Saving Seafood

Temperature corrections boost accuracy of coastal ocean color satellites

October 20, 2025 — Ocean color satellites provide essential insights into water quality and ecosystem dynamics by estimating chlorophyll, suspended matter, and dissolved organic material. Atmospheric correction, the process of removing scattering and absorption from satellite signals, is central to these analyses.

Traditional algorithms assume that near-infrared signals from seawater are negligible, a simplification that often fails in turbid coastal regions. Compounding this issue, most models treat seawater absorption as constant, overlooking natural variability driven by temperature shifts. Such oversights can distort data products used for fisheries, pollution tracking, and climate studies. Due to these problems, there is a pressing need for algorithms that explicitly account for environmental variability.

Researchers from the Ocean University of China and collaborators report a major step forward in remote sensing accuracy in the Journal of Remote Sensing. Their study introduces ACiter-T, an upgraded atmospheric correction algorithm that incorporates seawater temperature effects into satellite processing.

Read the full article at PHYS.org

Dong Shuanglin: China’s marine ranches represent new approach to aquaculture

June 14, 2021 — China has rolled out a national policy with a new approach toward aquaculture, according to a leading Chinese researcher in the field.

Dong Shuanglin, a professor at the Key Laboratory of Mariculture at the Ocean University of China in Qingdao, has spent much of his career researching mariculture along the coast of Shandong Province, currently an area of focus for numerous companies seeking to develop mariculture initiatives in China. He said such efforts are now being guided by China’s National Marine Ranch Demonstration Area Construction Plan, implemented by the Ministry of Agriculture and Rural Affairs, which has prioritized the construction of large-scale, integrated multitrophic systems, many of which include leisure facilities.

Read the full story at Seafood Source

The Ocean’s Swirling Currents Are Migrating Poleward

March 2, 2020 — Enormous, swirling gyres compose some of the world’s biggest and most important ocean currents. Found in the North and South Pacific, the North and South Atlantic, and the Indian Ocean, these massive, rotating currents help transport heat and nutrients around the globe.

Now, new research suggests, they seem to be on the move.

A recent study, conducted by scientists from the Alfred Wegener Institute in Germany and the Ocean University of China, finds major ocean gyres are steadily creeping toward the poles. Since the 1980s, they’ve been migrating by about a half mile each year.

It’s already causing noticeable consequences, the researchers suggest.

For one thing, ocean gyres tend to alter the sea levels around them. Scientists have already observed a distinct band of higher-than-average sea levels in the midlatitudes, including along much of the U.S. East Coast—a phenomenon some experts have chalked up to regional warming patterns and related changes in the structure of the ocean. But the new study suggests the movement of ocean gyres may also be playing a role.

Gyres also help control the flow of heat and nutrients through the ocean. As they move, they can alter ocean ecosystems, affect certain fisheries and influence weather patterns. The study suggests the movement of gyres may already be linked to recent observed changes in the movement of hurricanes and the behavior of major atmospheric currents, like the jet streams.

Read the full story from E&E News at Scientific American