A large marine heatwave has bathed parts of the West Coast in very warm ocean waters over the past year, breaking temperature records in the Pacific. NOAA has also announced that El Niño has developed in the tropical Pacific and is predicted to intensify to a moderate or strong level this fall. El Niño represents another form of marine warming , though with different drivers and influences. The prolonged period of high temperatures could affect fisheries and marine life in the California Current that have already been buffeted by shifting ocean conditions over the last decade.

Okayama University of Science and Murakami City, Niigata Prefecture, have launched a joint research project to establish the world’s first fully closed-cycle land-based aquaculture system for chum salmon (Oncorhynchus keta) using the university’s proprietary “Third Water” technology. The project aims to address the dramatic decline in salmon returns caused by climate change and changing marine ecosystems. More than 2,000 juvenile salmon are currently being reared in a 35-ton closed recirculation aquaculture system at the university’s Next-Generation Aquaculture Center. Researchers expect the fish to reach market size within one to two years. If successful, the project could provide a sustainable alternative to ocean-dependent salmon production and contribute to the long-term resilience of salmon fisheries in Japan and worldwide.

The valence state of iron in majorite, a major mineral in the deep interiors of Earth and Mars, was determined using high-pressure experiments and X-ray Absorption Near Edge Structure (XANES) analysis. The results show that majorite contains moderate amounts of Fe³⁺, suggesting that it may have played an important role in controlling the oxidation state of planetary mantles and in the formation of oxidized magmas near the surface after planetary formation.

In a new study, researchers have directly confirmed for the first time that water from melting snow and ice, or meltwater, found at the surface of a glacier can drain down to its base, causing the glaciers in Antarctica to speed up and move towards the ocean. 

The first published live observations of the rare goblin shark (Mitsukurina owstoni) in its natural deep ocean habitat were reported in a new paper by a University of Hawai‘i at Mānoa-led team of oceanographers. In the past, goblin sharks were only filmed and reported alive after being hooked on a fishing line and hauled to the surface, where divers could observe them and where they soon died. The new study, published in Journal of Fish Biology, documents two live observations of one of the most elusive but iconic sharks on the planet—one at a seamount near Jarvis Island and another on the slope of the Tonga Trench.