Targeted Efforts to Support Nutrient Management

NCCOS supports observations and monitoring for variables that are important to modeling hypoxia in time and space. These models are then used to inform key organizations working to reduce the impacts of ecosystem stressors such as hypoxia. A primary focus of the work is on questions to understand the conditions driving hypoxia in a region and to help resource managers understand the impact of hypoxia on natural resources and the associated nutrient reductions required to reduce any negative impacts. The Hypoxia Task Force (HTF) is a main user of the model forecasts in the Gulf of Mexico.

Gulf of Mexico Hypoxia Task Force Support

In the Gulf of Mexico, nutrient loading from the Mississippi and Atchafalaya Rivers leads to seasonal formation of hypoxia in a region over the Mississippi Bight/Louisiana/Texas continental shelf, the largest recurring hypoxic zone in the U.S. and second largest in the world. Reducing the size and mitigating the effects of this large dead zone is one of the biggest ecosystem management challenges faced by the nation, as the nutrients drain from a watershed covering more than 40% of the contiguous United States. Management strategies to reduce the size of the dead zone in the northern Gulf of Mexico are developed through the Mississippi River/Gulf of Mexico Watershed Nutrient Task Force.

NCCOS has a long history of supporting the HTF through research advances on dead zone causes and impacts, results of which are used to refine nutrient abatement strategies to improve their effectiveness. To learn about the history of NCCOS support for the HTF, click here. NCCOS scientific support comes from both competitive programs sponsoring extramural investigators (e.g. NGOMEX) and NOAA supported activities executed by NCCOS scientists (below).

NOAA Hypoxia Forecasts

  • Model Development and Forecasting the Dead Zone in the Gulf of Mexico
    NCCOS has funded the development of several Gulf of Mexico models evaluating the causes of the Gulf of Mexico dead zone. These models in addition to others developed by EPA have been used to determine the percent reduction in nutrient loads needed to reduce the size of the dead zone to the HTF mitigation goal (5,000 km2). Since 2003, several of these models have forecasted the size of the dead zone in the Northern Gulf of Mexico. This prediction helps managers, policy makers, and the public better understand the relationship between Mississippi River nutrient loading and the magnitude of the dead zone.

  • NOAA Operation of an Ensemble Model comprised of four models was fully transitioned to NOAA in June 2018. These models allow for assessment of the relationship between nitrogen and the zone size, to inform the nitrogen reduction required to achieve the HTF hypoxic zone reduction goal (outlined in prior bullet).

  • Modeling and Forecasting Hypoxia in the rest of U.S. Coastal Waters
    The number of areas in coastal waters with dead zones is expanding globally, now over four hundred coastal systems worldwide, including 166 in U.S. waters. A review paper (SCIENCE Aug. 15, 2008) by NCCOS Coastal Hypoxia Research Program (CHRP)-funded researcher Robert Diaz of the Virginia Institute of Marine Science and Rutger Rosenberg of the University of Gothenburg, attributes this dramatic trend to increasing nutrient pollution and the burning of fossil fuels. These trends have continued (Breitburg et al. 2018).

    NCCOS-funded projects include hypoxia model development for Chesapeake Bay/Delaware Inland Bays, Narragansett Bay, Saginaw Bay, Lake Erie, and Green Bay, and one major watershed hypoxia project for Atlantic and Gulf coast estuaries. The project scientists are working closely with coastal resource managers to cater the model outcomes to information needed for coastal zone and nutrient management decisions. More information on the Coastal Hypoxia Research Program (CHRP).

Hypoxia National Office / Northern Gulf Institute (NGI)

The Northern Gulf Institute houses the Gulf of Mexico Hypoxia Office. Beginning in 2010, NOAA and NGI have collaborated to advance research and management of northern Gulf of Mexico hypoxia, co-leading annual Hypoxia Research Coordination Workshops, coordinating ongoing research activities, and providing information to advance management actions to mitigate hypoxia by the HTF, the Gulf of Mexico Alliance, and other Gulf ecosystem restoration efforts. Three key areas directed through the Hypoxia National Office include supporting the annual Gulf of Mexico Dead Zone measurement, developing the Cooperative Hypoxia Assessment and Monitoring Program, and conducting annual targeted workshops to advance hypoxia research and management.


Size of bottom-water hypoxia in mid-summer
Data sources: Nancy Rabalais (LSU/LUMCON), and NOAA. Funding sources: NOAA's National Centers for Coastal Ocean Science and U.S. EPA's Gulf of Mexico Program.

  • Gulf Hypoxia Monitoring Workshop
    NGI has hosted a series of workshops organizing scientists around better orchestrating monitoring in the gulf region and furthering scientific understanding of the dynamics of the hypoxic zone, as well as the zone’s impacts on ecosystem health and the economy. At the workshops, Gulf Hypoxia Monitoring Stakeholder Committees gathered to coordinate hypoxia monitoring activities to reduce redundancies and increase awareness of the Hypoxia Monitoring. These groups identified both information needs of management, as well as key monitoring and science gaps. Details and library of presentations and meeting proceedings documents can be found here.

  • The Cooperative Hypoxia Assessment and Monitoring Program
    CHAMP is a grass roots effort that emerged from a Gulf-wide recognized need for improved hypoxia monitoring. Gulf researchers, federal and state managers, and stakeholders met at the 6th Annual NOAA/NGI Hypoxia Research Coordination Workshop in Stennis, MS on Sept. 12-13, 2016 to develop a robust and sustainable hypoxia monitoring program to fill this need. Monitoring requirements associated with the CHAMP program are based on four core principles - management drivers, broad community participation, partners with multiple interests, and diversifying financial support. Subsequently eight monitoring workgroups formed representing different regions, focal areas, and management concerns Dedicated to constructing building blocks for CHAMP (see figure below) and now some 60+ members strong and growing, the workgroups are integrating important assets for a Gulf-wide water quality-monitoring program encompassing hypoxia.


The eight workgroups of the Cooperative Hypoxia Assessment and Monitoring Program (CHAMP) in Northern Gulf of Mexico. Descriptions of the workgroups goals, activities, and ongoing accomplishments can be found here.