Role of interchange reconnection in convection at small interplanetary magnetic field clock angles and in transpolar arc motion
Bibliographic record
Abstract
When the interplanetary magnetic field (IMF) clock angle θc ≡ atan2(BY, BZ) lies in the range 0° < ∣θc∣ < 30°, there only persist IMF‐lobe and lobe‐closed reconnection (both of which we call interchange‐type), with Dungey‐type reconnection (IMF‐closed and lobe‐lobe) being absent. Reconnection for IMF BY > 0 (BY < 0) occurs in the northern dusk (dawn) quadrant and in the southern dawn (dusk) quadrant. The IMF‐lobe reconnection in one quadrant is coupled to the lobe‐closed reconnection in the other quadrant by magnetic flux reciprocation, and in the ionosphere, that reconnection pair produces an “interchange‐type merging cell” in the hemisphere of IMF‐lobe reconnection and a reciprocal cell in the other hemisphere. When the polar cap is completely divided into two parts by the transpolar plasma sheet (the theta aurora configuration), the interchange‐type merging cell transports open magnetic flux from one part of the polar cap to the other without affecting the theta aurora configuration, causing the dawn‐dusk motion of the transpolar plasma sheet. This type of flux transport is destroyed if any Dungey‐type reconnection occurs. Thus a necessary condition for the theta aurora configuration to be maintained during the dawn‐dusk travel of the transpolar plasma sheet is the absence of Dungey‐type reconnection. This condition is reasonably satisfied for 0° < ∣θc∣ < 30°. The absence of Dungey‐type reconnection in the presence of IMF BY can be understood as a transitional state of the magnetic flux circulation when the IMF rotates from due northward to dawnward or duskward.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 source (direct Gemma or distilled Codex), 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".