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Firn Air Study in the Megadunes Near Vostok, Antarctica

Entry ID: severinghaus_nsf0230452

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Summary

Abstract: This award supports a study of the chemical composition of air in the snow
layer (firn) in a region of "megadunes" near Vostok station, Antarctica. It
will test the hypothesis that a deep "convective zone" of vigorous wind-driven
mixing can prevent gas fractionation in the upper one-third of the polar firn
layer. In the megadunes, ultralow snow accumulation rates lead to ...

Related URL

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Description: Abrupt climate change is the primary focus of research within the Severinghaus
Laboratory.

Link: VIEW RELATED INFORMATION

Description: Scientists from NSIDC have spent the last two Antarctic field seasons studying
one of the little-known megadunes areas of the continent. The NSIDC Research
Team, which included Ted Scambos, Rob Bauer, and Terry Haran, worked with a
team of other researchers and support staff in extreme weather conditions to
gather data in one of the most remote parts of the world. Unlike snow dunes
that are piles of drifted snow, Antarctic megadunes are long, undulating waves
in the surface of the ice sheet. The dunes are 2 to 4 meters (6.5 to 13 feet)
high and 2 to 5 kilometers (1 to 3 miles) apart.

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Description: The Antarctic Glaciological Data Center (AGDC) at the National Snow and Ice
Data Center (NSIDC) archives and distributes Antarctic glaciological and
cryospheric system data collected by the U.S. Antarctic Program.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

	N: -80.78	S: -80.78	E: 124.5	W: 124.5
Min Altitude: 2896 M Max Altitude: 2896 M

Location Keywords

CONTINENT > ANTARCTICA

GEOGRAPHIC REGION > POLAR

Science Keywords

ATMOSPHERE > ATMOSPHERIC CHEMISTRY

CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

FIELD SURVEYS

GROUND-BASED OBSERVATIONS

LABORATORY

FIELD INVESTIGATION

Instrument

CORING DEVICES

FLASKS

Project

NSF/OPP > Office of Polar Programs, National Science Foundation

Ancillary Keywords

megadunes

Antarctica

Data Set Progress

IN WORK

Originating Center

Severinghaus Laboratory, Scripps Institution of Oceanography

Data Center

National Snow and Ice Data Center

Data Center URL: http://nsidc.org

Data Center Personnel
Name: NSIDC USER SERVICES Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA

NSIDC Antarctic Glaciological Data Center

Data Center URL: http://nsidc.org/agdc/

Data Center Personnel
Name: ROB BAUER Phone: 303-492-2378 Fax: 303-492-2468 Email: bauer at nsidc.org Contact Address: University of Colorado Cooperative Institute for Research in Environmental Sciences CIRES 449 UCB City: Boulder Province or State: CO Postal Code: 80309 Country: USA

Personnel

JEFFREY P SEVERINGHAUS

Role: INVESTIGATOR

Phone: 858-822-2483

Fax: 858-822-3310

Email: jseveringhaus at ucsd.edu

Contact Address:

Scripps Institution of Oceanography

9500 Gilman Dr.

City: La Jolla

Province or State: CA

Postal Code: 92093-0244

Country: USA

MARY R. ALBERT

Role: INVESTIGATOR

Phone: 603-646-0277

Email: mary.r.albert at dartmouth.edu

Contact Address:

Thayer School of Engineering at Dartmouth

14 Engineering Drive

City: Hanover

Province or State: NH

Postal Code: 03755

Country: USA

ROB BAUER

Role: DIF AUTHOR

Phone: 303-492-2378

Fax: 303-492-2468

Email: bauer at nsidc.org

Contact Address:

University of Colorado

Cooperative Institute for Research in Environmental Sciences

CIRES 449 UCB

City: Boulder

Province or State: CO

Postal Code: 80309

Country: USA

Publications/References

Severinghaus, J.P., and Battle, M., Fractionation of gases in polar ice during
bubble close-off: new constraints from firn air Ne, Kr, and Xe observations,
Earth Planet Sci. Lett. 244, 474-500 (2006). doi: 10.1016/j.epsl.2006.01.032.

Creation and Review Dates

DIF Creation Date: 2006-09-27

Last DIF Revision Date: 2009-01-08

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