Cryo‐Hydrogeological Characteristics and Configuration of a Stream‐Talik System in a Discontinuous Permafrost Environment on the Qinghai‐Tibet Plateau
Bibliographic record
Abstract
ABSTRACT A comprehensive approach including ground temperature, surface temperature, and hydraulic head monitoring along with electrical resistivity tomography (ERT) surveys was used to investigate the cryo‐hydrogeological characteristics of a complex stream‐talik system in a discontinuous permafrost environment on the Qinghai‐Tibet Plateau (QTP). Insulating properties of the flowing stream water enhance ground heat storage beneath the stream, which significantly delays the freezing of the underlying streambed in fall and early winter. Moreover, discharge of pressurized groundwater in the talik leads to icing, which thickens and spreads during the winter and acts as a thermal buffer. Due to these warm thermal conditions of the streambed, ground temperatures remained above 0 °C at depth all year round, the contours of which delineate a 2‐m‐thick talik beneath the streambed. Moreover, a supra‐permafrost talik and a through‐permafrost talik were identified as zones of low electrical resistivity in the electrical resistivity models derived from the inversion of the ERT data along two survey lines. As it follows the variable width of the stream channel in a warm permafrost environment, the underlying talik develops a complex 3D structure with changing cross‐sectional areas, lying either above or sporadically extending completely through the permafrost. Additionally, where permafrost underlies the talik, temperatures within the talik remain higher than −0.22 °C, which thus remains somewhat permeable, allowing groundwater flow. This stream‐talik and permafrost system creates complex cryo‐hydrogeological responses that can impact local water supply and ecosystem stability.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".