Stephens, Mark (2022): Beryllium-7 concentrations in seawater during the MOSAiC expedition [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945403, In: Stephens, M (2022): Beryllium-7 concentrations in snow, ice, seawater, and aerosols during the MOSAiC expedition [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.945414
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Abstract:
Pumps were used to collect seawater within the upper 60 m of the ocean for Be-7analysis. Unfiltered seawater was drawn through a pvc hose to the surface where it was passed through iron-oxide impregnated acrylic fiber filters, which adsorb the Be-7. A flow meter attached in-line to the filter compartment recorded the amount of seawater passed through each filter. To maximize Be-7 collection, two or three fibers filtering approximately 600- 700 L of seawater apiece were collected from each depth and later combined. For the mixed layer samples, water was collected from the ship's seawater intake (~8m) into barrels from which the water was passed through the iron-oxide filters as described above. The fibers were dried and shipped to Florida International University. There, the fibers were ashed, placed in a Marinelli beaker and analyzed with a high purity germanium (HPGe) gamma detector. Be-7 has a readily identifiable gamma peak at 478 keV. The detector is calibrated by adding a commercially prepared mixed solution of known gamma activities to an ashed fiber and counting it in the Marinelli geometry.
Project(s):
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AFMOSAiC-1_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS122_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC
National Science Foundation (NSF), grant/award no. 1753423: Collaborative Research: Defining the Atmospheric Deposition of Trace Elements into the Arctic Ocean-Ice Ecosystem During the Year-Long MOSAiC Ice Drift
Coverage:
Median Latitude: 86.536716 * Median Longitude: 58.082376 * South-bound Latitude: 83.994000 * West-bound Longitude: 12.392300 * North-bound Latitude: 88.496300 * East-bound Longitude: 115.966300
Date/Time Start: 2019-12-21T12:00:00 * Date/Time End: 2020-04-29T12:00:00
Minimum DEPTH, water: 8.0 m * Maximum DEPTH, water: 60.0 m
Event(s):
PS122/2_17-127 * Latitude: 86.688433 * Longitude: 112.410500 * Date/Time: 2019-12-21T12:46:00 * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: PS122/2 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Water pump (PUMP)
PS122/2_18-114 * Latitude: 86.658133 * Longitude: 115.943083 * Date/Time: 2019-12-26T10:41:00 * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: PS122/2 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Water pump (PUMP)
PS122/2_18-115 * Latitude: 86.677950 * Longitude: 115.966267 * Date/Time: 2019-12-27T13:10:00 * Sensor URI: sensor.awi.de * Location: Arctic Ocean * Campaign: PS122/2 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Water pump (PUMP)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Stephens, Mark | |||
| 2 | Sample ID | Sample ID | Stephens, Mark | |||
| 3 | DATE/TIME | Date/Time | Stephens, Mark | Geocode | ||
| 4 | LATITUDE | Latitude | Stephens, Mark | Geocode | ||
| 5 | LONGITUDE | Longitude | Stephens, Mark | Geocode | ||
| 6 | DEPTH, water | Depth water | m | Stephens, Mark | Geocode | |
| 7 | Beryllium-7 | 7Be | Bq/m3 | Stephens, Mark | Gamma spectrometry | |
| 8 | Beryllium-7, error | 7Be e | ± | Stephens, Mark | Gamma spectrometry |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
75 data points