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Record W3094476405 · doi:10.1021/acs.estlett.0c00758

Dechlorane Plus in the Global Atmosphere

2020· article· en· W3094476405 on OpenAlex

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.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.
aboutThe title or abstract carries a Canadian signal from the geographic lexicon.

Bibliographic record

VenueEnvironmental Science & Technology Letters · 2020
Typearticle
Languageen
FieldEnvironmental Science
TopicToxic Organic Pollutants Impact
Canadian institutionsEnvironment and Climate Change Canada
FundersGovernment of Canada
KeywordsEnvironmental scienceListing (finance)Sampling (signal processing)Atmosphere (unit)Range (aeronautics)Passive samplingAir pollutantsPollutantGeographyAtmospheric sciencesMeteorologyAir pollutionChemistryStatisticsMathematicsPhysicsEngineeringTelecommunicationsBusiness

Abstract

fetched live from OpenAlex

Dechlorane plus (DP) is a high-production volume chlorinated flame retardant, which is under consideration for listing under the Stockholm Convention on Persistent Organic Pollutants. In this study, we provide additional and timely information to help evaluate the spatial and temporal trends and long-range transport potential of DP at 67 sampling sites. The Global Atmospheric Passive Sampling network has been deploying passive air samplers quarterly since 2005. A retrospective analysis of samples from 2005 and 2006 indicates that DP is globally distributed in air with total DP levels ranging from nondetect to 30 pg/m3. The median value at urban sites (∼0.9 pg/m3) was approximately 10 times greater than at background, rural, and agricultural sites. The anti-DP/syn-DP ratio was relatively consistent across most site categories and in the range of values measured in commercial products containing DP. This suggests that both isomers are about equally capable of long-range transport in air. A retrospective analysis for selected sites covering the period of 2005–2011 showed declining levels of DP at urban sites in Paris and Toronto.

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 imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesScience and technology studies, Insufficient payload (model declined to judge)
Consensus categoriesInsufficient payload (model declined to judge)
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.549
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.003
Science and technology studies0.0000.004
Scholarly communication0.0000.000
Open science0.0020.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.002

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.

Opus teacher head0.006
GPT teacher head0.206
Teacher spread0.200 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it