Stephens, Mark (2022): Beryllium-7 concentrations in ice during the MOSAiC expedition [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945408, 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:
Ice cores were collected using a Kovacs Mark II 9 cm diameter corer (area = 63.62 cm2). We generally took three ice cores (total sample area = 190.85 cm2, 11 samples) from a site and combined them into one sample. Snow was swept away from the ice surface before drilling through the ice column. Once recovered, cores were laid out on a cradle to measure length (ice thickness) and then put in a plastic sleeve before being transported to Polarstern. After placing the cores in buckets, we added the following solutions: 5 ml hydrochloric acid, 2 ml iron chloride solution, and 1 ml of 1000 ppm stable beryllium AA standard (chemical yield tracer). After melting at room temperature, the water volume was measured using a graduated cylinder. Next, the sample was precipitated using ammonium hydroxide. After allowing the precipitate to settle, excess water was removed by decanting and centrifugation. The samples were transferred to petri dishes and placed in an oven for drying, and then analyzed with a high purity germanium (HPGe) gamma detector (Be-7 peak at 478 keV). The detector is calibrated by using a commercially prepared mixed isotope solution added to iron hydroxide powder in a petri dish (same geometry as samples). After gamma counting, samples were brought up to 1 liter in 1% nitric acid solution. The beryllium concentrations (for chemical yield determination) were then obtained using a Perkin Elmer Optima 7300 DV ICP-OES. Our chemical yields averaged over 80%.
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: 86.382692 * Median Longitude: 82.176217 * South-bound Latitude: 83.906280 * West-bound Longitude: 14.312010 * North-bound Latitude: 88.112410 * East-bound Longitude: 126.144700
Date/Time Start: 2019-10-28T12:00:00 * Date/Time End: 2020-05-04T12:00:00
Minimum Elevation: -4424.6 m * Maximum Elevation: -2704.1 m
Event(s):
PS122/1_5-3 * Latitude: 85.553402 * Longitude: 126.362183 * Date/Time: 2019-10-28T02:29:00 * Elevation: -4379.5 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: temp: be1; salo18: s18; CH4: CH4; HAlO: halo; iso: iso; bromo: bromo; CHLA: eco1a; Prod: eco1b; pigs: eco1c; algae: eco1d; Be2: Be2; DIC/TA: DIC; Be3: be3; Tex: tex; DNA1: eco2a; DNA2: eco2b; RNA: eco2c; PLASTic: PLT; REPository: REP; backup: bac; meio1: meio1
PS122/1_6-34 * Latitude: 85.943718 * Longitude: 120.247440 * Date/Time: 2019-11-04T01:48:00 * Elevation: -4407.3 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: FYI, TEMP: temperature, then Be1, 20191104-PS122-1_6-FYI-T; FYI, CH4; FYI, SALO18, 20191104-PS122-1_6-FYI-SALO18, original FloeNavi record: LAT 85.934141 LONG 120.357904; FYI: HALO; FYI, ECO1B: PROD, 20191104-PS122-1_6-FYI-PROD; FYI, ECO1A: CHLA, 20191104-PS122-1_6-FYI-CHLA; FYI, ECO1D: ALGAE, 20191104-PS122-1_6-FYI-ALGAE; FYI, ECO1C: PIGS, 20191104-PS122-1_6-FYI-PIGS; FYI, ISO; FYI, BROMO; FYI, Texture, 20191104-PS122-1_6-FYI-TEX; FYI: ECO2A: DNA1, 20191104-PS122-1_6-FYI-DNA1; FYI, ECO2B: DNA2, 20191104-PS122-1_6-FYI-DNA2; FYI, ECO2C: RNA, 20191104-PS122-1_6-FYI-RNA; MEIO1, bottom 10 cm only, 20191104-PS122-1_6-FYI-MEIOI; FYI, REPository, 20191104-PS122-1_6-FYI-REP; FYI, backup, 20191104-PS122-1_6-FYI-BAC; FYI, DIC, 20191104-PS122-1_6-DIC; MEIO2, bottom 10 cm only, 20191104-PS122-1_6-FYI-MEIO2, original FloeNavi record: LAT 85.937749 LONG 120.264249; FYI, BE2; FYI, BE3, original FloeNavi record: LAT 85.938242 LONG 120.249547; FYI, MethanOX, 20191104-PS122-1_6-FYI-MethOX, original FloeNavi record: LAT 85.938386 LONG 120.245194; FYI, Gypsum, 20191104-PS122-1_6-FYI-GYP, original FloeNavi record: LAT 85.938405 LONG 120.244597
PS122/1_7-6 * Latitude: 85.871057 * Longitude: 116.273187 * Date/Time: 2019-11-11T02:52:00 * Elevation: -4413.1 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: T: temperature FYI; ECO1A: CHLA; ECO1B: PROD; FYI; S18: FYI; ECO1D: ALGAE, FYI; ECO1C: PIGS; BY2: FYI; BAC: Backup FYI; ECO2A: DNA1; ECO2B: DNA2, FYI; TEX: FYI; ECO2C: RNA, FYI; DIC: FYI; REP: FYI; MEI01: FYI; MEO2: FYI; MEI03: FYI; METHOX: FYI
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 | Site | Site | Stephens, Mark | MOSAiC site name | ||
| 5 | LATITUDE | Latitude | Stephens, Mark | Geocode | ||
| 6 | LONGITUDE | Longitude | Stephens, Mark | Geocode | ||
| 7 | Ice thickness | Ice thick | m | Stephens, Mark | ||
| 8 | Depth, top/min | Depth top | m | Stephens, Mark | ||
| 9 | Depth, bottom/max | Depth bot | m | Stephens, Mark | ||
| 10 | Sample area | Sample area | m2 | Stephens, Mark | ||
| 11 | Sample volume | Samp vol | m3 | Stephens, Mark | ||
| 12 | Beryllium-7 | 7Be | Bq/m3 | Stephens, Mark | Gamma spectrometry | |
| 13 | 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:
187 data points