We are excited to share the launch of a new tool to help the public visualize contamination levels and potential risks of illness in the coastal ocean of the San Diego-Tijuana border region. The efforts were a result of a pollution transport experiment that began in 2015. It revealed how nearshore currents near Imperial Beach can transport pollution along the coast. In 2021, the transport experiment was coupled with known sewage sources, which resulted in the first iteration of a coastal ocean, pathogen, and human-illness model. Seeing the value in this work, the State of California awarded Scripps Institution of Oceanography $3 million in 2023 to further advance the pathogen forecast model to what we have today. There are plans to continue improvements, with a phase 2 starting summer of 2026. It will validate the forecast for improved swimmer illness risk - stay tuned.
Interested? Learn more below
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Persistent HAB Event Devastating Local Wildlife
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SCCOOS HAB monitoring infrastructure began to show a significant phytoplankton bloom in December 2024 that persisted through May 2025. Impacts were mostly seen in marine mammal populations, however, that began to shift in March (seabirds and shellfish). The ecological impacts observed during this period have surpassed those of the past four years, with toxins affecting CA sea lions and other pinnipeds, dolphins, sea birds, larger cetaceans, and producing shellfish and sardine advisories from Santa Barbara to San Diego.
The longest, nearshore cold water episode since the La Niña year of 2011 likely contributed to the origin of this bloom period as early as December 2024 in Baja and at Scripps Pier and sustained it through February to April. The cold water brought elevated nutrient levels – silicic acid and nitrate – setting the stage for a major bloom of toxic Pseudo-nitzschia. This was followed by the emergence of several other HAB taxa, most notably an extensive toxic Alexandrium bloom that caused an unusually prolonged saxitoxin advisory in shellfish for southern California areas, such as San Diego. Currently shellfish and sardine restrictions have been lifted for the southern California region, but shellfish advisories remain for central and northern California.
Click on our informational flyers to learn more: 2025 SoCal Paralytic Shellfish Poisoning (PSP) Data Flyer | 2025 SoCal Domoic Acid (DA) Data Flyer | 2025 SoCal DA + PSP HAB Informational Flyer
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SCCOOS Gains Important Subject Matter Experts for Our Advisory Boards
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Pictured left to right: Paula Sylvia - Port of San Diego, Craig Shuman - CA Dept. of Fish and Wildlife, Stacee Karnya - City of Los Angeles, and Emily Bockmon - CalPoly San Luis Obispo
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New Deployment: HARP Sound Station
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Photos gleaned from Scripps Acoustics Ecology Laboratory website
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Important Upgrades & Transitions: High Frequency Radar
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Thanks to the first round of Infrastructure Investment Jobs Act funding, scientists at University of Southern California replaced a new dome style CODAR Ocean Sensor antenna and router at our Point Fermin site (star on map below) located in the San Pedro neighborhood of Los Angeles. These measurements give us Surface Currents, ocean observations that are foundational to oil spill response and recovery, search and rescue, ecosystem management, and much more.
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SCCOOS program staff and broader network of scientists and committee members spend countless hours creating content for online outreach campaigns and participating in activities with the intent of increasing awareness of ocean observations. Please consider signing up for our email list. Our bi-monthly On The Horizon plugs you into current opportunities and resources. Our PI Spotlights show the people that make up our team, how ocean observing is done, and the societal benefits they provide.
Below is a highlight of what we have been up to for the past few months.
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Alongside IOOS Association and the 11 regional associations of IOOS, SCCOOS celebrated Ocean Data Day. Leveraging a campaign led by Makenna Martin, SCCOOS’s outreach specialist, inviting the public to dive into the data below the surface - exploring the critical role ocean observing plays in business & commerce, research, and safety for everyone in the United States. Highlighting our involvement in Oil Spill Response and Recovery, Port Operations, Search & Rescue, Sharks, Border Water Quality, and Harmful Algal Bloom Monitoring.
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Study Reveals 2023 Set a Record for Marine Heatwaves | Inside Hook, features SCCOOS PI Ryan Walter (CalPoly)
- Walking the Pier: Women in Scripps Plankton Research | UCSD TV:Features SCCOOS PI, Melissa Carter
- The North American Marine Environment Protection Association (NAMEPA) has released a new Maritime Exploration Guide to introduce students, educators, counselors, and families to the vast opportunities that exist within the maritime industry.
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Meet LA’s detective for dead marine mammals | High Country News, features SCCOOS Director, Clarissa Anderson
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The ocean flows downhill near the seafloor and recirculates uphill above. Nature Communications, features SCCOOS PI, Jim McWilliams (UCLA)
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What to do if you see a shark in the ocean | Los Angeles Times, features SCOOSS PI Chris Lowe (CSULB)
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NOAA is establishing a Cooperative Institute Fostering Aquaculture Research and Marketing (CIFARM) and is seeking applications for projects focused on aquaculture and the coastal economy | Applications due Sep. 5
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Aug 13: Ask an Expert, a virtual panel and Q&A on the topic of the impact of HABs - Moderated by SCCOOS Director Clarissa Anderson
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Aug. 14: 30x30 Partnership 2025 Summit @ The Nat, San Diego, CA
- Aug. 19: Q&A webinar for the 2025 Climate Resilient Fisheries Engagement Grants
- Aug. 24-26: The Marine Technology Society is hosting the Oceans In Action 2025 Workshop featuring marine science/technology research efforts along the Gulf Coast. Biloxi, MS.
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Sept 9-11: Marine Mammal Commission Annual Meeting at Scripps Seaside Forum, on SIO campus - Clarissa Anderson presenting on Sept.11, "Regional Updates: Hot Topics in the California Current Ecosystem".
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Sept. 15-18: Black in Marine Science (BIMS) Week: Blue Horizon Summit – marine scientists, policymakers, and innovators come together to co-create solutions for coastal resilience, ocean justice, and workforce equity. San Diego, CA & Virtual
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Sep. 20: Ocean Protection Council Meeting, Sacramento CA & Virtual
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Sept 22-24: Eastern Pacific Ocean Conference, Fallen Leaf Lake, CA - Clarissa Anderson presenting
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Sept 23-25: ICES-IOC Workshop on automated plankton analysis using imaging in flow methods, Oslo, Norway
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Sept. 29-Oct. 2: OCEANS 2025 Great Lakes conference - SCCOOS relevant presentations: The Ongoing Evolution of Ocean Observing Systems: Aligning with Regional Priorities presentation and New Horizons in Blue Tech: Bridging Knowledge and Innovation. Chicago, IL.
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Oct 1-8: San Diego Climate Week
- Oct. 4: Family-friendly marine science celebration event - Walter Munk Day, La Jolla, CA, SCCOOS will be hosting a booth and activity
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Oct 8-10: National Association of Marine Labs Biennial Meeting, Moss Landing, CA
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Oct. 16-24: International Conference on Harmful Algae, Punta Arenas, Chile - Clarissa Anderson presenting
- Oct. 29-31: SCOR Annual Meeting - Clarissa Anderson presenting
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Nov 16-20: SETAC North America 46th Annual Meeting, Portland, OR - SCCOOS poster
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Nov 2025: BlueTech Month, San Diego Events Nov 13-20 - SCCOOS will be hosting a booth on Nov. 15
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