergency preparedness for flooding resulting from storm surge, rain, and tides. The scope of the project encompasses the interests of coastal local governments wishing to enhance their emergency preparedness via a network of 'Internet of Things' (IoT)-enabled …
Hypoxia Forecasts As A Tool For Chesapeake Bay Fisheries, Marjorie A.M. Friedrichs, R.R. Hood, Carl T. Friedrichs, David R. Forrest
Hypoxia Forecasts As A Tool For Chesapeake Bay Fisheries, Marjorie A.M. Friedrichs, R.R. Hood, Carl T. Friedrichs, David R. Forrest
Presentations
The Estuarine Hypoxia component of the U.S. Integrated Ocean Observing System Coastal and Ocean Modeling Testbed (COMT) is evaluating existing hydrodynamic and water quality models used, or likely to be used, for operations in the Chesapeake Bay. As a proof-of-concept, an implementation of the Regional Ocean Modeling System in the Chesapeake Bay (ChesROMS) is linked to a simple respiration model for hypoxia (Hypoxia_SRM). The modeling system is presently being used to produce real-time nowcasts and short-term (3-day) hypoxia forecasts for the Chesapeake Bay, which are currently available on the Virginia Institute of Marine Science (VIMS) website. Workshops with citizen stakeholders …
Synthesis: Understanding Of Chesapeake Bay Water Clarity Patterns, Carl Friedrichs
Synthesis: Understanding Of Chesapeake Bay Water Clarity Patterns, Carl Friedrichs
Presentations
No abstract provided.
Suspended Sediment Size Distribution In A Numerical Sediment Transport Model For A Partially-Mixed Estaury, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Suspended Sediment Size Distribution In A Numerical Sediment Transport Model For A Partially-Mixed Estaury, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Presentations
Particle settling velocity impacts the transport of suspended sediment to the first order but fine-grained material like muds tend to form loosely bound aggregates (flocs) whose settling velocity can vary widely. Properties of flocculated sediment such as settling velocity and particle density are difficult to predict because they change in response to several factors including salinity, suspended sediment concentration, turbulent mixing, and organic content. Knowledge of the mechanisms governing flocculation of cohesive sediment is rapidly expanding; especially in response to recent technical advances. As the understanding of particle dynamics progresses, numerical models describing flocculation and break-up are being developed with …
Fractal Floc Size, Density, Settling Velocity, And Implications For Water Clarity In Partially Mixed-Estuaries: The Role Of Small, Organic-Rich Particles, Kelsey Fall, Carl Friedrichs, Grace M. Massey, Jessie Turner
Fractal Floc Size, Density, Settling Velocity, And Implications For Water Clarity In Partially Mixed-Estuaries: The Role Of Small, Organic-Rich Particles, Kelsey Fall, Carl Friedrichs, Grace M. Massey, Jessie Turner
Presentations
Typical near-surface estuarine particles are not single solid particles, but clusters of inorganic and organic particles and water, called flocs. Floc properties that influence water clarity (such as size, composition, density and settling velocity) are challenging to observe in-situ, so their influence on the optical properties of the system is not well understood. The preliminary results presented here are part of a larger effort utilizing a combination of particle imaging equipment, water sampling, and optical instrumentation to measure important floc properties, to investigate the influence of organic particles and local hydrodynamics on those properties, and to evaluate the influence of …
Street-Level Inundation Modeling Of Hurricanes Matthew And Hermine And Emerging Flood Monitoring Methods In Hampton Roads, Jon Derek Loftis, H. V. Wang, D R. Forrest
Street-Level Inundation Modeling Of Hurricanes Matthew And Hermine And Emerging Flood Monitoring Methods In Hampton Roads, Jon Derek Loftis, H. V. Wang, D R. Forrest
Presentations
No abstract provided.
Fractal Floc Size, Settling Velocity And Implications For Water Clarity In Partially Mixed-Estuaries: The Role Of Small, Organic-Rich Particles, Kelsey Fall, Carl Friedrichs, Grace M. Cartwright, D.G. Bowers
Fractal Floc Size, Settling Velocity And Implications For Water Clarity In Partially Mixed-Estuaries: The Role Of Small, Organic-Rich Particles, Kelsey Fall, Carl Friedrichs, Grace M. Cartwright, D.G. Bowers
Presentations
Observations and analysis presented here suggest that properties of suspended particulate matter (SPM) in the water column of partially mixed estuaries, including floc size and settling velocity, are strongly related to the relative concentrations of inorganic versus organic matter in suspension. In regions with high inorganic SPM concentrations, addition of organic matter tends to increase the median size and settling velocity of flocs, removing both organic and inorganic SPM from the water column and enhancing water clarity relative to that in the absence of organics. In contrast, in regions with lower inorganic SPM concentration, suspended organic matter appears to decrease …
In Situ Differentiation Among Suspended Primary Particles, Resilient Pellets And Flocs Of Similar Size Using A Particle Image Camera System (Pics) In A Muddy Estuary, Grace M. Massey, Kelsey Fall, Carl Friedrichs, S.J. Smith
In Situ Differentiation Among Suspended Primary Particles, Resilient Pellets And Flocs Of Similar Size Using A Particle Image Camera System (Pics) In A Muddy Estuary, Grace M. Massey, Kelsey Fall, Carl Friedrichs, S.J. Smith
Presentations
No abstract provided.
Relationships Among Estuarine Floc Size, Optical Properties, Organic Content, And Settling Velocity: Insights Gained From Combining Lisst And A Particle Imaging Camera System, Kelsey Fall, Carl Friedrichs, Grace M. Cartwright, D.G. Bowers
Relationships Among Estuarine Floc Size, Optical Properties, Organic Content, And Settling Velocity: Insights Gained From Combining Lisst And A Particle Imaging Camera System, Kelsey Fall, Carl Friedrichs, Grace M. Cartwright, D.G. Bowers
Presentations
No abstract provided.
Self-Burial Of Objects On Sandy Beds By Wave- And Current-Induced Scour, Carl Friedrichs, S.E. Rennie, A. Brandt
Self-Burial Of Objects On Sandy Beds By Wave- And Current-Induced Scour, Carl Friedrichs, S.E. Rennie, A. Brandt
Presentations
When an object sitting on the bed extends above the surrounding bed roughness, the object will alter the local flow pattern relative to the far field boundary layer. Such perturbations increase the velocities and stresses impinging on sediment immediately adjacent to the object. Nearby grains tend to be dispersed, resulting in a scour pit that deepens until the tendency for sediment to be dispersed is balanced by a tendency for sediment to fall back into the pit. The difference in pressure at the bed upstream and downstream of the object may also drive seepage flow which can cause piping and …
Comt Chesapeake Bay Hypoxia Modeling, M.A.M. Friedrichs, Carl T. Friedrichs, M. Scully, I. Irby, Comt Estaurine Hypoxia Team
Comt Chesapeake Bay Hypoxia Modeling, M.A.M. Friedrichs, Carl T. Friedrichs, M. Scully, I. Irby, Comt Estaurine Hypoxia Team
Presentations
No abstract provided.
Comparison Of Modeled And Observed Bed Erodibility In The York River Estuary, Virginia, Over Varying Time Scale, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Comparison Of Modeled And Observed Bed Erodibility In The York River Estuary, Virginia, Over Varying Time Scale, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Presentations
In general, the availability of sediment for transport increases with the magnitude of bed shear stress, which varies over various temporal and spatial scales. However, in a muddy setting, consolidation or swelling of the bed also contributes to fluctuations in sediment mobility. One such environment is the York River estuary, a partiallymixed tidal tributary of the Chesapeake Bay, USA. The York River often has a Secondary Turbidity Maximum (STM) mid-estuary at the transition from a shallower, less stratified section upstream to a deeper, more stratified section downstream. Since 2006 various instrument arrays have been deployed as part of the Multidisciplinary …
Us-Ioos/Comt Estuarine Hypoxia Nowcast/Forecast Product: Identification And Feedback, Carl T. Friedrichs, Marjorie A.M. Friedrichs, David R. Forrest, R.R. Hood
Us-Ioos/Comt Estuarine Hypoxia Nowcast/Forecast Product: Identification And Feedback, Carl T. Friedrichs, Marjorie A.M. Friedrichs, David R. Forrest, R.R. Hood
Presentations
The Estuarine Hypoxia component of the U.S. Integrated Ocean Observing System (US-IOOS) Coastal and Ocean Modeling Testbed (COMT) is evaluating existing hydrodynamic and water quality models used or likely to be used for operations and/or for regulation in the Chesapeake Bay and other, similar estuarine environments. The outcomes of this work are expected to help with the development of operational hypoxia forecast capabilities for the Bay. As a proof-of-concept, the ChesROMS hydrodynamic model, linked to a 1-term constant respiration equation for dissolved oxygen (DO), is presently being used to produce realtime now-casts and shortterm (3-day) forecasts of DO for the …
Consolidation And Stratification Within A Muddy, Partially Mixed Estuary: A Comparison Between Idealized And Realistic Models For Sediment Transport In The York River Estuary, Virginia, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Consolidation And Stratification Within A Muddy, Partially Mixed Estuary: A Comparison Between Idealized And Realistic Models For Sediment Transport In The York River Estuary, Virginia, Danielle Tarpley, Courtney Harris, Carl Friedrichs
Presentations
The York River estuary is a partially mixed semi-diurnal tidal tributary of the Chesapeake Bay with salinities ranging from 0 to 26 psu and an ~0.8 m tidal range. Sediment within many estuaries, including the York River, Virginia, is dominated by mixtures of mud. Due to its cohesive nature, estimating sediment fluxes for mud is a complex problem that can be addressed using numerical models such as the Community Sediment Transport Modeling System (CSTMS), which incorporates suspended sediment transport, erosion, and deposition within the hydrodynamic Regional Ocean Modeling System (ROMS). One version of the CSTMS accounts for cohesive processes via …
Identification Of Suspended Resilient Pellets In Particles Tracked By A Particle Image Camera System (Pics) In A Muddy Estuary, Grace M. Massey, Kelsey Fall, Carl Friedrichs, S.J. Smith
Identification Of Suspended Resilient Pellets In Particles Tracked By A Particle Image Camera System (Pics) In A Muddy Estuary, Grace M. Massey, Kelsey Fall, Carl Friedrichs, S.J. Smith
Presentations
No abstract provided.