Snow and Avalanches

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  • Study validates East Antarctic ice sheet to remain stable even if western ice sheet melts
    on August 17, 2017 at 8:20 pm

    A new study validates that the central core of the East Antarctic ice sheet should remain stable even if the West Antarctic ice sheet melts. […]

  • Greenland ice flow likely to speed up
    on August 16, 2017 at 6:18 pm

    Flow of the Greenland Ice Sheet is likely to speed up in the future, despite a recent slowdown, because its outlet glaciers slide over wet sediment, not hard rock, new research based on seismic surveys has confirmed. This sediment will become weaker and more slippery as global temperatures rise and meltwater supply becomes more variable. The findings challenge the view that the recent slowdowns in ice flow would continue in the long term. […]

  • World's largest volcanic range may lurk beneath Antarctic ice
    on August 14, 2017 at 1:27 pm

    West Antarctica's vast ice sheet conceals what may be the largest volcanic region on Earth, new research has revealed. […]

  • Not all glaciers in Antarctica have been affected by climate change
    on August 8, 2017 at 10:23 pm

    The effects of climate change, which are apparent in other parts of the Antarctic continent, are not yet observed for glaciers in the western Ross Sea coast, new research indicates. […]

  • Laser mapping project shows effects of physical changes in Antarctica's Dry Valleys
    on August 8, 2017 at 6:53 pm

    Researchers have publicly released high-resolution maps of Antarctica's McMurdo Dry Valleys, a globally unique polar desert. […]

  • Researchers crack the 'Karakoram anomaly': Why glaciers near K2 are growing in size
    on August 7, 2017 at 3:28 pm

    Researchers identify 'Karakoram vortex' and explain why glaciers near K2 are growing in size. […]

  • Extreme melt season leads to decade-long ecosystem changes in Antarctic polar desert
    on August 7, 2017 at 3:15 pm

    An abnormal season of intense glacial melt in 2002 triggered multiple distinct changes in the physical and biological characteristics of Antarctica's McMurdo Dry Valleys over the ensuing decade, report investigators. […]

  • Alaska's North Slope snow-free season is lengthening
    on August 3, 2017 at 6:10 pm

    On the North Slope of Alaska, snow is melting earlier in the spring and the snow-in date is happening later in the fall, according to a new study. […]

  • Update on the Larsen-C iceberg breakaway
    on August 2, 2017 at 12:29 pm

    Since an iceberg four times the size of London broke free earlier this month, scientists have continued to track its progress using satellites. Their observations show the Larsen-C story might not be over yet. […]

  • Methane-eating microbes may reduce release of gases as Antarctic ice sheets melt
    on July 31, 2017 at 5:41 pm

    A lake beneath the West Antarctic ice sheet contains large amounts of methane. New research describes how methane-eating microbes may keep the climate-warming gas from entering the atmosphere. […]

  • Summer sea ice melt in the Arctic
    on July 24, 2017 at 5:31 pm

    Earlier this year Arctic sea ice sank to a record low wintertime extent for the third straight year. Now NASA is flying a set of instruments north of Greenland to observe the impact of the melt season on the Arctic's oldest and thickest sea ice. […]

  • Stronger winds heat up West Antarctic ice melt
    on July 17, 2017 at 3:54 pm

    Stronger winds 6000kms away on the East Antarctic, have generated waves that circle the continent at almost 700kmh. When these waves meet the steep underwater topography of the West Antarctic Peninsula they push warm water under the ice shelves. This helps explain the increased ice melt in this region that can lead trillion tonne ice shelves, like Larsen C, to break away from the continent. […]

  • Warm winter events in Arctic becoming more frequent, lasting longer
    on July 11, 2017 at 4:15 pm

    Arctic winter warming events -- winter days where temperatures peak above 14 degrees Fahrenheit (minus 10 degrees Celsius) -- are a normal part of the climate over the ice-covered Arctic Ocean. But new research by an international team that includes NASA scientists finds these events are becoming more frequent and lasting longer than they did three decades ago. […]

  • Greenland ice sheet toxicity
    on July 11, 2017 at 3:27 am

    The Greenland ice sheet is often seen as a pristine environment, but new research has revealed that may not be the case. Scientists have examined how microbes from the ice sheet have the potential to resist and degrade globally-emitted contaminants such as mercury, lead, PAH and PCB. […]

  • West Antarctic Ice Sheet loss over the last 11,000 years seen in new study
    on July 5, 2017 at 5:30 pm

    Wind-driven incursions of warm water forced the retreat of glaciers in West Antarctica during the past 11,000 years, a new report explains. These new results enable researchers to better understand how environmental change may impact future sea-level rise from this climate-sensitive region. […]

  • Black carbon varies, but stubbornly persists, in snow and ice around the world
    on June 30, 2017 at 6:07 pm

    A new study comparing dissolved black carbon deposition on ice and snow in ecosystems around the world (including Antarctica, the Arctic, and alpine regions of the Himalayas, Rockies, Andes, and Alps) shows that while concentrations vary widely, significant amounts can persist in both pristine and non-pristine areas of snow. […]

  • More summer sunshine leading to increased Greenland ice melt
    on June 28, 2017 at 6:49 pm

    A marked decrease in summer cloud cover during the last 20 years has significantly accelerated melt from the Greenland ice sheet, a team of researchers has concluded. […]

  • Climate change impacts Antarctic biodiversity habitat
    on June 28, 2017 at 5:14 pm

    Ice-free areas of Antarctica -- home to more than 99 percent of the continent's terrestrial plants and animals -- could expand by more than 17,000 km2 by the end of this century, a study reveals. The study is among the first to investigate how ice-free areas in Antarctica may be affected by climate change. […]

  • Collapse of European ice sheet caused chaos in past
    on June 26, 2017 at 10:05 pm

    Scientists have reconstructed in detail the collapse of the Eurasian ice sheet at the end of the last ice age. The big melt wreaked havoc across the European continent, driving home the original Brexit 10,000 years ago. […]

  • Widespread snowmelt in West Antarctica during unusually warm summer
    on June 15, 2017 at 12:46 pm

    An area of West Antarctica more than twice the size of California partially melted in 2016 when warm winds forced by an especially strong El Nino blew over the continent. […]

  • Domes of frozen methane may be warning signs for new blow-outs
    on June 5, 2017 at 7:19 pm

    Several methane domes, some 500m wide, have been mapped on the Arctic Ocean floor. They may be signs of soon-to-happen methane expulsions that have previously created massive craters in a near-by area. […]

  • Antarctic ice rift close to calving, after growing 17km in 6 days, latest data from ice shelf shows
    on June 2, 2017 at 3:28 pm

    The rift in the Larsen C ice shelf in Antarctica has grown by 17km in the last few days and is now only 13km from the ice front, indicating that calving of an iceberg is probably very close, researchers revealed after studying satellite data. The rift is likely to lead to one of the largest icebergs ever recorded. […]

  • Massive craters formed by methane blow-outs from the Arctic sea floor
    on June 1, 2017 at 7:18 pm

    Hundreds of massive, kilometer-wide craters on the ocean floor in the Arctic were formed by substantial methane expulsions, new research explains. […]

  • Geoscientific evidence for subglacial lakes
    on June 1, 2017 at 12:22 pm

    During the last glacial period -- when the ice in the Antarctic was far thicker and extended further offshore than it does today -- it has been speculated that subglacial lakes existed beneath it. An international team of researchers has now successfully sampled the meter-thick sediment layers left behind by these lakes contemporary on the seafloor. […]

  • Are wolverines in the Arctic in the climate change crosshairs?
    on May 24, 2017 at 5:11 pm

    Will reductions in Arctic snow cover make tundra-dwelling wolverines more vulnerable to climate change than previously thought? That's a question scientists hope an innovative method described in a new study will help answer. […]

  • Saying goodbye to glaciers
    on May 11, 2017 at 6:19 pm

    Glaciers around the world are disappearing before our eyes, and the implications for people are wide-ranging and troubling, a glacier expert concludes in a new study. […]

  • Teleconnection between the tropical Pacific and Antarctica
    on May 11, 2017 at 1:50 pm

    The higher the seawater temperature in the tropical Pacific, the more likely ice breakup will occur in East Antarctica, according to researchers. […]

  • Irreversible ocean warming threatens the Filchner-Ronne Ice Shelf
    on May 11, 2017 at 1:50 pm

    By the second half of this century, rising air temperatures above the Weddell Sea could set off a self-amplifying meltwater feedback cycle under the Filchner-Ronne Ice Shelf, ultimately causing the second-largest ice shelf in the Antarctic to shrink dramatically. […]

  • Glaciers rapidly shrinking and disappearing: 50 years of glacier change in Montana
    on May 10, 2017 at 5:19 pm

    The warming climate has dramatically reduced the size of 39 glaciers in Montana since 1966, some by as much as 85 percent. On average, the glaciers have reduced by 39 percent and only 26 glaciers are now larger than 25 acres, which is used as a guideline for deciding if bodies of ice are large enough to be considered glaciers. […]

  • Oversized landforms discovered beneath the Antarctic ice sheet
    on May 9, 2017 at 1:35 pm

    Scientists have now discovered an active hydrological system of water conduits and sediment ridges below the Antarctic ice sheet. […]