2024-03-29T04:55:56Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-0349.0012023-05-23T20:36:11Zbrokered
NSIDC-0349.001Iceberg Harmonic Tremor, Seismometer Data, AntarcticaMacAyeal, D. R., E. Okal, R. Aster, and J. Bassis.Iceberg Harmonic Tremor, Seismometer Data, Antarctica2008-10-01Boulder, Colorado USANSIDC: National Snow and Ice Data Center1false10.7265/N5445JD6https://doi.org/10.7265/N5445JD6NSIDC-0349InvestigatorDouglasR.MacAyealdrm7@uchicago.edu1-773-752-6078773-702-9509Department of Geophysical SciencesUniversity of Chicago5734 S. Ellis Ave.ChicagoIL60637USAInvestigatorEmileOkalEvanstonIllinois60208-2150USAInvestigatorRichardAsterSocorroNew Mexico87801USAInvestigatorJeremyBassisjbassis@umich.edu734-615-3606La Jolla,California92093-0225USATechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECryosphereGlaciers/Ice Sheets EARTH SCIENCECryosphereSea IceIcebergs ICEBERGSEARTH SCIENCEOceansSea IceIcebergs ICEBERGSEARTH SCIENCECryosphereGlaciers/Ice SheetsIcebergs ICEBERGSEARTH SCIENCECryosphereSnow/IceIce Motion ICE MOTIONEARTH SCIENCETerrestrial HydrosphereSnow/IceIce Motion ICE MOTIONEARTH SCIENCECryosphereSea IceSea Ice Motion SEA ICE MOTIONEARTH SCIENCEOceansSea IceSea Ice Motion SEA ICE MOTIONClimatology/Meteorology/AtmosphereAGDC-projectAntarcticaIcebergRoss Ice Shelfseismologyseismometer2003-12-272003-12-28complete-77-77168168ContinentAntarcticaEnglishAGDCFTP150 MBASCIIMacAyeal, D. R., E. A. Okal, R. C. Aster, and J. N. Bassis (2008), Seismic and hydroacoustic tremor generated by colliding icebergs, J. Geophys. Res., 113, F03011, doi:10.1029/2008JF001005.Seismometers were placed on a 25 km by 50 km iceberg called C16 in the Ross Sea, Antarctica, to identify the Iceberg harmonic Tremor (IHT) source mechanism and to understand the relevance of IHT to iceberg calving, drift and break-up. The seismic observations reveal that the IHT signal consists of extended episodes of stick-slip icequakes (typically thousands per hour) generated when the ice-cliff edges of two tabular icebergs rub together during glancing, strike/slip type iceberg collisions (e.g., between C16 and B15A). With the source mechanism revealed, IHT may provide a promising signal useful for the study of iceberg behavior and iceberg-related processes such as climate-induced ice-shelf disintegration.
Here, a single day of seismometer data for a single station on iceberg C16 is provided as an example of "a day in the life of an iceberg" for use by scientists and students wishing to know more about IHT. The station data is from C16 "B" site on C16's northeast corner, and the day is 27 December, 2003, a day when B15A struck C16 and caused an episode of tremor that was particularly easy to identify and understand.
This represents only a small fraction of the total data that exist for the seismic program on iceberg C16. The full data are archived at the IRIS data center (where seismic data is commonly archived). This one-day data set is to provide glaciologists with ready access to a good example of IHT that they can use for teaching and for demonstration purposes. Data are available in comma-delimited ASCII format and Matlab native mat files. Data are available via FTP.VIEW RELATED INFORMATIONhttps://doi.org/10.7265/N5445JD6DocumentationGET DATAhttp://www.usap-dc.org/view/dataset/609349Get External DataPROJECT HOME PAGEhttp://nsidc.org/agdc/index.htmlAntarctic Glaciological Data Center Web siteVIEW RELATED INFORMATIONhttp://nsidc.org/data/nsidc-0347.htmlContinuous GPS (static) Data from the Ross Ice Shelf, AntarcticAMD/USCEOS IDN DIFVERSION 9.92008-10-012023-05-23NSIDCVersion SummaryNSIDCMinor VersionNSIDCCurrent Version1NSIDCFull Dataset CitationMacAyeal, D. R., E. Okal, R. Aster, and J. Bassis. 2008. <i>Iceberg Harmonic Tremor, Seismometer Data, Antarctica.</i> [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center. <a href="https://doi.org/10.7265/N5445JD6">https://doi.org/10.7265/N5445JD6</a>. [Date Accessed].NSIDCRetiredfalse