Articles tagged with Glaciers
The Larsen B ice shelf has disintegrated in a record-breaking 35-day period, losing 3,250 square kilometers of shelf area. This collapse is attributed to strong regional climate warming, which has increased Antarctic temperatures by 2.5 degrees Celsius since the late 1940s.
A Rutgers scientist is linking global climate change to changes in ice and snow cover, citing convincing evidence of warming trends. The scientist's data shows that the amount of snow covering in North America and Eurasia has been shrinking over the years.
Glacier melting and climate change are leading to sea level rises, with the world's glaciers shrinking faster than they did in recent millennia. The International Panel on Climatic Change (IPCC) projections are considered too low due to glacier sensitivity and hydrological cycle changes.
A revised estimate of glacier ice loss suggests a 20% contribution to observed sea level rise, with some glaciers smaller than they have been in thousands of years. Glacier melting could contribute up to 0.65 feet to sea level this century, surpassing the IPCC's estimated 0.16-0.36 feet.
Scientists have tracked sea level changes and volumes of glacial ice using fossil corals. The study found that sea levels rose too early to be consistent with Milankovitch's orbital forcing, implying other factors can override glacial cycles.
Researchers predict Alaska's Columbia Glacier will double its rate of retreat and lose nearly 10 miles over the next decade due to increased calving speeds. This is driven by the glacier's terminus being thinner on average and being in deeper water, allowing it to flow faster.
A new study from University of Colorado at Boulder shows that global temperatures have risen one degree Fahrenheit over the past 100 years, causing snow and ice to decline around the world. The Arctic region is particularly sensitive to temperature changes, with sea ice extent decreasing by about 3 percent per decade.
A NASA-funded study found that glacier melting can shut down North Atlantic Deep Water production, leading to a reduced Gulf Stream and cooling Western Europe. The study suggests that freshwater additions from increased rain and snow could cause this phenomenon in the future.
A team of researchers has developed a new technique using lichens to track recent climate change. By analyzing the size of lichens in different regions, scientists can create a timeline of glacier retreating glaciers in New Zealand. This method could provide valuable insights into global warming and its effects on the environment.
Researchers analyzed growth bands in Antarctic scallop shells to understand climate change, finding a long-term warming trend since the early 1950s. The study also reveals seasonal temperature variations and the impact of glacial meltwater on coastal waters.
The Columbia Glacier, the world's speediest glacier, is on a course to disintegrate due to rapid calving. Researchers expect significantly increased calving events into Prince William Sound, posing a potential hazard to ships.
Boston College scientist Kevin G. Harrison proposes the Silica Hypothesis, which suggests that increasing ocean silica levels can remove carbon dioxide from the atmosphere, slowing global warming. This mechanism may be responsible for decreased atmospheric CO2 levels during glacial times and could be relevant to today's climate change.
A Penn State researcher suggests that increasing oxygen levels may have triggered the first of three past episodes when the Earth became a giant snowball, covered from pole to pole by ice and frozen oceans. The study proposes that low methane levels and high carbon dioxide levels were responsible for the glaciation process.
The Columbia Glacier in Alaska has increased its speed to 35 meters per day, raising concerns among scientists about a rapid decline. The glacier, already the fastest moving glacier in the world, is now expected to retreat at an alarming rate, potentially posing risks to shipping lanes and marine ecosystems.
Ground-penetrating radar is used to map large areas and determine snowfall patterns, providing a record for comparison with climate models. The technology can accurately date ice layers, which is essential for studying glacial cycles and changes in atmospheric chemistry.
A new study reveals that glaciers prompted volcanic eruptions after they retreated north over the past 800,000 years. The research found that volcanoes were subdued when glaciers were present and became active when they retreated, suggesting a possible connection between climate change and volcanic activity.
Researchers at Ohio State University have retrieved the first ice cores from the Dasuopu Glacier, a 40-meter-wide ice field on the Tibetan Plateau. The cores contain glacial stage ice dating back at least 12,000 years and are expected to provide valuable insights into the monsoonal climate system.
The Variegated Glacier surged hundreds of yards by the end of summer, surprising scientists with an early start. Researchers believe the glacier will follow similar surge-and-rest patterns in the future.