| _version_ | 1867168506644004864 |
|---|---|
| author | Stephens, Mark |
| author_facet | Stephens, Mark |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_945403 |
| institution | PANGAEA |
| language | en |
| publishDate | 2022 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Beryllium-7 concentrations in seawater during the MOSAiC expedition Stephens, Mark Arctic Ocean; beryllium-7; Beryllium-7; Beryllium-7, error; Central Arctic Ocean; DATE/TIME; DEPTH, water; Event label; Gamma spectrometry; LATITUDE; LONGITUDE; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/2; PS122/2_17-127; PS122/2_18-114; PS122/2_18-115; PS122/2_19-156; PS122/2_20-147; PS122/2_21-147; PS122/2_21-148; PS122/2_22-116; PS122/2_24-27; PS122/2_24-28; PS122/2_25-86; PS122/3; PS122/3_30-24; PS122/3_31-49; PS122/3_31-93; PS122/3_32-19; PS122/3_33-22; PS122/3_34-25; PS122/3_35-54; PS122/3_35-55; PS122/3_36-142; PS122/3_37-91; PS122/3_38-114; PS122/3_38-28; PUMP; Sample ID; Water pump; winter 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. |
| title | Beryllium-7 concentrations in seawater during the MOSAiC expedition |
| topic | Arctic Ocean; beryllium-7; Beryllium-7; Beryllium-7, error; Central Arctic Ocean; DATE/TIME; DEPTH, water; Event label; Gamma spectrometry; LATITUDE; LONGITUDE; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/2; PS122/2_17-127; PS122/2_18-114; PS122/2_18-115; PS122/2_19-156; PS122/2_20-147; PS122/2_21-147; PS122/2_21-148; PS122/2_22-116; PS122/2_24-27; PS122/2_24-28; PS122/2_25-86; PS122/3; PS122/3_30-24; PS122/3_31-49; PS122/3_31-93; PS122/3_32-19; PS122/3_33-22; PS122/3_34-25; PS122/3_35-54; PS122/3_35-55; PS122/3_36-142; PS122/3_37-91; PS122/3_38-114; PS122/3_38-28; PUMP; Sample ID; Water pump; winter |
| url | https://doi.org/10.1594/PANGAEA.945403 |