Oceanography

Oceanography News -- ScienceDaily Oceanography news. Learn about ocean currents, coastal erosion, sea level rising and other topics in physical oceanography.

  • Antarctic ice sheet is melting, but rising bedrock below could slow it down
    on June 21, 2018 at 6:11 pm

    An international team of researchers has found that the bedrock below the remote West Antarctic Ice Sheet is rising much more rapidly than previously thought, in response to ongoing ice melt. […]

  • Ocean's heat cycle shows that atmospheric carbon may be headed elsewhere
    on June 19, 2018 at 5:28 pm

    A new study examined the global carbon cycle and suggests that scientists may have misgauged how carbon is distributed around the world, particularly between the northern and southern hemispheres. The results could change projections of how, when and where the currently massive levels of atmospheric carbon will result in environmental changes such as ocean acidification. […]

  • World's first known manta ray nursery
    on June 19, 2018 at 4:31 pm

    Located in the Gulf of Mexico off the coast of Texas at NOAA's Flower Garden Banks National Marine Sanctuary, the juvenile manta ray habitat is the first of its kind to be described in a scientific study. […]

  • New model for gauging ice sheet movement may improve sea-level-rise predictions
    on June 19, 2018 at 4:24 pm

    Researchers discovered friction -- or 'basal drag' -- between ice sheets and the hard bed underneath has no influence on how fast glaciers flow. […]

  • Rising sea temperatures threaten survival of juvenile albatross
    on June 18, 2018 at 2:26 pm

    Changes in sea surface temperature affect the survival of albatross during their first year at sea, resulting in a reduced population growth rate when temperatures are warmer than the current average, a new study has revealed. […]

  • Great white sharks dive deep into warm-water whirlpools in the Atlantic
    on June 18, 2018 at 2:25 pm

    Tracking data from two great white sharks reveals that they spend more time deep inside warm-water eddies, suggesting that's where they like to feed. […]

  • Land-based portion of massive East Antarctic ice sheet retreated little during past eight million...
    on June 15, 2018 at 7:44 pm

    Large parts of the massive East Antarctic Ice Sheet did not retreat significantly during a time when atmospheric carbon dioxide concentrations were similar to today's levels. […]

  • Why the tongue of the Pine Island Glacier suddenly shrank
    on June 15, 2018 at 1:48 pm

    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. […]

  • Leading Antarctic experts offer two possible views of continent's future
    on June 15, 2018 at 1:38 am

    The next 10 years will be critical for the future of Antarctica, and choices made will have long-lasting consequences, says an international group of Antarctic research scientists. It lays out two different plausible future scenarios for the continent and its Southern Ocean over the next 50 years. […]

  • Who is to blame for marine litter?
    on June 15, 2018 at 1:37 am

    Members of the public are more likely to blame the global marine litter crisis on retailers, industry and government, according to new research. […]

  • What saved the West Antarctic Ice Sheet 10,000 years ago will not save it today
    on June 14, 2018 at 2:12 pm

    The retreat of the West Antarctic ice masses after the last Ice Age was reversed surprisingly about 10,000 years ago, scientists found. The reason for the rebound is that, relieved from the weight of the retreating ice, the Earth crust lifted. This made the ice re-advance towards the ocean. Unfortunately, this mechanism is much to slow to prevent dangerous sea-level rise caused by West Antarctica's ice-loss in the present and near future. […]

  • Ocean waves following sea ice loss trigger Antarctic ice shelf collapse
    on June 14, 2018 at 1:52 pm

    Storm-driven ocean swells have triggered the catastrophic disintegration of Antarctic ice shelves in recent decades, according to new research published in Nature today. […]

  • Decades of satellite monitoring reveal Antarctic ice loss
    on June 13, 2018 at 8:30 pm

    Scientists have reviewed decades of satellite measurements to reveal how and why Antarctica's glaciers, ice shelves and sea ice are changing. Their report explains how ice shelf thinning and collapse have triggered an increase in the continent's contribution to sea level rise. […]

  • Antarctica ramps up sea level rise
    on June 13, 2018 at 8:30 pm

    Ice losses from Antarctica have increased global sea levels by 7.6 mm since 1992, with two fifths of this rise (3.0 mm) coming in the last five years alone. The findings are from a major climate assessment known as the Ice Sheet Mass Balance Inter-comparison Exercise (IMBIE). It is the most complete picture of Antarctic ice sheet change to date -- 84 scientists from 44 international organizations combined 24 satellite surveys to produce the assessment. […]

  • Climate change accelerating rise in sea levels
    on June 13, 2018 at 8:30 pm

    A new study has discovered that rising sea levels could be accelerated by vulnerable ice shelves in the Antarctic. […]

  • Stress test to predict how diatoms will react to ocean acidification
    on June 13, 2018 at 8:26 pm

    Researchers have shown that diatoms can withstand population collapse in an acidified environment by conserving valuable energy normally used for carbon dioxide consumption. […]

  • Old Man River's unique chemical signature
    on June 13, 2018 at 3:36 pm

    Human activity greatly impacts the natural chemistry of the largest river in North America -- the Mississippi River. In a new, large-scale study, geologists have identified a unique chemical signature in the river. […]

  • To forecast winter rainfall in the Southwest, look to New Zealand in the summer
    on June 13, 2018 at 2:19 pm

    Scientists have discovered an atmospheric teleconnection that allows them to accurately predict winter precipitation in the southwestern United States by measuring summer sea surface temperatures near New Zealand. […]

  • Researchers investigate the correlation between wind and wave height in the Arctic Ocean
    on June 12, 2018 at 12:00 pm

    An international research team has found an increase in high waves and winds in the ice-free waters of the Arctic Ocean, a potentially dangerous navigational tipping point for the 'new and unusual' state of the waters. […]

  • Volcanic activity, declining ocean oxygen triggered mass extinction of ancient organisms
    on June 11, 2018 at 8:05 pm

    Global climate change, fueled by skyrocketing levels of atmospheric carbon dioxide, is siphoning oxygen from today's oceans at an alarming pace -- so fast that scientists aren't entirely sure how the planet will respond. […]

  • Fueling a deep-sea ecosystem
    on June 11, 2018 at 7:27 pm

    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. […]

  • Further drivers of ocean deoxygenation identified
    on June 11, 2018 at 5:38 pm

    Measurements as well as model calculations equally show that the oxygen inventory of the oceans is decreasing. However, the models underestimate this decrease significantly making projections into the future problematic. […]

  • Large-scale study indicates novel, abundant nitrogen-fixing microbes in surface ocean
    on June 11, 2018 at 5:34 pm

    A large-scale study of the Earth's surface ocean indicates the microbes responsible for fixing nitrogen there -- previously thought to be almost exclusively photosynthetic cyanobacteria -- include an abundant and widely distributed suite of non-photosynthetic bacterial populations. […]

  • Secret to whale shark hotspots
    on June 8, 2018 at 2:33 pm

    A study has uncovered the secret to why endangered whale sharks gather on mass at just a handful of locations around the world. […]

  • Secrets of fish population changes revealed
    on June 8, 2018 at 2:19 pm

    Populations of fish in the ocean are notoriously variable, waxing and waning in often unpredictable ways. Knowing what drives changes in fish population sizes is important for managing fisheries and conserving species. For the first time, scientists have linked the ecology of adult fish populations inhabiting coral reefs with the dispersal of baby fish between reefs, reporting the dynamics of a living network called a 'marine metapopulation.' […]

  • Nutritional quality of fish and squid reduced by warm water events
    on June 8, 2018 at 1:36 pm

    The nutritional quality of fish and squid deteriorates under warm water events, research reveals -- with implications for the marine environment, marine predators and fisheries capturing food for human consumption. […]

  • Gulf of Mexico 'dead zone' forecasted to exceed the size of Connecticut
    on June 7, 2018 at 4:07 pm

    Scientists have predicted the dead zone, or area with little to no oxygen in the northern Gulf of Mexico, will become larger than the state of Connecticut by the end of July, according to a new report. While there are more than 500 dead zones around the world, the northern Gulf of Mexico dead zone is the second largest human-caused coastal hypoxic area in the world. […]

  • How the quality of red sea urchin roe -- uni -- influences fishermen's behavior
    on June 6, 2018 at 9:01 pm

    Sea urchin roe is an acquired taste. Served as sushi, uni -- the Japanese word for this delicacy -- is actually the reproductive organ of the sea urchin. One of the most highly valued coastal fisheries in California is the red sea urchin (Mesocentrotus franciscanus), found in the Pacific Ocean from Alaska to Baja California. Red sea urchins are sold to processors who determine the price of each uni batch based on its quality -- a function of its size, shape, texture and color (usually orange to yellow). […]

  • Patenting marine genetic resources: Who owns ocean biodiversity?
    on June 6, 2018 at 6:37 pm

    Marine organisms have evolved to thrive in various ocean environments, resulting in unique adaptations that make them the object of commercial interest. Researchers have identified 862 marine species, with a total of 12,998 genetic sequences associated with a patent. They found that a single transnational corporation (BASF, the world's largest chemical manufacturer) has registered 47 percent of these sequences. […]

  • Nutrient pollution makes ocean acidification worse for coral reefs
    on June 6, 2018 at 1:37 pm

    A new study showed that local impacts of humans -- nutrient pollution from activities on land -- may accelerate the negative impacts of global ocean acidification on coral reefs. […]