Field validation of a novel passive air sampler and monitoring of semivolatile organic pollutants in the remote marine and continental boundary layer
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Passive air sampling allows spatially high resolved study designs and access to truly remote sites, but determination of the sampling efficiency, especially that of the particulate phase remains challenging. In this work, we present a self-directional passive air sampler which relies on the Venturi principle to enhance the sample air flow and to efficiently collect the air gas and particulate phases. Sample air flow rates ranged 1–13 m 3 d −1 depending on wind speed. The sampler was validated by side-by-side sampling with active air samplers at a central European continental site and a Caribbean coastal site. The sampler is found suitable for monitoring organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) at trace concentrations in the remote environment (mostly 0.1–1 pg m −3 concentration range). For some OCPs these levels are among the lowest concentrations in air ever reported. The vertical distribution of polycyclic aromatic compounds, OCPs and PCBs at the rural continental site is found determined by advection in the planetary boundary layer during most seasons. • Passive air sampler with enhanced sample air flow. • Vertical distribution of POPs at continental site determined by long-range transport. • Extremely low cyclodiene pesticides levels measured in marine background air.
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.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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) | 0.000 | 0.000 |
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 it