Data · dataset · 2026
Bridging the gap: Capturing the Lyα counterpart of a type-II spicule and its heating evolution with VAULT2.0 and IRIS observations
Listed in National Center for Atmospheric Research
We present results from an observing campaign in support of the VAULT2.0 sounding rocket launch on 2014 September 30.
Description
VAULT2.0 is a Lya (1216 A) spectroheliograph capable of providing spectroheliograms at high cadence. Lya observations are highly complementary to the IRIS observations of the upper chromosphere and the low transition region (TR) but have previously been unavailable.
The VAULT2.0 data provide new constraints on upper-chromospheric conditions for numerical models. The observing campaign was closely coordinated with the IRIS mission. Taking advantage of this simultaneous multi-wavelength coverage of target AR 12172 and by using state-of-the-art radiative-MHD simulations of spicules, we investigate in detail a type-II spicule associated with a fast (300 km s(-1)) network jet recorded in the campaign observations.
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Our analysis suggests that spicular material exists suspended high in the atmosphere but at lower temperatures (seen in Lya) until it is heated and becomes visible in TR temperatures as a network jet. The heating begins lower in the spicule and propagates upwards as a rapidly propagating thermal front. The front is then observed as fast, plane-of-the-sky motion typical of a network jet, but contained inside the pre-existing spicule.
This work supports the idea that the high speeds reported in network jets should not be taken as real mass upflows but only as apparent speeds of a rapidly propagating heating front along the pre-existing spicule.
Links
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- Publisher page n2t.org/ark:/85065/d7k93b7x ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/bridging-the-gap-capturing-the-lyi-counterpart-of-a-ty… ↗
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=948bf8f9-dc2f-4b3a-bd73-80bbbbd07… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 948bf8f9-dc2f-4b3a-bd73-80bbbbd07c50 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| 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 |