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Summary
A broad-band seismometer (Guralp 40T, with Quanterra Q330 digitizer/baler) was operated at a site called "Nascent Iceberg" (located on the Ross Ice Shelf about 1 km north of a large rift expected to eventually break and produce the next iceberg from the Ross Ice Shelf) from November 2004 through November 2006. This instrument recorded during the October - May time period of each year ... when solar power was available to maintain battery voltage. The data collected consist of 3 channels (two horizontal, one vertical) sampled at both 100 Hz and at 1 Hz. The 100 Hz data is archived with the IRIS data archive program, and users may consult with IRIS about obtaining this data. Here, the 1 Hz signal (on 3 channels) is archived for convenience of glaciological users wishing to examine how sea-swell and other longer-period signals influence the Ross Ice Shelf.The data time series (1 Hz on 3 channels) are processed from "raw" instrument records to obtain ground (ice surface) motion (in 3 directions). Instrument response characteristics have been accounted for (by deconvolution) in the analysis required to obtain ground motion.

The raw 1 Hz data is also available (soon) at IRIS.

Originating Center: University of Chicago, United States Antarctic Program, National Science Foundation

Geographic Coverage Spatial coordinates   

N: -78.0

S: -78.0

E: -178.0

W: -178.0

Data Set Citation

Dataset Creator: L. Mac Cathles Dataset Title: Seismometer data from calving front of Ross Ice Shelf

Temporal Coverage

Start Date: 2004-11-04 Stop Date: 2005-05-05

Location Keywords

OCEAN > SOUTHERN OCEAN > ROSS SEA > Nascent Iceberg CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN > ROSS SEA > Ross Ice Shelf

Data Resolution

Latitude Resolution: 10 m Longitude Resolution: 10 m Horizontal Resolution Range: 1 meter - < 30 meters Temporal Resolution: 20 min Temporal Resolution Range: 1 minute - < 1 hour

Science Keywords

CRYOSPHERE > GLACIERS/ICE SHEETS > ICEBERGS SOLID EARTH > SEISMOLOGY OCEANS > OCEAN WAVES > GRAVITY WAVES OCEANS > OCEAN WAVES > SURF BEAT OCEANS > OCEAN WAVES > SWELLS

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE OCEANS

Platform

SEISMOLOGICAL STATIONS

Instrument

SEISMOMETERS

Project

NSF_AWARD_0229546 > Collaborative Research: Ice Shelf Rifting, Calving, and the Drift of Large icebergs

Quality
The Guralp 40T sensor and associated digitizing equipment were obtained from PASSCAL and deployed in a shallow snow pit on the Ross Ice Shelf (near the AWS site called "Nascent"). Solar panels were used to generate power for a 12 v battery system.

Access Constraints
Data is free for anyone to use.

Use Constraints
Data is free for anyone to use.

Ancillary Keywords

iceberg drift iceberg latitude and longitude iceberg weather (AWS) firn temperature iceberg automatic camera iceberg seismicity ice shelf motion ice shelf surface temperature ice shelf weather ice shelf rift camera iceberg snow accumulation Ross Ice Shelf seismometer station

Data Set Progress

COMPLETE

Originating Center

Please See Summary

Data Center

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: CIRES, 449 UCB City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA 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

Distribution

Distribution Media: ftp Distribution Size: 800 mbytes Distribution Format: ascii text Fees: none

Personnel

DOUGLAS R. MACAYEAL Role: INVESTIGATOR Phone: 773-702-8027 Fax: 773-702-9505 Email: drm7 at midway.uchicago.edu Contact Address: Department of Geophysical Sciences University of Chicago 5734 S. Ellis Ave City: Chicago Province or State: IL Postal Code: 60637 Country: USA MAC L. CATHLES Role: INVESTIGATOR Email: mcathles at uchicago.edu Contact Address: Department of Geophysical Sciences University of Chicago 5734 S. Ellis Ave. City: Chicago Province or State: IL Postal Code: 60637 Country: USA EMILE A. OKAL Role: INVESTIGATOR Phone: 847-491-3238 Email: emile at earth.northwestern.edu Contact Address: Department of Geological Sciences Northwestern University City: Evanston Province or State: IL Postal Code: 60208 Country: USA JONATHAN E. THOM Role: TECHNICAL CONTACT Phone: 608 263-4207 Fax: 608-262-5974 Email: jthom at ssec.wisc.edu Contact Address: SSEC University of Wisconsin-Madison 1225 W Dayton Street City: Madison Province or State: WI Postal Code: 53706 Country: United States

Related URL

Link: GET DATA Description: The files contain a short header (number of data samples, sample rate, start time, stop time, channel title)The time series data then follow the header above.

Publications/References
Cathles, L. M., E. A. Okal & D. R. MacAyeal, in review. Seismic observations of sea swell on the floating Ross Ice Shelf, Antarctica. J. Geophys. Res., under review, August 2008.

MacAyeal, D. R., E. A. Okal, R. C. Aster, J. N. Bassis, K. M. Brunt, L. M. Cathles, 511R. Drucker, H. A. Fricker, Y. J. Kim, S. Martin, M. H. Okal, O. V. Sergienko, M. P. Sponsler, and J. E. Thom (2006), Transoceanic wave propagation links iceberg calving margins of Antarctica with storms in tropics and Northern Hemisphere, Geophysical Research Letters, 33 (17), L17,502. 515

Creation and Review Dates

DIF Creation Date: 2008-09-19 Last DIF Revision Date: 2009-01-08

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