Pattern of greenhouse gas emission from a Prairie Pothole agricultural landscape in Manitoba, Canada
Bibliographic record
Abstract
To obtain accurate N 2 O and CH 4 emission estimates from the Prairie Pothole Region of North America, knowledge of landscape pattern and soil factors is important. A field study was conducted investigating the temporal and spatial variation in N 2 O and CH 4 emissions from spring to fall 2005 and spring-thaw to post-fertilizer application period 2006 using static-vented chambers located at upper, middle and lower landscape elements planted to spring wheat in 2005 and flax in 2006 and riparian areas in an undulating terrain in southern Manitoba. N 2 O was emitted during spring-thaw and post-fertilizer application periods for cropped positions and CH 4 was emitted about 7 wk after soil thaw for lower and riparian elements. While there was no statististical difference in N 2 O emission from upper, middle and lower landscape elements, there was greater occurrence of N 2 O emission hotspots at the lower element, associated with its comparatively higher soil moisture and carbon availability. A location of intense CH 4 emission in a riparian area had considerably less soil sulfate compared with other riparian locations. We conclude that hotspots for N 2 O and CH 4 emission within the landscape are localized and driven by high soil moisture and C availability, and riparian areas should be identified separately from cropped areas, as their N 2 O and CH 4 emissions are lower and higher, respectively. Riparian areas having high sulfate concentrations do not seem to emit appreciable amounts of CH 4 .Key words: Greenhouse gas emission, landscape element, landscape variability, methane, nitrous oxide, Prairie Pothole Region, sulfate
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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 | 0.000 | 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 | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".