Electrical Conductivity of Aqueous NaCl at High Pressure and Low Temperature: Application to Deep Subsurface Oceans of Icy Moons
Bibliographic record
Abstract
Abstract Sodium chloride (NaCl) may be an antifreeze in subsurface oceans of icy moons, so its electrical conductivity provides information on properties and processes complementing models of internal structure. We conducted experimental measurements of electrical conductivity of aqueous NaCl (NaCl(aq)) at 212–1,713 MPa and 233–295 K in a multianvil press, simulating high‐pressure and low‐temperature (HPLT) conditions of the subsurface oceans of icy moons such as Titan and Ganymede. A numerical model is proposed with , where σ is the conductivity (S/m), T the temperature (K), c* the NaCl(aq) molality (mol/kg), ρ the water density (g/cm 3 ), ρ 0 the NaCl(aq) density at standard condition (g/cm 3 ), Λ 0 is the limiting equivalent conductance (S cm 2 equiv −1 ). We used this to generate conductivity distributions over a wide range of HPLT and at different concentrations. Significantly high electrical conductivity and large temperature sensitivity allow our data to provide useful experimental reference for future flyby observations.
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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 | 0.001 |
| 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) | 0.000 | 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".