Features of magnetosphere-ionosphere coupling during breakups and substorm onsets inferred from multi-instrument alignment
Bibliographic record
Abstract
We consider a sequence of activations which include pseudo-breakups, small local substorms, and a full substorm using a fortunate multi-instrument coverage between 0300 and 0700 UT on September 15, 2001. For this period of time, there was a radial alignment of GOES, and Cluster (�19 RE) in the near-midnight magnetotail mapped to the Canadian sector covered by the IMAGE field of view along with fully functional hi-resolution photometers, and magnetometers. This allows reasonable featuring of auroral breakup and substorm onset components as they are observed both in the magnetosphere and ionosphere. In this paper, we concentrate on general description and relative timing of the auroral breakup signatures, dipolarization and onset o f Pi pulsations at geostationary orbit, and large (up to 1000 km/s) tailward flows and strong bipolar variations in the cen tral plasma sheet. This paper is meant to complement the accompanying paper (10). In a substorm onset problem, one of the central issues is the inter-scale interactions of various regions. These inc lude processes in the near-Earth plasma sheet (NEPS) and the au- roral intensification and current formation in the ionosphe re, processes in the near-Earth breakup region and in the mid-tail reconnection region, and coupling of the central plasma sheet (CPS) and ionosphere at onset. In studying the essential relations between the substorm on- set components, significant successes have been recently ac hiev- ed in both micro-scale analysis of plasma sheet processes and global picturing of the magnetosphere-ionosphere coupling us- ing multi-instrument alignments. Some observations indicate that onset is an interactive process involving the near-Ear th breakup and mid-tail reconnection. It has been suggested that the near-Earth breakup is associated with some sort of the in- terchange instability, most probably a drift ballooning mode, leading to a current disruption at roughly 6-10 RE, whereas reconnection is presumably a result of the Hall effect in the very thin, and sometimes bifurcated, current sheet at large r ra- dial distances. The most disputed mechanisms of interaction between these two processes, or triggering one another, are rar- efaction or compressional waves propagating from the NEPS to the CPS and earthward bursty flows from the reconnection region to the NEPS. For reference purposes, we overview sev-
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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 | 0.001 | 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) | 0.001 | 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 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".