Bibliographic record
Abstract
The expedition 64PE474 aboard RV Pelagia started on the 18th of July 2021, leaving from Reykjavik (Iceland), half a day later than initially planned owing to delayed luggage that also contained essential equipment for the expedition. The expedition ended on August 16th 2021, also in Reykjavik (Iceland). During the expedition, samples were taken using several systems. The ‘Titan’ ultraclean CTD sampling system (UCC) for trace metal collection (De Baar, et al. 2008), mounted with pristine large volume samplers (Rijkenberg, et al. 2015), was used the most as part of the trace metal focal point of the expedition. The large volume Pristine samplers were made from polypropylene to allow sampling for light sensitive phytoplankton. After deployment, the complete CTD sampling system was placed in a cleanroom environment inside a modified high cube shipping container where subsamples were collected for trace metals, isotopes, ligands, and various auxiliary parameters (see section 2.4). The other deployed instruments included a conventional CTD rosette system (CTD), a multi-corer (MUC) to collect sediment cores from which samples were taken for both sediments and porewaters, and a novel bottom gradient sampler (BGS) to sample dissolved and particulate trace metals close to the seafloor. Overall, 38 full depth stations were sampled with in total 38 UCC casts, 14 CTD casts, 19 BGS casts, and 13 MUC casts. Additionally, 2 shallow stations (station 4 and 26) were occupied to collect surface water to start the planned bioassays. During the expedition, 2 large, 6-day bio-assays were conducted (see section 2.5) to investigate the influence of Fe concentrations and temperature on phytoplankton biomass and composition. Another 2-day bioassay was also carried out to further investigate the influence of Fe and ammonium on phytoplankton productivity and composition. For these bioassays, 2 large custom-built temperature-controlled incubators where used that were place on the deck in front of the bridge of RV Pelagia where irradiance was mostly unobstructed. Additionally, 32 smaller bioassays were conducted by Willem Poll’s group at controlled temperature and irradiance levels inside a climate-controlled container laboratory on Pelagia.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.004 | 0.004 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.162 | 0.110 |
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".