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Global Change Master Directory (GCMD)
Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences
Entry ID: NSF-ANT07-32625


Summary
Abstract: This award supports a research cruise to perform geologic studies in the area under and surrounding the former Larsen B ice shelf, on the Antarctic Peninsula. The ice shelf's disintegration in 2002 coupled with the unique marine geology of the area make it possible to understand the conditions leading to ice shelf collapse. Bellwethers of climate change that reflect both oceanographic and atmospheric conditions, ice shelves also hold back glacial flow in key areas of the polar regions. Their collapse results in glacial surging and could cause rapid rise in global sea levels. This project characterizes the Larsen ice shelf's history and conditions leading to its collapse by determining: 1) the size of the Larsen B during warmer climates and higher sea levels back to the Eemian interglacial, 125,000 years ago; 2) the configuration of the Antarctic Peninsula ice sheet during the LGM and its subsequent retreat; 3) the causes of the Larsen B's stability through the Holocene, during which other shelves have come and gone; 4) the controls on the dynamics of ice shelf margins, especially the roles of surface melting and oceanic processes, and 5) the changes in sediment flux, both biogenic and lithogenic, after large ice shelf breakup.

The broader impacts include graduate and undergraduate education through research projects and workshops; outreach to the general public through a television documentary and websites, and international collaboration with scientists from Belgium, Spain, Argentina, Canada, Germany and the UK. The work also has important societal relevance. Improving our understanding of how ice shelves behave in a warming world will improve models of sea level rise.

The project is supported under NSF's International Polar Year (IPY) research emphasis area on 'Understanding Environmental Change in Polar Regions'.

Related URL
Link: View Related Information
Description: Antarctic Marine Geology Research Facility.
Original data submitted.


Link: View Related Information
Description: NSF Award Abstract #0732625

Geographic Coverage
 N: -57.0 S: -66.1  E: -57.8  W: -65.4

Data Set Citation
Version: Not provided


Temporal Coverage
Start Date: 2007-10-01
Stop Date: 2013-09-30


Location Keywords
OCEAN > SOUTHERN OCEAN
VERTICAL LOCATION > SEA FLOOR
VERTICAL LOCATION > SEA SURFACE


Science Keywords
OCEANS >MARINE SEDIMENTS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
OCEANS >AQUATIC SCIENCES    [Definition]


Project
NSF/PLR >Division of Polar Programs, National Science Foundation    [Information]


Data Set Progress
COMPLETE


Data Center
United States Antarctic Program Data Center    [Information]
Data Center URL: http://www.usap-dc.org/

Data Center Personnel
Name: ROBERT A. ARKO
Email: info at usap-data.org
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA


Personnel
AMY LEVENTER
Role: INVESTIGATOR
Email: aleventer at colgate.edu
Contact Address:
Colgate University
City: Hamilton
Province or State: NY
Postal Code: 13346
Country: US


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-12-17
Last DIF Revision Date: 2018-11-12



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