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Projects

Assessment of the Short- and Long-term Socioeconom...

This project, funded by NCCOS through the Gulf of Mexico Coastal Ocean Observing System, will comprehensively quantify and qualify the short- and long-term socioeconomic impacts of the 2017-2019 Karenia brevis ...

Biological Vulnerability to Hypoxia from Climate W...

This project will provide critical information and predictive tools to coastal managers for understanding how species will respond to changing hypoxia conditions from ongoing and projected warming in the Gulf ...

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 ...

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 ...

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 ...

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 ...

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 ...

LEOFS-Hypoxia: Operational Lake Erie Hypoxia Forec...

Deep waters of Lake Erie’s central basin have areas of low dissolved oxygen. Weather conditions can determine if this low oxygen (hypoxic) water will be taken up by treatment plants, ...

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 ...

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 ...

News

Pedestrian and Vehicle Counters Installed to Asses...

To prioritize investments in protection and restoration, managers need to know how people value natural resources and if management actions affect those values. Social scientists at NCCOS are using human ...

Gulf of Mexico Hypoxia Task Force Convenes Annual ...

The Mississippi River Gulf of Mexico Watershed Nutrient Task Force, otherwise known as the Hypoxia Task Force (HTF), held its 38th annual meeting which highlighted ongoing efforts by HTF members to improve ...

Below Average Summer 2023 ‘Dead Zone’ Measured in ...

NCCOS-supported scientists have determined that this year’s Gulf of Mexico “dead zone” — an area of low oxygen that can kill fish and marine life — is approximately 3,058 square ...

NOAA Forecasts Smaller than Average ‘Dead Zone’ fo...

The Mississippi River watershed, which encompasses over 40% of the continental U.S and crosses 22 state boundaries, is made up of farms (yellow), cities (red), and natural lands (green). Nitrogen ...

New Funding to Reduce Nutrient Pollution Reviewed ...

The Gulf of Mexico Hypoxia Task Force held its 37th annual meeting in December to review ongoing actions to improve water quality in the Mississippi River basin and to discuss ...

New Short Film on Understanding Hypoxia: Dead Zone...

With funding from NCCOS, a short film, "Understanding Hypoxia: Dead Zones on the Pacific Coast", was produced by Oregon State Productions, a documentary film team at Oregon State University. The ...

NCCOS Assists Response to Harmful Algal Bloom in t...

Dead sturgeon observed floating during USGS field sampling in South Bay. NOAA’s National Centers for Coastal Ocean Science (NCCOS) provided a Harmful Algal Bloom (HAB) Event Response award of $15,420 ...

Smaller than Expected Summer 2022 ‘Dead Zone’ Meas...

(Top) Map of measured Gulf hypoxia zone, July 25 – August 1, 2022. Red area denotes 2 mg/L of oxygen or lower, the level which is considered hypoxic, at the ...

NOAA Forecasts An Average ‘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— to be ...

Modeling Shows Nitrogen Reductions Have Decreased ...

Management actions since the mid-1980s have reduced nutrient inputs to Chesapeake Bay, resulting in a smaller, annual “dead zone” — an area in the bay that lacks the oxygen needed ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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, ...

General Pages

Advancing Pollution Science

NCCOS conducts national and long-term research and assessments to understand the effects of contaminants, nutrients, and hypoxia. Measuring contaminants in mussels and oysters, or the breadth of Gulf of Mexico's ...

Charleston

The Hollings Marine Laboratory is built on an approximately 8-acre site within the Fort Johnson campus of the South Carolina Marine Resources Center in Charleston, South Carolina. Dedicated on December ...

Dead Zone

Since its inception in 1990, the National Centers for Coastal Ocean Science has provided the research foundation upon which management of the "dead zone" in the Gulf of Mexico is ...

Harmful Algal Blooms

Harmful algal blooms (HABs) occur when algae—simple photosynthetic organisms that live in the sea and freshwater—grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine ...

Hypoxia

Hypoxia occurs when the amount of oxygen in water becomes too low to support most aquatic life (typically below 2 mg/L). Hypoxia is an expanding global problem and a symptom ...

NCCOS Tools and Products

NCCOS provides research, scientific information and tools to help balance the nation's ecological, social, and economic goals. Explore our products by filtering category, region, or product type. Select a product ...

NGOMEX

The northern portion of the Gulf of Mexico ecosystem, a region containing almost half of the nation's coastal wetlands and supporting commercial fisheries generating $1 billion annually, has undergone profound ...

Pollution

Last summer's dead zone measured 3,058 square miles, below the forecasted areaContaminants and nutrients pollute the marine and coastal environment, causing acute or long-term impacts to ecosystems, humans, and animals—from ...

Silver Spring

Silver Spring is the location of NCCOS headquarters, the Competitive Research Program, as well as scientific expertise in biogeography, habitat mapping, HAB forecasting and monitoring, and bioeffects of chemical contaminants.NCCOS ...

Students

We 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 e-reader accessible.NCCOS ...

NOAA Internship Opportunities

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