The United States Geological Survey (USGS) reports that ice shelves are retreating in the southern section of the Antarctic Peninsula due to climate change. The disappearing ice could lead to sea-level rise if warming continues, threatening coastal communities and low-lying islands worldwide.
Every ice front in the southern part of the Antarctic Peninsula has been retreating overall from 1947 to 2009, according to the USGS, with the most dramatic changes occurring since 1990. Previously documented evidence indicates that the majority of ice fronts on the entire Peninsula have also retreated during the late 20th century and into the early 21st century.
The ice shelves are attached to the continent and already floating, holding in place the Antarctic ice sheet that covers about 98 percent of the Antarctic continent. As the ice shelves break off, it is easier for outlet glaciers and ice streams from the ice sheet to flow into the sea. The transition of that ice from land to the ocean is what raises sea level.
The Peninsula is one of Antarctica's most rapidly changing areas because it is farthest away from the South Pole, and its ice shelf loss may be a forecast of changes in other parts of Antarctica and the world if warming continues.
Retreat along the southern part of the Peninsula is of particular interest because that area has the Peninsula's coolest temperatures, demonstrating that global warming is affecting the entire length of the Peninsula.
The Antarctic Peninsula's southern section as described in this study contains five major ice shelves: Wilkins, George VI, Bach, Stange and the southern portion of Larsen Ice Shelf. The ice lost since 1998 from the Wilkins Ice Shelf alone totals more than 4,000 square kilometers, an area larger than the state of Rhode Island.
"This research is part of a larger ongoing USGS project that is for the first time studying the entire Antarctic coastline in detail, and this is important because the Antarctic ice sheet contains 91 percent of Earth's glacier ice," said USGS scientist Jane Ferrigno. "The loss of ice shelves is evidence of the effects of global warming. We need to be alert and continually understand and observe how our climate system is changing."
Citation: Ferrigno et al., 'Coastal-Change and Glaciological Map of the Palmer Land Area, Antarctica: 1947—2009', USGS, February 2010
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- What Lies Beneath West Antarctica?
- Contemporary Polymath: How The Renaissance Man Is Making A Comeback
- How To Make Women's Tennis More Competitive
- Scientists Discover Oral Sex In Spiders
- Matter Can Potentially Accelerate The Expansion Of The Universe
- How Nature Disrupts Coral Reefs' Recycling
- Researchers Find Brain Circuit That Controls Binge Drinking
- "Up until college, the educational system did their best to make me fear and loath math. The constant..."
- "Choosing just two of many issues: You can't get what 2+3 or 2*3 are without just taking them from..."
- "But if the vacuum structure around us turns out not to be the same as in empty regions of our Universe..."
- "Different topics.Best,EML..."
- "We'd suggest an alternate solution. Level-Based Play: http://blog.universaltennis.com/2016/04/28/level..."
- Parents' presence at bedside found to decrease neonatal abstinence syndrome severity
- Breastfeeding app shows promise in supporting first-time mothers
- Study shows asthma-related Twitter posts can predict rise in hospital visits
- Mental health diagnoses rise significantly for military children
- Combination of face-to-face and online bullying may pack a powerful punch