Mobile Ocean Bottom Seismometer Instrument (MOBSI) data from Arctic rivers, lakes, and seas
Creators
- 1. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
- 2. GFZ German Research Centre for Geosciences, Section Geophysical Imaging, Potsdam, Germany
- 3. Geological Survey of Canada, Natural Resources Canada, Sidney, Canada
- 4. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany; Institute of Geosciences, University of Potsdam, Potsdam, Germany
Description
We collected the data using the Mobile Ocean Bottom Seismic Instrument (MOBSI). The MOBSI is portable (9 kg) and consists of a water tight, heavy-duty pressure housing (diameter 35 cm, height 30 cm) containing a three-component, broad-band seismic sensor. There are three channels (two horizontal and one vertical) recorded by the built-in data logger to monitor ambient seismic noise. Deployed by a steel cable from a small boat or zodiac, the device was lowered to the bottom of the water bodies or top of the beach area (if present). The device recorded ambient seismic noise for a few minutes before being retrieved and moved to a new location. The steel cable was outfitted with a communications cable, which allowed for live data analysis and quality control via a shipboard monitor. This insured that the tilt of the instrument was correct (less than 5 degrees) and that the deployment time was sufficient. We stopped data collection until the "real-time" H/V ratio was stable, i.e., not changing with time. For all soundings, the sampling frequency was set to 100 samples per second. The MOBSI data was recorded in an internal RAW format that was converted to miniSEED format. In this dataset, we present MOBSI data in miniSEED format for seven survey lines from the Russian and Canadian Arctic. Each sounding contains three channels. The "pri0" extension represents the vertical channel and the "pri1" and "pri2" extensions represent the horizontal channels. The Banja Lake and Lena River profiles are situated in the Lena Delta, northeastern Siberia, Russia. Ivashkina Lagoon is located along the southern coastline of the Bykovsky Peninsula, northeastern Siberia, Russia. The Tuktoyaktuk profiles are located north of Tuktoyaktuk Island (Northwest Territories, Canada) in the Canadian Beaufort Sea. The survey lines presented in this manuscript are the following:
Profile A-A' (Banja Lake): 8 soundings
Profile B-B' (Banja Lake): 9 soundings
Profile C-C' (Banja Lake): 9 soundings
Profile D-D' (Lena River - Samoylov Island): 10 soundings
Profile E-E' (Lena River - Chay-Tumus): 16 soundings
Profile H-H' (Ivashkina Lagoon): 20 soundings
Profile F-F' (Tuktoyaktuk): 10 soundings
Profile G-G' (Tuktoyaktuk): 9 soundings
The Excel file "MOBSI_soundings.xlsx" provides an overview of all the soundings, whereby each tab is split by the survey line. The latitude, longitude, water depth, and recording time for each sounding is provided.
Files
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The dataset is part of a manuscript (in review) submitted to the Journal of Geophysical Research (Earth Surface). Once the review process is complete, we will make the data publicly available. During the review process, only the journal and reviewers are granted access to the data.
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