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?
- Intellectually Gifted Kids And Learning Disabilities Often Go Hand In Hand
- NRDC Says Your Xbox Is Causing Global Warming - But It Isn't
- Another One Bites The Dust - WW Cross Section Gets Back Where It Belongs
- New Autism-causing Genetic Variant Identified
- When Does Quantum Mechanics Become Classical Physics?
- A Tampon Could Help Predict Endometrial Cancer
- How To Save Formula 1
- "Hi Hank - lots of good comments - some I agree with - others not so much, LOL. The old saying of..."
- "It is a science site, which is why absolutely no one reading here agrees with your conclusion ..."
- "I would side with the tree huggers too, I once worked for PIRG, except in this case the tree hugger..."
- "Well for once [I almost never do] I am gong to take the side of the environmental tree huggers..."
- "Autism is neurological condition, a developmental disorder, and NOT a disease!!! Stop telling people..."