Ice wedge degradation and CO2 and CH4 emissions in the Tuktoyaktuk Coastlands, NT
Bibliographic record
Abstract
Increases in ground temperature make soil organic carbon in permafrost environments highly vulnerable to release to the atmosphere. High-centred polygonal terrain is a form of patterned ground that may act as a large source of carbon to the atmosphere because thawing ice wedges can result in increased ground temperatures, soil moisture, and thaw depth. To evaluate the effect of ice wedge degradation on carbon flux, carbon emissions were characterized at two polygonal peatlands in the Tuktoyaktuk Coastlands in northern Canada. Opaque chambers were used to measure CO2 and CH4 emissions from nine nondegraded polygon centres and nine moderately degraded troughs four times during the growing season. To measure emissions from 10 ponds resulting from severe ice wedge degradation, wind diffusion models were used to characterize fluxes using CO2 and CH4 concentration measurements made in each pond. Our field data show that degraded troughs had increased ground temperature, deeper active layers, and increased CO2 and CH4 emissions. Our study shows that rates of CO2 and CH4 emissions from high-centreed polygonal terrain are likely to increase with more widespread melt pond formation in this terrain type.
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How this classification was reachedexpand
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 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".