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Projects

Forecasting the Causes, Consequences, and Potentia...

In recent years, the central basin of Lake Erie has experienced low-oxygen conditions, despite measures taken by surrounding states and provinces to reduce nutrient inputs. We studied the factors that ...
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Hypoxia in Green Bay, Wisconsin: Biogeochemical Dy...

Hypoxia conditions have plagued the lower part of Lake Michigan’s Green Bay and the Fox River for decades. We know nutrients are contributing to the problem, and we are developing ...
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Hypoxia’s Effects on the Shrimp Fishery in the Nor...

Our research is the first to investigate hypoxia’s effects on the harvest and economic dynamics of a Gulf of Mexico shrimp fishery. By linking hypoxia to impacts on fisheries, we ...
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Impacts of Hypoxia on Fish and Fisheries in the No...

To protect fisheries and support ecosystem-based resource management in the northern Gulf of Mexico, we are developing modeling tools that will evaluate and simulate how large-scale changes in forcing factors ...
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Integrated Ecosystem Modeling of the Causes of Hyp...

The largest low oxygen (hypoxic) zone affecting the United States is in the northern Gulf of Mexico, adjacent to the Mississippi River. This “dead zone” in the Gulf of Mexico ...
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Mechanisms Controlling Hypoxia – Glider Applicatio...

We evaluated the use of gliders to improve Gulf of Mexico hypoxic zone monitoring. The efficacy of this technology was determined and we developed a comprehensive plan that integrates glider ...
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Mechanisms Controlling Hypoxia – Integrated Causal...

We’re examining the complex physical and biogeochemical relations that control and maintain the low-oxygen dead zone in the northern Gulf of Mexico (nGOM). We are combining field data from moored ...
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Modeling Hypoxia and Ecological Responses to Clima...

We are developing modeling tools that can be used to predict ecological responses to climate and nutrient input management in coastal systems. This project is part of NOAA’s Coastal Hypoxia ...
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Modeling Impacts of Hypoxia in the Northern Gulf o...

We are determining the effects of hypoxia (low dissolved oxygen) on reproduction of fish (Atlantic croaker) throughout the northern Gulf of Mexico to accurately model population outcomes and to assess ...
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Shallow Water Hypoxia: Tipping the Balance for Ind...

We are investigating the impacts of extreme daily fluctuations in oxygen and pH on fish and invertebrates in the Chesapeake Bay. The modeling tools we produce will improve the ability ...
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News

Florida Event Response Funding Helps Jump-Start Ci...

A relatively small, one-time NCCOS funding contribution to aid the study of red tide off southwest Florida has helped produce an unexpected long-term benefit – the establishment of a citizen ...
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Testing the Feasibility of Robotic Gliders to Moni...

NCCOS has evaluated the use of underwater gliders to improve Gulf of Mexico hypoxic zone, also known as the dead zone, monitoring. This effort resulted in the development of a ...
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Large ‘Dead Zone’ Measured in Gulf of Mexico

Dr. Nancy Rabalais (at left) and crew, aboard R/V Pelican, prepare to deploy a conductivity, temperature, and depth (CTD) carousel (rosette) containing an array of Niskin water sampling bottles. The ...
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Impacts and Solutions to Gulf of Mexico Hypoxia Hi...

Shrimp boat underway in the Gulf of Mexico. Hypoxia is impacting commercial shrimp fishing. Credit NOAA Photo Library. With a record setting dead zone predicted this summer, Illinois Public Media ...
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With Second Workshop, NCCOS Continues Focus on Hyp...

Credit S. Brandt, OSU. Building on results of an initial 2017 workshop, a second advisory panel workshop concerning the effects of low dissolved oxygen in water (hypoxia) was held June ...
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NOAA Forecasts Very Large ‘Dead Zone’ for Gulf of ...

NCCOS scientists are forecasting this summer’s Gulf of Mexico hypoxic zone or "dead zone"—an area of low to no oxygen that can kill fish and other marine life—will be approximately ...
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Scientists Use New Technique to Measure Size of Gu...

Every summer, the largest hypoxic zone in the U.S. forms in the northern Gulf of Mexico, resulting in widespread ecosystem and economic impacts. Determining, and then mitigating the size of ...
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NCCOS Forecasts, Funding, Research Help South Flor...

Dead fish on beach near Sarasota, Florida, killed by brevetoxins from 2018 red tide. Credit: Bob Currier, Texas A&M University. NCCOS is doing several things to help south Florida address ...
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Summer ‘Dead Zone’ Smaller than Averag...

NOAA-supported scientists, led by partners at the Louisiana Universities Marine Consortium (LUMCON) and Louisiana State University, have determined that this year’s Gulf of Mexico “dead zone”—an area of low oxygen ...
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NCCOS and NGI Lead First Fisheries Monitoring Work...

Monitoring dead zone oceanographic parameters and understanding how hypoxia impacts fisheries in the region is key to a successful Cooperative Hypoxia Assessment and Monitoring Program. Credit: LUMCON NCCOS and NOAA’s ...
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Products

Maps, Tools & Applications

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Data & Publications

A coupled physical-biological model of the Northern Gulf of Mexico shelf: model description, validation and analysis of phytoplankton variability

The Texas-Louisiana shelf in the Northern Gulf of Mexico receives large inputs of nutrients and freshwater from the Mississippi/Atchafalaya River system. The nutrients stimulate high rates of primary production in the river plume, which contributes to the development of a ...
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A modeling study of physical controls on hypoxia generation in the northern Gulf of Mexico

The Louisiana shelf (LA shelf) in the northern Gulf of Mexico experiences hypoxic conditions every summer due to the combination of eutrophication and strong water column stratification. Here we use a three-dimensional circulation model coupled with a simple oxygen model ...
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Dispersal of Mississippi and Atchafalaya Sediment on the Texas-Louisiana Shelf: Model Estimates for the Year 1993

A three-dimensional coupled hydrodynamic-sediment transport model for the Texas–Louisiana continental shelf was developed using the Regional Ocean Modeling System (ROMS) and used to represent fluvial sediment transport and deposition for the year 1993. The model included water and sediment discharge ...
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Effects of model physics on hypoxia simulations for the northern Gulf of Mexico: A model intercomparison

A large hypoxic zone forms every summer on the Texas-Louisiana Shelf in the northern Gulf of Mexico due to nutrient and freshwater inputs from the Mississippi/Atchafalaya River System. Efforts are underway to reduce the extent of hypoxic conditions through reductions ...
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Ensemble modeling informs hypoxia management in the northern Gulf of Mexico

A large region of low-dissolved-oxygen bottom waters (hypoxia) forms nearly every summer in the northern Gulf of Mexico because of nutrient inputs from the Mississippi River Basin and water column stratification. Policymakers developed goals to reduce the area of hypoxic ...
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Historical trends of hypoxia in Changjiang River estuary: Applications of chemical biomarkers and microfossils

Over the past two decades China has become the largest global consumer of fertilizers, which has enhanced river nutrient fluxes and caused eutrophication and hypoxia in the Yangtze (Changjiang) large river delta-front estuary (LDE). In this study, we utilized plant ...
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Interannual Variation in Stratification over the Texas–Louisiana Continental Shelf and Effects on Seasonal Hypoxia

A numerical dye is used to track freshwater released in May and June from the Mississippi and Atchafalaya rivers using a hydrodynamic model. These months are chosen because discharge and nutrient load in May and June is significantly correlated with ...
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Linking molecular microbial ecology to geochemistry in a coastal hypoxic zone

Multiple environmental mechanisms have been proposed to control bottom water hypoxia (<2 mg O2 L?1) in the northern Gulf of Mexico Louisiana shelf. Near-bottom hypoxia has been attributed to a direct consumption of oxygen through benthic microbial respiration and a ...
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Modeling Coastal Hypoxia: Numerical Simulations of Patterns, Controls and Effects of Dissolved Oxygen Dynamics

This book provides a snapshot of representative modeling analyses of coastal hypoxia and its effects. Hypoxia refers to conditions in the water column where dissolved oxygen falls below levels that can support most metazoan marine life (i.e., 2 mg O2 ...
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Modeling River-Induced Phosphorus Limitation in the Context of Coastal Hypoxia

The urban development of coastal areas and the increased use of chemical fertilizers over the last century have led to a worldwide expansion of coastal eutrophication and a significant increase in the occurrence and intensity of human-induced coastal hypoxia. Proportionally, ...
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General Pages

CHRP

Coastal Hypoxia Research Program (CHRP)The Coastal Hypoxia Research Program (CHRP) is a competitive research program focused on advancing the understanding, detection, prediction, control, mitigation, and response to hypoxia events in ...
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Dead Zone

NCCOS-Supported Research Provides Foundation for Management of the 'Dead Zone' in the Northern Gulf of MexicoSince its inception in 1990, the National Centers for Coastal Ocean Science has provided the ...
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Hypoxia Program

Hypoxia Research ProgramsWe investigate the relationship between nutrient pollution and downstream impacts to aquatic ecosystems. The figure below depicts the influence of nutrient pollution that drains into the Mississippi River ...
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NGOMEX

Northern Gulf of Mexico Ecosystems & Hypoxia Assessment (NGOMEX) BackgroundThe northern portion of the Gulf of Mexico ecosystem, a region containing almost half of the nation's coastal wetlands and supporting ...
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Stressor Impacts and Mitigation

Stressor Impacts & MitigationHarmful Algal BloomsManagers of fisheries, beaches, and water treatment facilities need information on HAB detection and forecasting to plan for and deal with the adverse environmental, economic, ...
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Students

Opportunities for StudentsWe have an active intern program. NCCOS interns work on projects ranging from field sampling for harmful algal blooms to developing an office blog to making our reports ...
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Targeted Efforts to Support Nutrient Management

Targeted Efforts to Support Nutrient ManagementNCCOS supports observations and monitoring for variables that are important to modeling hypoxia in time and space. These models are then used to inform key ...
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NOAA Internship Opportunities

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NCCOS delivers ecosystem science solutions for stewardship of the nation’s ocean and coastal resources, in direct support of NOS priorities, offices, and customers, and to sustain thriving coastal communities and economies.

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