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Ranked by formulaVerdict: NotableTemperature sensitivity of snow viscoplasticity: Evidence from controlled creep experiments
VerdictWorth a reader's time today.
Abstract
Abstract. Snow is a warm, porous material whose densification under its own weight is highly temperature-dependent. Despite decades of research, reported activation energies for snow viscoplasticity remain highly scattered, ranging from 40 to 600 kJ mol-1. We quantified the temperature dependence of snow viscoplasticity using in-tomograph creep experiments with a newly developed thermo-mechanical cell. This design allows accurate load and temperature control, micrometric displacement measurement, and microstructural evolution monitoring via X-ray tomography. To disentangle microstructural evolution and temperature effects on the compression rate, we used a state-of-the-art viscoplastic model. We conducted five experiments on centimetre-scale samples of decomposing and fragmented precipitation particles with initial densities ranging from 278 to 320 kg m-3 under an applied stress of 1.25 kPa. Each experiment comprised five temperature steps from -6 to -18°C, each lasting one day, and resulted in a mean final vertical strain of 4%. We show that the viscoplastic response follows a two-regime Arrhenius law, with activation energies Qh = 126 ± 6 kJ mol-1 for temperatures above -13 ± 1°C and Ql = 51 ± 18 kJ mol-1 below. This temperature sensitivity matches that reported for polycrystalline ice but is greater than that used in detailed snowpack models.
The editor's rubric
| Dimension | Level | Weight | What that level means |
|---|---|---|---|
| Leverage | ███░░ 3 | 16% | A method or resource many groups across the field will adopt within a year. |
| Magnitude | ███░░ 3 | 20% | Large gain: roughly 2x, or a clear new state of the art on a hard, unsaturated problem. |
| Evidence | ███░░ 3 | 20% | Solid: multiple benchmarks or cohorts, ablations, fair baselines, released code or data. |
| Novelty | ███░░ 3 | 10% | A genuinely new approach to an open problem. |
| Trajectory | ██░░░ 2 | 14% | Some room to improve with obvious engineering. |
| Stakes | ██░░░ 2 | 20% | Benefits a professional community (practitioners, clinicians, engineers). |
Editor’s rationale
Heuristic triage from title and abstract text only, not a reading of the paper. Cues found: method (we report); gains (state of the art); novelty (open problem); verification (error bars); scale (scalable).
How the score was computed
- Merit
- 5.3 / 10
- Adjusted merit
- 4.5 / 10
- Attention
- 0%
- Freshness
- 85%
- Citations0 (reference 15, via openalex, Oct 14, 2026, 07:30 UTC)