Data report: carbon stable isotope ratios of dissolved inorganic carbon in interstitial waters from IODP Expedition 303 Sites U1305, U1306, and U1307 (Eirik Drift)
Bibliographic record
Abstract
In this data report, we present carbon stable isotope (δ 13 C) analyses of dissolved inorganic carbon (DIC) in interstitial water samples from Integrated Ocean Drilling Program Expedition 303 Sites U1305, U1306, and U1307 on the Eirik Drift in the Labrador Sea.A total of 84 interstitial water samples extracted on board were analyzed postcruise in this study.The low-to intermediate-resolution (from ~3 to 30 m interval) data allow us to identify downhole trends in δ 13 C DIC .Our results show a downhole decreasing trend in δ 13 C DIC in the upper ~50-80 meters below seafloor (mbsf) at the three sites studied.The most depleted δ 13 C DIC values occur at 51.4, 85.8, and 79.2 mbsf at Sites U1305, U1306, and U1307, respectively.Below the depths of δ 13 C DIC minima, δ 13 C DIC values generally increase toward the bottom of the cored interval. Methods and materialsSamples for interstitial waters were extracted from either (1) 5 cm long whole-round sediment sections that were cut and capped immediately after core retrieval on deck or (2) small plug sediment samples of ~10 cm 3 taken with a syringe from the ends of cut sections, also immediately after core retrieval.In the shipboard laboratory, whole-round sediment samples were removed Chapter
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".