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Categories: Geoscience: Oceanography

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Biology: Biochemistry Ecology: Extinction Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Oceanography
Published

3D models provide unprecedented look at corals' response to bleaching events      (via sciencedaily.com)     Original source 

Marine biologists are providing a glimpse into coral 'bleaching' responses to stress, using imaging technology to pinpoint coral survival rates following multiple bleaching events off the island of Maui. Using a time series of coral reef 3D models from Maui, the researchers tracked the bleaching response of 1,832 coral colonies from 2014 to 2021. The seven-year data set provided detailed imagery of the reefs year-by-year, allowing the team to identify patterns of coral growth and survivorship through sequential bleaching events that occurred in 2015 and 2019.

Archaeology: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography Paleontology: Climate
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Underwater mapping reveals new insights into melting of Antarctica's ice shelves      (via sciencedaily.com)     Original source 

Clues to future sea level rise have been revealed by the first detailed maps of the underside of a floating ice shelf in Antarctica. An international research team deployed an unmanned submersible beneath the Dotson Ice Shelf in West Antarctica.

Environmental: Water Geoscience: Oceanography
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Barriers designed to prevent saltwater intrusion may worsen inland flooding      (via sciencedaily.com)     Original source 

Building protection barriers without accounting for potential inland flooding risks from groundwater can eventually worsen the very issues they aim to solve.

Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography
Published

What's the weather like in the deep sea?      (via sciencedaily.com)     Original source 

A new study has revealed how even the deepest seafloors are affected by the daily back-and-forth of the tides, and the change of the seasons, and that currents at the bottom of the ocean are far more complicated than previously thought. These findings are helping us understand the deep-sea pathways of nutrients that support important deep-sea ecosystems, assess where microplastics and other pollutants accumulate in the ocean, and reconstruct past climate change.

Geoscience: Earth Science Geoscience: Geology Geoscience: Oceanography Geoscience: Volcanoes
Published

Recent volcanic 'fires' in Iceland triggered by storage and melting in crust      (via sciencedaily.com)     Original source 

Scientists have detected geochemical signatures of magma pooling and melting beneath the subsurface during the 'Fagradalsfjall Fires', that began on Iceland's Reykjanes peninsula in 2021. Samples show that the start of the eruption began with massive pooling of magma, contrasting initial hypothesis for magma ascent straight from the mantle.

Biology: Biochemistry Biology: General Biology: Zoology Chemistry: Biochemistry Ecology: Nature Environmental: Biodiversity Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

North Sea oil and gas extraction spikes pollution by 10,000 percent, study finds      (via sciencedaily.com)     Original source 

North Sea oil and gas extraction can cause pollution to spike by more than 10,000 percent within half a kilometer around off-shore sites, a study has found. The research has uncovered the true impact on Britain's seabed life -- with the number of species plummeting nearly 30 percent near platforms.

Environmental: General Environmental: Water Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography Geoscience: Severe Weather
Published

How Saharan dust regulates hurricane rainfall      (via sciencedaily.com)     Original source 

New research underscores the close relationship between dust plumes transported from the Sahara Desert in Africa, and rainfall from tropical cyclones along the U.S. Gulf Coast and Florida.

Environmental: General Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Southern Ocean absorbing more carbon dioxide than previously thought, study finds      (via sciencedaily.com)     Original source 

New research has found that the Southern Ocean absorbs more carbon dioxide (CO2) than previously thought. Using direct measurements of CO2 exchange, or fluxes, between the air and sea, the scientists found the ocean around Antarctica absorbs 25% more CO2 than previous indirect estimates based on shipboard data have suggested.

Biology: Biochemistry Biology: Zoology Ecology: Endangered Species Environmental: Water Geoscience: Oceanography
Published

Researchers record images and data of a shark experiencing a boat strike      (via sciencedaily.com)     Original source 

Researchers have captured what they believe is the first ever video of a shark or any large marine animal being struck by a boat.

Ecology: Endangered Species Geoscience: Geography Geoscience: Oceanography Offbeat: Earth and Climate Offbeat: General Offbeat: Plants and Animals
Published

Whale shark tracked for record-breaking four years      (via sciencedaily.com)     Original source 

Researchers have been tracking a 26-foot endangered whale shark -- named 'Rio Lady' -- with a satellite transmitter for more than four years -- a record for whale sharks and one of the longest tracking endeavors for any species of shark.

Ecology: Nature Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
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Ecologists discover rare fiddler crab species on Hong Kong coast highlighting the impact of climate change and coastal development      (via sciencedaily.com)     Original source 

Researchers have made an exciting discovery on the Hong Kong coast. They have identified two fiddler crab species: Tubuca dussumieri, previously recorded in old literature but never confirmed in recent times, and Tubuca. coarctata, which has never been seen in Hong Kong. These findings not only confirm the presence of these insular species in Hong Kong but also explore the potential impact of climate change on their distribution.

Environmental: General Geoscience: Earth Science Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography
Published

Deep-ocean floor produces its own oxygen      (via sciencedaily.com)     Original source 

An international team of researchers has discovered that metallic minerals on the deep-ocean floor produce oxygen -- 13,000 feet below the surface. Discovery challenges long-held assumptions that only photosynthetic organisms generate Earth's oxygen. Minerals at the abyssal seafloor appear to act like geobatteries to produce oxygen in a process that does not require sunlight.

Environmental: Ecosystems Environmental: General Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
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Sea ice's cooling power is waning faster than its area of extent      (via sciencedaily.com)     Original source 

As sea ice disappears and grows less reflective, the Arctic has lost around a quarter of its cooling power since 1980, and the world has lost up to 15%, according to new research.

Biology: Botany Biology: Marine Biology: Microbiology Ecology: General Ecology: Research Ecology: Sea Life Environmental: Ecosystems Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography
Published

Reef pest feasts on 'sea sawdust'      (via sciencedaily.com)     Original source 

Researchers have uncovered an under the sea phenomenon where coral-destroying crown-of-thorns starfish larvae have been feasting on blue-green algae bacteria known as 'sea sawdust'.

Biology: General Biology: Marine Biology: Microbiology Ecology: Nature Environmental: General Environmental: Water Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography
Published

Diatom surprise could rewrite the global carbon cycle      (via sciencedaily.com)     Original source 

When it comes to diatoms that live in the ocean, new research suggests that photosynthesis is not the only strategy for accumulating carbon. Instead, these single-celled plankton are also building biomass by feeding directly on organic carbon in wide swaths of the ocean. These new findings could lead to reduced estimates regarding how much carbon dioxide diatoms pull out of the air via photosynthesis, which in turn, could alter our understanding of the global carbon cycle, which is especially relevant given the changing climate.

Environmental: General Environmental: Water Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
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Microplastic pollution increases sea foam height and stability      (via sciencedaily.com)     Original source 

Researchers examine the specific impacts of microplastics on the geophysics of sea foam formation in the critical zone where water meets air in the top layer of the ocean. They devised two simulations for their work -- a column filled with sea water injected with air and a laboratory-scale breaking wave channel to test the impacts of wave height on sea foam in the surface microlayer -- and tested their effects on sea foam formation, stability, and duration.

Environmental: General Environmental: Water Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geochemistry Geoscience: Oceanography
Published

High and low tide cause low and high methane fluxes      (via sciencedaily.com)     Original source 

Methane, a strong greenhouse gas that naturally escapes from the bottom of the North Sea, is affected by the pressure of high or low tide. Methane emissions from the seafloor can be just easily three times as much or as little, depending on the tide, according to a new study.

Environmental: Ecosystems Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
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Scientists call for 'major initiative' to study whether geoengineering should be used on glaciers      (via sciencedaily.com)     Original source 

Scientists have released a landmark report on glacial geoengineering -- an emerging field studying whether technology could halt the melting of glaciers and ice sheets as climate change progresses.