115
severinghaus_1143619
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Fugitive Gases (Helium, Neon, and Oxygen) in the WAIS Divide Ice Core as Tracers of Basal Processes and Past Biospheric Carbon Storage
INVESTIGATOR
JEFFREY
P
SEVERINGHAUS
Scripps Institution of Oceanography
9500 Gilman Dr.
La Jolla
CA
92093-0244
USA
858-822-3310
Fax
858-822-2483
Telephone
jseveringhaus@ucsd.edu
TECHNICAL CONTACT
NSIDC AGDC
USER SERVICES
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
+1 (303) 492-2468
Fax
+1 (303) 492-6199
Telephone
nsidc@nsidc.org
EARTH SCIENCE
CRYOSPHERE
GLACIERS/ICE SHEETS
EARTH SCIENCE
CRYOSPHERE
SNOW/ICE
EARTH SCIENCE
CRYOSPHERE
SNOW/ICE
SNOW/ICE CHEMISTRY
EARTH SCIENCE
PALEOCLIMATE
ICE CORE RECORDS
EARTH SCIENCE
PALEOCLIMATE
ICE CORE RECORDS
ISOTOPES
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Fugitive Gases
Helium
Neon
Oxygen
tracers
Basal Processes
Past Biospheric Carbon Storage
WAIS Divide
Antarctica
Not provided
Not provided
MASS SPECTROMETERS
Not provided
FIELD INVESTIGATION
Not provided
Not provided
FIELD SURVEYS
Not provided
Not provided
LABORATORY
Not provided
2012-07-01T00:00:00.000Z
2015-06-30T23:59:59.999Z
Horizontal
NO_SPATIAL
CARTESIAN
-79.47
-79.47
-112.09
-112.09
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GEOGRAPHIC REGION
POLAR
CONTINENT
ANTARCTICA
WAISDIVIDE
West Antarctic Ice Sheet Divide Project
NSF/PLR
Division of Polar Programs, National Science Foundation
English
ARCHIVER
DISTRIBUTOR
NSIDC_AGDC
NSIDC Antarctic Glaciological Data Center
https://nsidc.org/data/agdc/
DATA CENTER CONTACT
NSIDC AGDC
USER SERVICES
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
+1 (303) 492-2468
Fax
+1 (303) 492-6199
Telephone
nsidc@nsidc.org
ARCHIVER
DISTRIBUTOR
NSIDC
National Snow and Ice Data Center
http://nsidc.org
DATA CENTER CONTACT
NSIDC
USER SERVICES
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder
CO
80309-0449
USA
+1 (303) 492-2468
Fax
+1 (303) 492-6199
Telephone
nsidc@nsidc.org
This award supports a project to extend the study of gases in ice cores to those gases whose small molecular diameters cause them to escape rapidly from ice samples (the so-called "fugitive gases"). The work will employ helium, neon, argon, and oxygen measurements in the WAIS Divide ice core to better understand the mechanism of the gas close-off fractionation that occurs while air bubbles are incorporated into ice.
This work is funded by NSF PLR Award #1143619
The intellectual merit of the proposed work is that corrections for this fractionation using neon (which is constant in the atmosphere) may ultimately enable the first ice core-based atmospheric oxygen and helium records. Neon may also illuminate the mechanistic link between local insolation and oxygen used for astronomical dating of ice cores. Helium measurements in the deepest ~100 m of the core will also shed light on the stratigraphic integrity of the basal ice, and serve as a probe of solid earth-ice interaction at the base of the West Antarctic ice sheet. Past atmospheric oxygen records, currently unavailable prior to 1989 CE, would reveal changes in the size of the terrestrial biosphere carbon pool that accompany climate variations and place constraints on the biogeochemical feedback response to future warming.
VIEW RELATED INFORMATION
GENERAL DOCUMENTATION
http://scrippsscholars.ucsd.edu/jseveringhaus
Scripps Institution of Oceanography
VIEW RELATED INFORMATION
http://www.waisdivide.unh.edu/about/
On December 1, 2011, the West Antarctic Ice Sheet (WAIS) Divide ice core project, funded by the National Science Foundation (NSF), reached its final depth of 3405 meters (11,171 feet; over 2 miles), recovering the longest U.S. ice core to date from the polar regions. The 12.2-centimeter (4.8-inch) diameter cylinders of ice that make up the ice core contain uniquely detailed information on past environmental conditions during the last 68,000 years, such as the atmospheric concentration of greenhouse gases, surface air temperature, wind patterns, the extent of sea ice around Antarctica, and the average temperature of the ocean.
VIEW RELATED INFORMATION
http://www.nsf.gov/awardsearch/showAward?AWD_ID=1143619
NSF Award #1143619
AMD/US
AMD
CEOS
USA/NSF
CEOS IDN DIF
VERSION 10.2
2015-07-13
2017-04-21
1970-01-01T00:00:00
1970-01-01T00:00:00
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2015-12-02 14:17:31
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8.1
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