Data · collection
US Joint Global Ocean Flux Study (JGOFS) sediment samples
Listed in NASA Earthdata CMR
This data set contains concentrations of naturally-occurring radionuclides (U-238, U-234, Th-230, Th-232, Pa-231 and Be-10) in marine sediments.
Description
Concentrations of U-series nuclides were measured by isotope dilution inductively-coupled mass spectrometry. Concentrations of Be-10 were measured by accelerator mass spectrometry.
The data set also contains sediment lithology (% biogenic opal, determined by colorimetric spectrophotometry; % calcium carbonate, determined by coulometry; % organic carbon, determined by high-temperature combustion; and % lithogenic material, estimated by difference and independently from the concentration of Th-232, an element contained entirely in lithogenic phases). Radiocarbon dates, obtained by accelerator mass spectropmetry, used to constrain the chronologies of the cores are included as well.
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Sediment cores were collected as part of the US Joint Global Ocean Flux Study (JGOFS) Antarctic Environment and Southern Ocean Process Study (AESOPS). Cores were collected along 170 degrees West, between approximately 54 degrees S and 66 degrees S, during a cruise aboard the RVIB Nathaniel B Palmer in February-April, 1998 (NBP9802). The study was designed to compare biological productivity of the region during the Last Glacial Maximum with conditions that exist today.
Links
Get the data
- U.S. JGOFS Southern Ocean (AESOPS) Data usjgofs.whoi.edu/southernobjects.html ↗
download · from NASA CMR
- usjgofs.whoi.edu /jg/dir/jgofs/southern/nbp98_2 ↗
Data sets for RVIB Nathaniel B Palmer February-April, 1998, cruise
download · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214612310-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214612310-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Age Determinations · Isotopes · Isotopes · Mineraloids · Minerals · Not provided · Radiocarbon · Sediment Chemistry · Sediment Composition · Sediments · Sediments
- Inferred from text
- Geochemistry 74% · Mass spectrometry 75%
Provenance · 1 source records, 19 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214612310-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3703 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (74%) |
| concepts[measured_variable].gcmd:earth-science/oceans/marine-sediments/sediment-chemistry | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/marine-sediments/sediment-composition | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/paleoclimate/ocean-lake-records/isotopes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/paleoclimate/ocean-lake-records/radiocarbon | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/paleoclimate/ocean-lake-records/sediments | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/geochemistry/geochemical-properties/isotopes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/rocks-minerals-crystals/age-determinations | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/rocks-minerals-crystals/minerals | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/rocks-minerals-crystals/minerals/mineraloids | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/rocks-minerals-crystals/sediments | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:mass-spectrometry | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |