Schlindwein, Vera; Kirk, Henning; Hiller, Marc; Scholz, John-Robert; Schmidt-Aursch, Mechita (2022): Project GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947045
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Abstract:
Gakkel Deep is a pilot project that installed a network of four broadband ocean bottom seismometers (OBS) near Gakkel Deep, the deepest depression in the Arctic Ocean, at the eastern end of the ultraslow spreading Gakkel Ridge. The area is covered year-round by sea ice. In order to enable a safe recovery of the OBS in a sea ice covered ocean, the OBS were modified to include a positioning system that allows to track the instruments at meter accuracy during descent and ascent and when stuck beneath ice floes.
This pilot studied aimed at testing the recovery procedure of the OBS, checking the performance of the modified instrument design, getting an overview of ambient seismic noise at the bottom of the Arctic Ocean and at contributing to a better understanding of the origin of the Gakkel Deep depression with more than 3000 m of topography. The network is shaped as a rectangle with 8 km and 10 km side length and is centered at about 82°N 119.5°E at water depths between 3600 m and 4100 m. It is positioned slightly to the east of the present plate boundary in an area with volcanic structures.
Instruments from the German Instrument Pool of Amphibian Seismology (DEPAS) were deployed during RV Polarstern cruise PS115/2 on September 15, 2018. Instrument recovery was completed during RV Polarstern cruise PS122/1 on September 27, 2019. The data set contains about 377 days of continuous records at 250 Hz sample rate. The station locations were determined with Ultra Short Baseline (USBL) ranging, the accuracy is approx. 10 m.
Related to:
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung; et al. (2017): DEPAS (Deutscher Geräte-Pool für amphibische Seismologie): German Instrument Pool for Amphibian Seismology. Journal of large-scale research facilities JLSRF, 3, https://doi.org/10.17815/jlsrf-3-165
Rex, Markus (2020): Links to master tracks in different resolutions of POLARSTERN cruise PS122/1, Tromsø - Arctic Ocean, 2019-09-20 - 2019-12-13 (Version 2). Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.924668
Schlindwein, Vera; Kirk, Henning; Hiller, Marc; Scholz, John-Robert; Schmidt-Aursch, Mechita (2022): GAKKELDEEP: DEPAS ocean-bottom seismometer operations at the Gakkel Ridge in 2018-2019. GFZ Data Services. Other/Seismic Network, https://doi.org/10.14470/3S7563492742
Stein, Ruediger (2018): Links to master tracks in different resolutions of POLARSTERN cruise PS115/2, Longyearbyen - Bremerhaven, 2018-09-05 - 2018-10-16. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.895773
Stein, Ruediger (2019): The Expedition PS115/2 of the Research Vessel POLARSTERN to the Arctic Ocean in 2018. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 728, 249 pp, https://doi.org/10.2312/BzPM_0728_2019
Coverage:
Median Latitude: 82.011750 * Median Longitude: 119.531650 * South-bound Latitude: 81.956000 * West-bound Longitude: 119.287200 * North-bound Latitude: 82.069300 * East-bound Longitude: 119.770900
Date/Time Start: 2018-09-15T04:55:00 * Date/Time End: 2019-09-27T22:40:00
Minimum ELEVATION: -4089 m a.s.l. * Maximum ELEVATION: -3633 m a.s.l.
Event(s):
8F_GKD01 (PS115/2_5-1, PS122/1_2-22) * Latitude: 82.063100 * Longitude: 119.287200 * Date/Time Start: 2018-09-15T07:24:00 * Date/Time End: 2019-09-27T02:52:00 * Elevation: -4089.0 m * Location: Gakkel Ridge, Arctic Ocean * Method/Device: Ocean bottom seismometer (OBS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Schlindwein, Vera | |||
| 2 | Optional event label | Event 2 | Schlindwein, Vera | |||
| 3 | Project | Project | Schlindwein, Vera | |||
| 4 | Principal investigator | PI | Schlindwein, Vera | |||
| 5 | Code | Code | Schlindwein, Vera | FDSN Network Code | ||
| 6 | Station label | Station | Schlindwein, Vera | |||
| 7 | Date/time start | Date/time start | Schlindwein, Vera | Recording | ||
| 8 | Date/time start | Date/time start | Schlindwein, Vera | Deployment | ||
| 9 | LATITUDE | Latitude | Schlindwein, Vera | Geocode | ||
| 10 | LONGITUDE | Longitude | Schlindwein, Vera | Geocode | ||
| 11 | ELEVATION | Elevation | m a.s.l. | Schlindwein, Vera | Geocode | |
| 12 | Date/time end | Date/time end | Schlindwein, Vera | Recovery | ||
| 13 | Date/time end | Date/time end | Schlindwein, Vera | Recording | ||
| 14 | Clock skew | Skew | µs | Schlindwein, Vera | ||
| 15 | Recorder type | Recorder | Schlindwein, Vera | |||
| 16 | Recorder, serial number | Recorder SN | Schlindwein, Vera | |||
| 17 | Seismometer type | Seismometer | Schlindwein, Vera | |||
| 18 | Seismometer, serial number | Seismometer SN | Schlindwein, Vera | |||
| 19 | Seismometer gain | Seismometer gain | Schlindwein, Vera | |||
| 20 | Hydrophone type | Hydrophone | Schlindwein, Vera | |||
| 21 | Hydrophone, serial number | Hydrophone SN | Schlindwein, Vera | |||
| 22 | Hydrophone gain | Hydrophone gain | Schlindwein, Vera | |||
| 23 | Hydrophone polarity | Hydrophone pol | Schlindwein, Vera | |||
| 24 | Sampling rate | Sampling rate | Hz | Schlindwein, Vera | ||
| 25 | Cruise/expedition | Expedition | Schlindwein, Vera | |||
| 26 | Comment | Comment | Schlindwein, Vera | |||
| 27 | Binary Object | Binary | Schlindwein, Vera | Auxiliary data) | ||
| 28 | Binary Object | Binary | Schlindwein, Vera | Log file | ||
| 29 | Binary Object | Binary | Schlindwein, Vera | Raw data | ||
| 30 | Binary Object | Binary | Schlindwein, Vera | Seismometer state of health |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
100 data points