Current Seafloor News and Events | Page 4

Current Seafloor News and Events, Seafloor News Articles.
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Pulses of sinking carbon reaching the deep sea are not captured in global climate models
A new study by MBARI scientists shows that pulses of sinking debris carry large amounts of carbon to the deep seafloor, but are poorly represented in global climate models. (2018-12-03)

New study reveals connection between climate, life and the movement of continents
A new study by The University of Texas at Austin has demonstrated a possible link between life on Earth and the movement of continents. The findings show that sediment, which is often comprised from pieces of dead organisms, could play a key role in determining the speed of continental drift. (2018-11-15)

Alterations to seabed raise fears for future
The ocean floor as we know it is dissolving rapidly as a result of human activity. The seabed plays a crucial role in controlling the degree of ocean acidification by neutralizing the acidity of the water. But due to human activities, the level of CO2 in the water is so high, and the water so acidic, that the calcite on the ocean floor is simply being dissolved. (2018-10-29)

GeoSEA array records sliding of Mount Etna's southeastern flank
The southeast flank of Mount Etna slowly slides towards the sea. A team of scientists from GEOMAR and the Kiel University showed for the first time movement of Etna's underwater flank using a new, sound-based geodetic monitoring network. A sudden and rapid descent of the entire slope could lead to a tsunami with disastrous effects for the entire region. The results have been published today in the international journal Science Advances. (2018-10-10)

High-res data offer most detailed look yet at trawl fishing footprint around the world
A new analysis that uses high-resolution data for 24 ocean regions in Africa, Europe, North and South America and Australasia shows that 14 percent of the overall seafloor shallower than 1,000 meters (3,280 feet) is trawled. The analysis shows that the footprint of bottom-trawl fishing on continental shelves and slopes across the world's oceans often has been substantially overestimated. (2018-10-08)

'Turbidity currents' are not just currents, but involve movement of the seafloor itself
A new paper shows that turbidity currents in submarine canyons often involve large-scale movement of the seafloor. This discovery could help ocean engineers avoid damage to pipelines, communications cables, and other seafloor structures. (2018-10-05)

Observing the development of a deep-sea greenhouse gas filter
In a long-term study, marine scientists from Bremen for the first time observed the colonization of a deep-sea mud volcano after its eruption. Only slowly, rich life develops around the crater. The first settlers are tiny organisms that eat methane escaping from the volcano. Thereby, they keep this greenhouse gas from reaching the atmosphere. The present study describes how the colonization of the mud volcano proceeds and when the tiny methane-munchers get going. (2018-09-28)

Retracing Antarctica's glacial past
More than 26,000 years ago, sea level was much lower than it is today partly because the ice sheets that jut out from the continent of Antarctica were enormous and covered by grounded ice -- ice that was fully attached to the seafloor. As the planet warmed, the ice sheets melted and contracted, and sea level began to rise. LSU Department of Geology & Geophysics Associate Professor Phil Bart and his students have discovered new information that illuminates how and when this global phenomenon occurred. (2018-09-25)

Glacial engineering could limit sea-level rise, if we get our emissions under control
Targeted engineering projects to hold off glacier melting could slow down ice-sheet collapse and limit sea-level rise, according to a new The Cryosphere study. While an intervention similar in size to existing large civil engineering projects could only have a 30 percent chance of success, a larger project would have better odds of holding off ice-sheet collapse. But the researchers caution that reducing emissions still remains key to stopping climate change and its dramatic effects. (2018-09-20)

Three new species of fish discovered in the extreme depths of the Pacific Ocean
An exploration to one of the deepest places on earth has captured rare footage of what is believed to be three new species of the elusive Snailfish. (2018-09-10)

Understanding deep-sea images with artificial intelligence
More and more data and images are generated during ocean research. In order to be able to evaluate the image data scientifically, automated procedures are necessary. Together with GEOMAR data management, researchers at GEOMAR have now developed a standardized workflow for sustainable marine image analysis for the first time and recently published it in the international journal Scientific Data. Dr. Timm Schoening, lead author, will present these and other methods of digitisation in marine research at the Digital Week in Kiel. (2018-09-10)

Artificial intelligence guides rapid data-driven exploration of underwater habitats
Researchers aboard Schmidt Ocean Institute's research vessel Falkor used autonomous underwater robots, along with the Institute's remotely operated vehicle (ROV) SuBastian, to acquire 1.3 million high resolution images of the seafloor at Hydrate Ridge, composing them into the largest known high resolution color 3D model of the seafloor. Using unsupervised clustering algorithms, they identified dynamic biological hotspots in the image data for more detailed surveys and sampling by a remotely operated vehicle. (2018-08-29)

What makes diamonds blue? Boron from oceanic crustal remnants in Earth's lower mantle
Blue diamonds -- like the world-famous Hope Diamond at the National Museum of Natural History -- formed up to four times deeper in the Earth's mantle than most other diamonds, according to new work published on the cover of Nature. (2018-08-01)

Strategy for 'No-Mining Zones' in the Deep Sea
An international team of researchers has developed a comprehensive set of criteria to help the International Seabed Authority (ISA) protect local biodiversity from deep-sea mining activities. These guidelines should help identify areas of particular environmental importance where no mining should occur. The new ecological framework is a set of 18 quantitative metrics to assess whether the number, shapes, sizes and locations of proposed zones will be sufficient to protect threatened habitats and species. (2018-07-10)

New study: Oxygen loss in the coastal Baltic Sea is 'unprecedentedly severe'
The Baltic Sea is home to some of the world's largest dead zones, areas of oxygen-starved waters where most marine animals can't survive. But while parts of this sea have long suffered from low oxygen levels, a new study by a team in Finland and Germany shows that oxygen loss in coastal areas over the past century is unprecedented in the last 1,500 years. The research is published today in the European Geosciences Union journal Biogeosciences. (2018-07-05)

Reconstruction of Grand Banks event sheds light on geohazard threats to seafloor infrastructure
As part of an international team, a researcher from the University of Liverpool reconstructed the 1929 Grand Banks underwater avalanche to better understand these common geohazards, which threaten critical seafloor infrastructure. (2018-07-05)

World's first animals caused global warming
The evolution of Earth's first animals more than 500 million years ago caused global warming, new research shows. (2018-07-02)

Major study reveals Great Barrier Reef's 30,000-year fight for survival
A landmark international study, recently published in Nature Geoscience, shows that the Great Barrier Reef has suffered 5 death events in the last 30,000 years. The groundbreaking study of the world's largest reef system, involving the participation of Juan Carlos Braga Alarcón, a Full Professor at the UGR's Department of Stratigraphy and Palaeontology, reveals that these events were driven mostly by variations in sea level and associated environmental changes. (2018-06-28)

Scientists use hydrophone to listen in on methane seeps in ocean
A research team has successfully recorded the sound of methane bubbles from the seafloor off the Oregon coast, opening the door to using acoustics to identify -- and perhaps quantify -- this important greenhouse gas in the ocean. (2018-06-26)

Why the tongue of the Pine Island Glacier suddenly shrank
The Pine Island Glacier in Western Antarctica is not only one of the fastest-flowing ice streams in the Southern Hemisphere; over the past 11 years, four major icebergs have calved from its floating tongue. (2018-06-15)

Undersea fiber optics: A new way to detect quakes
Monitoring earthquake-induced changes in fiber optic cables on the ocean floor represents a new way to detect quakes, researchers say. (2018-06-14)

Shrinking ice sheet made a surprising comeback
The ice sheets near earth's poles have been constantly shrinking for the past 20,000 years. At least, that's what scientists used to think. But according to a study published today in Nature, the West Antarctic Ice Sheet has regrown in recent history -- and the process was driven by its own shrinking. (2018-06-13)

Research provides insights on World War II naval battle site
A new International Journal of Nautical Archaeology study provides precise geographic information for the preservation, long-term research, and future use of a historically important World War II battle site on the seafloor off the coast of Okinawa, Japan. (2018-06-12)

Fueling a deep-sea ecosystem
Miles beneath the ocean's surface in the dark abyss, vast communities of subseafloor microbes at deep-sea hot springs are converting chemicals into energy that allows deep-sea life to survive -- and even thrive -- in a world without sunlight. Until now, however, measuring the productivity of subseafloor microbe communities -- or how fast they oxidize chemicals and the amount of carbon they produce -- has been nearly impossible. (2018-06-11)

Life recovered rapidly at impact site of dino-killing asteroid
New research led by the University of Texas at Austin finds that life rebounded in the crater left by the asteroid that killed the dinosaurs much faster than previously thought. Sea life was present a few years after the impact and a thriving ecosystem within 30,000 years. (2018-05-30)

OSU, NOAA researchers document widespread methane seeps off Oregon coast
For the past two years, scientists from Oregon State University and the National Oceanic and Atmospheric Administration (NOAA) have surveyed the Pacific Northwest near-shore region mapping sites where underwater bubble streams signify methane gas is being released from the seafloor. (2018-05-30)

Cold production of new seafloor
Magma steadily emerges between oceanic plates. It pushes the plates apart, builds large underwater mountains and forms new seafloor. This is one of the fundamental processes that constantly change the face of the Earth. But there are also times when new seabed is created without any volcanism, by un-roofing mantle material directly at the seafloor. Scientists led by GEOMAR, Germany have published the first estimation based on seismic data on how much seafloor is produced this way. (2018-05-24)

The gypsum gravity chute: A phytoplankton-elevator to the ocean floor
Tiny gypsum crystals can make phytoplankton so heavy that they rapidly sink, hereby transporting large quantities of carbon to the ocean's depths. (2018-05-22)

UNM scientists find widespread ocean anoxia as cause for past mass extinction
For decades, scientists have conducted research centered around the five major mass extinctions that have shaped the world we live in. The extinctions date back more than 450 million years with the Late Ordovician Mass Extinction to the deadliest extinction, the Late Permian extinction 250 million years ago that wiped out over 90 percent of species. (2018-05-21)

How large can a tsunami be in the Caribbean?
The 2004 Indian Ocean tsunami has researchers reevaluating whether a magnitude 9.0 megathrust earthquake and resulting tsunami might also be a likely risk for the Caribbean region, seismologists reported at the SSA 2018 Annual Meeting. (2018-05-16)

Effects of munitions in the seas only partially known
More than 70 years after the end of World War II, countless pieces of ammunition from this time are still lying in all oceans. Once the casings are damaged, the explosives can release toxic substances into the seawater. A new review study, published by scientists from the GEOMAR Helmholtz Centre for Ocean Research Kiel and the Schleswig-Holstein Ministry of the Environment points to considerable knowledge gaps regarding the spread and effects of these chemicals on marine ecosystems. (2018-04-30)

Reversal of fortunes
Scientists have discovered that the seafloor from the Mississippi River Delta to the Gulf of Mexico is eroding like the land loss that is occurring on the Louisiana coast. This research was published recently in the journal Marine Geology. (2018-04-03)

Earth's stable temperature past suggests other planets could also sustain life
Research about temperatures on the early Earth have ranged from a virtually ice-covered surface to a very hot planet that could not support most of today's lifeforms. New computer simulations show fairly moderate average temperatures and more stable ocean pH -- which helps explain how life evolved here, and might emerge on other planets. (2018-04-02)

Evidence for a giant flood in the central Mediterranean Sea
Marine scientists have uncovered evidence of one of the largest floods in Earth's history in the central Mediterranean seafloor. The flood, known as the Zanclean flood, is thought to have ended the Messinian Salinity Crisis (MSC), a period during which the Mediterranean Sea became partially dried up. (2018-03-21)

Mexico's 2017 earthquake emerged from a growing risk zone
Under Mexico, where the Cocos Plate from the Pacific Ocean slides under the North American Plate, a bending line of hills, created when the seafloor first formed, sits atop a flattened area of subduction. That newly recognized combination, scientists report, has created a fault that likely explains last September's Puebla earthquake, scientists report. (2018-03-12)

Oil-eating microbes are challenged in the Arctic
Bacteria play a major role in cleaning up oil spills and mitigating its environmental impacts. In a review published in Science of the Total Environment, researchers from Aarhus University, Denmark, examine the major limiting factors for microbial degradation in Arctic environments. (2018-02-20)

Stable gas hydrates can trigger landslides
Like avalanches onshore, there are different processes that cause submarine landslides. One very widespread assumption is that they are associated with dissociating gas hydrates in the seafloor. However, scientists at GEOMAR Helmholtz Centre for Ocean Research Kiel have now found evidence that the context could be quite different. Their study has been published in the international journal Nature Communications. (2018-02-20)

Geophysicists and atmospheric scientists partner to track typhoons' seismic footprints
A remarkable collaboration between atmospheric science and geophysics could change the way we think about storms and seismicity, and could lead to an answer to the often-asked 'Are hurricanes getting stronger?' Princeton University's Lucia Gualtieri and Salvatore Pascale led an international team that has identified the seismic footprint of typhoons and hurricanes, which allows climate scientists to add decades to their dataset of powerful storms. (2018-02-15)

How seafloor weathering drives the slow carbon cycle
A previously unknown connection between geological atmospheric carbon dioxide cycles and the fluctuating capacity of the ocean crust to store carbon dioxide has been uncovered by two geoscientists from the University of Sydney. Better understanding of the slow carbon cycle will help us predict to what extent the continents, oceans and ocean crust will take up the extra human-induced rise in atmospheric carbon dioxide in the long run. (2018-02-14)

Why the seafloor starts moving
When the seabed loses its stability and starts to move, it often happens in much larger dimensions than landslides ashore -- and at slopes with very low gradients. At the same time, discplacement of large amounts of sediment under water scan cause devastating tsunamis. However, why and when submarine landslides develop is hardly understood. Marine scientists from GEOMAR Helmholtz Centre for Ocean Research Kiel have now published possible causes based on observations on submarine landslides off the coast of northwest Africa in the international journal Geology. (2018-02-13)

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