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  • image of Arctic sea ice on March 7, 2017
  • Saturn's moon Mimas
  • fishing boat full of anchoveta
Your search has returned 179 articles:
  • Science Ticker

    Arctic sea ice hits record wintertime low

    Arctic sea ice has hit a record low for the third year in a row. It’s the paltriest maximum extent seen since recordkeeping began in 1979, scientists at NASA and the National Snow and Ice Data Center announced March 22.

    Total sea ice cover on the Arctic Ocean peaked on March 7, satellite observations show, reaching a total area of 14.42 million square kilometers. That’s around 100,000...

    03/23/2017 - 12:31 Climate, Oceans
  • Science Ticker

    Saturn’s ‘Death Star’ moon may not conceal an ocean after all

    An ocean of liquid water probably doesn’t lurk beneath the icy surface of Mimas, Saturn’s smallest major moon, new calculations suggest. Scientists had proposed the ocean in 2014 to help explain an odd wobble in the moon’s orbit.

    Other ocean-harboring moons, such as Jupiter’s Europa and Saturn’s Enceladus, are crisscrossed by fractures opened by strong tides that cause their oceans to...

    02/28/2017 - 14:07 Planetary Science, Oceans
  • Wild Things

    Most fish turned into fishmeal are species that we could be eating

    A person growing up in Peru in the 1970s or 1980s probably didn’t eat anchoveta, the local species of anchovies. The stinky, oily fish was a food fit only for animals or the very poor. The anchoveta fishery may have been (and still is, in many years) the world’s largest, but it wasn’t one that put food on the table.

    For thousands of years, though, anchoveta fed the people of Peru. It was...

    02/27/2017 - 07:00 Sustainability, Oceans, Animals
  • Science Ticker

    Antarctic sea ice shrinks to record low

    Sea ice around Antarctica shrunk to its lowest monthly extent on record in January, the National Oceanic and Atmospheric Administration reports.

    Antarctic sea ice extent averaged just 4.04 million square kilometers, 1.19 million square kilometers below the 1981 through 2010 average. That’s 280,000 square kilometers smaller than the previous record low, set in 2006.

    The new record...

    02/17/2017 - 13:14 Climate, Oceans, Earth
  • News

    Seagrasses boost ecosystem health by fighting bad bacteria

    BOSTON — For a lawn that helps the environment — and doesn’t need to be mowed — look to the ocean. Meadows of underwater seagrass plants might lower levels of harmful bacteria in nearby ocean waters, researchers reported February 16 during a news conference at the annual meeting of the American Association for the Advancement of Science. That could make the whole ecosystem — from corals to...

    02/16/2017 - 14:00 Ecosystems, Oceans
  • Teaser

    Sound waves could take a tsunami down a few notches

    A tsunami’s immense wall of water may not be stoppable. But there may be a way to take the ferocious force of nature down a few notches, using a pair of counterwaves.

    If released at the right moment, a type of sound wave known as an acoustic-gravity wave could subdue a tsunami, applied mathematician Usama Kadri of Cardiff University in Wales reports January 23 in Heliyon. These acoustic-...

    02/15/2017 - 09:00 Physics, Oceans
  • News

    Fleeting dead zones can muck with seafloor life for decades

    Short bouts of suffocating conditions can desolate swaths of seafloor for decades, new research suggests. That devastation could spread in the future, as rising temperatures and agricultural runoff enlarge oxygen-poor dead zones in the world’s oceans.

    Monitoring sections of the Black Sea, researchers discovered that even days-long periods of low oxygen drove out animals and altered...

    02/10/2017 - 15:06 Oceans, Ecosystems, Chemistry
  • Science Ticker

    Cone snails wander in circles, lose focus with boosted CO2

    Cone snails are normally stealthy hunters, but they become clumsy and unfocused in water with increased levels of carbon dioxide.

    Oceans absorb CO2 from the atmosphere. As atmospheric CO2 levels rise, those in the oceans do too, changing the chemistry of the seawater.

    Cone snails (Conus marmoreus) that spent several weeks in water dosed to simulate CO2 levels expected at the turn...

    02/02/2017 - 17:00 Oceans, Climate, Animals
  • News

    Climate change may boost toxic mercury levels in sea life

    The muddying of coastal waters by climate change could drastically increase levels of neurotoxic mercury in sea life, contaminating food supplies.

    Shifting rainfall patterns may send 10 to 40 percent more water filled with dissolved bits of organic debris into many coastal areas by 2100. The material can cloud the water, disrupting marine ecosystems by shifting the balance of microbes at...

    01/27/2017 - 14:10 Oceans, Pollution, Climate
  • News in Brief

    Earth’s last major warm period was as hot as today

    The last time Earth’s thermostat was cranked as high as it is today, sea levels were high enough to completely drown New Orleans (had it existed at the time), new research suggests.

    Ocean surface temperatures around 125,000 years ago were comparable to those today, researchers report in the Jan. 20 Science. Previous estimates suggested that this period, the height of the last warm phase...

    01/19/2017 - 14:00 Climate, Earth, Oceans