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Categories: Geoscience: Oceanography

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Geoscience: Earth Science Geoscience: Geography Geoscience: Geology Geoscience: Oceanography Paleontology: Fossils Paleontology: General
Published

Rock solid evidence: Angola geology reveals prehistoric split between South America and Africa      (via sciencedaily.com)     Original source 

A research team has found that ancient rocks and fossils from long-extinct marine reptiles in Angola clearly show a key part of Earth's past -- the splitting of South America and Africa and the subsequent formation of the South Atlantic Ocean.

Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Feedback loop that is melting ice shelves in West Antarctica revealed      (via sciencedaily.com)     Original source 

New research has uncovered a feedback loop that may be accelerating the melting of the floating portions of the West Antarctic Ice Sheet, pushing up global sea levels. The study sheds new light on the mechanisms driving the melting of ice shelves beneath the surface of the ocean, which have been unclear until now.

Biology: Biochemistry Biology: General Biology: Marine Ecology: Sea Life Environmental: Ecosystems Environmental: Water Geoscience: Oceanography
Published

Surf clams off the coast of Virginia reappear -- and rebound      (via sciencedaily.com)     Original source 

The Atlantic surfclam, an economically valuable species that is the main ingredient in clam chowder and fried clam strips, has returned to Virginia waters in a big way, reversing a die-off that started more than two decades ago. In a comprehensive study of surfclams collected from an area about 45 miles due east from the mouth of the Chesapeake Bay, scientists found the population to be thriving and growing.

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

Warming of Antarctic deep-sea waters contribute to sea level rise in North Atlantic, study finds      (via sciencedaily.com)     Original source 

Analysis of mooring observations and hydrographic data suggest the Atlantic Meridional Overturning Circulation deep water limb in the North Atlantic has weakened. Two decades of continual observations provide a greater understanding of the Earth's climate regulating system.

Environmental: General Environmental: Water Geoscience: Geography Geoscience: Geology Geoscience: Oceanography
Published

One third of China's urban population at risk of city sinking, new satellite data shows      (via sciencedaily.com)     Original source 

Land subsidence is overlooked as a hazard in cities, according to new research. Scientists used satellite data that accurately and consistently maps land movement across China.

Biology: Biochemistry Biology: Biotechnology Biology: Cell Biology Biology: Evolutionary Biology: General Biology: Genetics Biology: Marine Biology: Microbiology Biology: Zoology Ecology: General Ecology: Nature Ecology: Research Ecology: Sea Life Environmental: Biodiversity Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Marine microbial populations: Potential sensors of the global change in the ocean      (via sciencedaily.com)     Original source 

Animal and plant populations have been extensively studied, which has helped to understand ecosystem processes and evolutionary adaptations. However, this has not been the case with microbial populations due to the impossibility of isolating, culturing and analyzing the genetic content of the different species and their individuals in the laboratory. Therefore, although it is known that populations of microorganisms include a great diversity, this remains largely uncharacterized.

Environmental: General Geoscience: Earth Science Geoscience: Environmental Issues Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography Geoscience: Severe Weather Paleontology: Climate Paleontology: General
Published

Ice age climate analysis reduces worst-case warming expected from rising CO2      (via sciencedaily.com)     Original source 

A detailed reconstruction of climate during the most recent ice age, when a large swath of North America was covered in ice, provides information on the relationship between CO2 and global temperature. Results show that while most future warming estimates remain unchanged, the absolute worst-case scenario is unlikely.

Biology: Marine Biology: Zoology Ecology: Sea Life Environmental: Water Geoscience: Geochemistry Geoscience: Geography Geoscience: Oceanography
Published

Huge database gives insight into salmon patterns at sea      (via sciencedaily.com)     Original source 

A massive new analysis of high seas salmon surveys is enhancing the understanding of salmon ecology, adding details about where various species congregate in the North Pacific Ocean and their different temperature tolerances. The project integrates numerous international salmon studies from the North Pacific dating back to the 1950s.

Biology: Biochemistry Biology: Cell Biology Biology: General Biology: Marine Biology: Zoology Chemistry: Biochemistry Ecology: Animals Ecology: Endangered Species Ecology: Invasive Species Ecology: Nature Ecology: Sea Life Environmental: General Geoscience: Oceanography
Published

New tagging method provides bioadhesive interface for marine sensors on diverse, soft, and fragile species      (via sciencedaily.com)     Original source 

Tagging marine animals with sensors to track their movements and ocean conditions can provide important environmental and behavioral information. Existing techniques to attach sensors currently largely rely on invasive physical anchors, suction cups, and rigid glues. While these techniques can be effective for tracking marine animals with hard exoskeletons and large animals such as sharks, individuals can incur physiological and metabolic stress during the tagging process, which can affect the quality of data collection. A newly developed soft hydrogel-based bioadhesive interface for marine sensors, referred to as BIMS, holds promise as an effective, rapid, robust, and non-invasive method to tag and track all sorts of marine species, including soft and fragile species. The BIMS tagging, which is also simple and versatile, can help researchers better understand animal behavior while also capturing oceanographic data critical for helping to better understand some impacts of climate change and for resource management.

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

Hidden threat: Global underground infrastructure vulnerable to sea-level rise      (via sciencedaily.com)     Original source 

As sea levels rise, coastal groundwater is lifted closer to the ground surface while also becoming saltier and more corrosive. A recent study compiled research from experts worldwide showing that in cities where there are complex networks of buried and partially buried infrastructure, interaction with this shallower and saltier groundwater exacerbates corrosion and failure of critical systems such as sewer lines, roadways, and building foundations.

Biology: General Biology: Marine Ecology: Endangered Species Ecology: General Ecology: Nature Ecology: Research Ecology: Sea Life Geoscience: Geography Geoscience: Oceanography
Published

Where have all the right whales gone?      (via sciencedaily.com)     Original source 

Marine researchers have mapped the density of one of the most endangered large whale species worldwide, the North Atlantic right whale, using new data to help avoid right whales' harmful exposure to commercial fisheries and vessel strikes. The resulting maps, spanning 20 years of whale observations, are publicly available to inform risk assessments, estimations of whale harm/disturbance, marine spatial planning, and industry regulations to mitigate risk to right whales.

Biology: Marine Ecology: Sea Life Environmental: Water Geoscience: Geography Geoscience: Oceanography
Published

Oceanographers uncover the vital role of mixing down of oxygen in sustaining deep sea health      (via sciencedaily.com)     Original source 

Oceanographers have shown for the first time the important role of the 'mixing down' of oxygen in maintaining healthy conditions in the deep waters.

Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Ocean currents threaten to collapse Antarctic ice shelves      (via sciencedaily.com)     Original source 

Meandering ocean currents play an important role in the melting of Antarctic ice shelves, threatening a significant rise in sea levels.

Biology: General Biology: Marine Biology: Microbiology Biology: Zoology Ecology: Invasive Species Ecology: Nature Ecology: Sea Life Environmental: General Geoscience: Environmental Issues Geoscience: Oceanography
Published

Cold-affinity algae species are gradually being replaced by warm-affinity ones off the coast of Biscay      (via sciencedaily.com)     Original source 

A study has analyzed the impact of the rise in sea surface temperature on macroalgae communities over the last four decades. Points at various depths were investigated in a location off the coast of Biscay, and an increasing scarcity was observed in the number of cold-affinity structuring species, while small warm-affinity ones have proliferated. The researchers are warning that some ecological functions are in jeopardy as a result.

Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Tiny plastic particles are found everywhere      (via sciencedaily.com)     Original source 

Microplastic particles can be found in the most remote ocean regions on earth. In Antarctica, pollution levels are even higher than previously assumed.

Biology: Biochemistry Biology: General Biology: Marine Biology: Zoology Ecology: General Ecology: Nature Ecology: Research Ecology: Sea Life Environmental: Ecosystems Environmental: General Geoscience: Environmental Issues Geoscience: Geography Geoscience: Oceanography
Published

Impact of climate change on marine life much bigger than previously known      (via sciencedaily.com)     Original source 

Fish and invertebrate animals are far more affected by warmer and more acidic seawater than was previously known. The big gain of the new method is that more details become known about effects of climate change on species.

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

A natural touch for coastal defense      (via sciencedaily.com)     Original source 

Common 'hard' coastal defenses, like concrete sea walls, might struggle to keep up with increasing climate risks. A new study shows that combining them with nature-based solutions could, in some contexts, create defenses which are better able to adapt.