Data · dataset · 2026
Resolving the high-latitude ionospheric irregularity spectra using multi-point incoherent scatter radar measurements
Listed in National Center for Atmospheric Research
To provide new insights into the relationship between geomagnetic conditions and plasma irregularity scale-sizes, high-latitude irregularity spectra are computed using a novel Incoherent Scatter Radar (ISR) technique.
Description
This new technique leverages: (a) the ability of phased array Advanced Modular ISR (AMISR) technology to collect volumetric measurements of plasma density, (b) the slow F-region cross-field plasma diffusion at scales greater than 10 km, and (c) the high dip angle of geomagnetic field lines at high-latitudes.
The resulting irregularity spectra are of a higher spatiotemporal resolution than what has been previously possible with ISRs. Spatial structures as small as 20 km are resolved in less than 2 minutes (depending on the radar mode). In this work, we focus on Resolute Bay ISR-North (RISR-N) observations operating in the "imaginglptight" mode.
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In addition to having an unprecedented view of the size and occurrence of irregularities as they traverse the polar cap, we find that as the F-region plasma density decreases below approximately 2.5 x 10(10) m(-3) at 350 km altitude the spectral power shifts to scale-sizes lower than 50 km. Additionally, near magnetic local noon, the spectral power shifts to scales greater than 50 km, and from 15 to 6 magnetic local time, the spectral power shifts to scales lower than 50 km.
This reflects the role of photoionization dominating high-latitude ionospheric structuring in the polar cap.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d7qr51w6 ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/resolving-the-high-latitude-ionospheric-irregularity-s… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=6c3546a5-b92d-4256-bef2-6303ef4ac… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Atmospheric sciences 74%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 6c3546a5-b92d-4256-bef2-6303ef4ac29f | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:group:3701 | enrichment · data ucar edu | taxonomy-embedding@1.1.0 | title+keywords+description (74%) |
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |