Oceanography – Page 2 – PossibleThreat Articles

New tool enables Nova Scotia lobster fishery to address impacts of climate change

October 11, 2019 0 Comments Climate, Environmental Awareness, Fish, Fisheries, Global Warming, Marine Biology, Nature, Oceanography

Researchers use long-term survey data sets and climate models to help fishing communities plan for a warmer ocean. Researchers have developed a tool that incorporates projected changes in ocean climate onto a geographic fishery management area. Now fishermen, resource managers, and policy-makers can use it to plan for the future sustainability of the lobster fishery in Nova Scotia and Canadian waters of the Gulf of Maine.

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Solution to Ice Age ocean chemistry puzzle

October 10, 2019 0 Comments Ancient DNA, Climate, Early Climate, Evolution, Fish, Global Warming, Marine Biology, Nature, Oceanography

New research into the chemistry of the oceans during ice ages is helping to solve a puzzle that has engaged scientists for more than two decades. At issue is how much of the CO2 that entered the ocean during ice ages can be attributed to the 'biological pump', where atmospheric carbon is absorbed by phytoplankton and sequestered to the seafloor as organisms die and sink.

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Warm ocean water attacking edges of Antarctica's ice shelves

October 10, 2019 0 Comments Climate, Ecosystems, Geography, Global Warming, Ice Ages, Oceanography, Snow and Avalanches, Water

Upside-down 'rivers' of warm ocean water are eroding the fractured edges of thick, floating Antarctic ice shelves from below, helping to create conditions that lead to ice-shelf breakup and sea-level rise, according to a new study. The findings describe a new process important to the future of Antarctica's ice and the continent's contribution to rising seas. Models and forecasts do not yet account for the newly understood and troubling scenario, which is already underway.

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The deeper these octopuses live, the wartier their skin

October 8, 2019 0 Comments Ecology, Environmental Awareness, Fish, Geography, Marine Biology, Nature, New Species, Oceanography

Deep beneath the ocean's surface, surprisingly cute pink octopuses creep along the seafloor. Some of them have super warty skin, and some are smooth. Scientists weren't sure if these octopuses were even members of the same species, and they didn't know how to explain the differences in the animals' looks. But a new study shows that the deeper in the ocean the octopuses live, the bumpier their skin and the smaller their bodies.

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New method gives first global picture of mutual predictability of atmosphere and ocean

October 7, 2019 0 Comments Atmosphere, Climate, Environmental Awareness, Environmental Issues, Geography, Global Warming, Oceanography, Weather

Scientists have carried out a novel statistical analysis to determine for the first time a global picture of how the ocean helps predict the low-level atmosphere and vice versa. They observed ubiquitous influence of the ocean on the atmosphere in the extratropics, which has been difficult to demonstrate with dynamic models of atmospheric and oceanic circulation.

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Disappearing Peruvian glaciers

October 7, 2019 0 Comments Climate, Drought Research, Floods, Global Warming, Ice Ages, Oceanography, Snow and Avalanches, Water

It is common knowledge that glaciers are melting in most areas across the globe. The speed at which tropical glaciers in the Peruvian Andes are retreating is particularly alarming, however. In the first detailed investigation of all Peruvian mountain ranges, a research team has ascertained a drastic reduction of almost 30 percent in the area covered by glaciers between 2000 and 2016.

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Proximity to paths and roads is a burden for white-tailed sea eagles

October 7, 2019 0 Comments El Nino and La Nina, Endangered Animals, Fish, Fisheries, Geography, Global Warming, Marine Biology, Oceanography

A research team has now measured concentrations of the hormone corticosterone and its metabolic products in white-tailed sea eagles in northern Germany and correlated these values with potential causes of stress. They found that the levels of corticosterone in the birds' urine are higher the closer a breeding pair's nest is to paths or roads.

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Laser precision: NASA flights, satellite align over sea ice

October 3, 2019 0 Comments Climate, Global Warming, Ice Ages, Moon, NASA, Oceanography, Satellites, Uranus

The skies were clear, the winds were low, and the lasers aligned. In April, instruments aboard NASA's Operation IceBridge airborne campaign and the Ice, Cloud and Land Elevation Satellite-2 succeeded in measuring the same Arctic sea ice at the same time, a tricky feat given the shifting sea ice.

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Safeguarding the world's largest tuna fishery

October 2, 2019 0 Comments Ecology, Fish, Fisheries, Geography, Global Warming, Nature, Oceanography, Sea Life

New research has used a combination of records from captains and scientific observers, FAD tracking data, ocean models and cutting edge simulation methods to reveal for the first time the trajectories and potential impact FADs may have on fisheries around Pacific island nations.

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Technology provides insight into how white sharks hunt

October 2, 2019 0 Comments Caving, Ecology, Fish, Geography, Marine Biology, Oceanography, Sea Life, Wild Animals

White sharks are top predators in the marine environment, but unlike their terrestrial counterparts, very little is known about their predatory activity underwater, with current knowledge limited to surface predation events. Now, a team of international scientists has used video- and data-logging technology to shed new light on predator-prey interactions of these mighty sea creatures.