Data · dataset · 2026
Latitudinal double-peak structure of stationary planetary wave 1 in the Austral winter middle atmosphere and its possible generation mechanism
Listed in National Center for Atmospheric Research
We report a hitherto unknown latitudinal double-peak structure in the amplitude of stationary planetary wave 1 (SPW1) geopotential height in the stratosphere and lower mesosphere during austral winter.
Description
The primary peak is located at 60-70 degrees S and 30-40 km, and the secondary peak is at 30-50 degrees S and 40-60 km. According to 36 years (1981-2016) of the Modern-Era Retrospective analysis for Research and Applications, version 2, reanalysis data, the double-peak structure occurs with frequencies of similar to 61%, 97%, 53%, and 25% in May, June, July and August, respectively, while it rarely exists in other seasons.
Significant downward Eliassen-Palm fluxes suggestive of downward-propagating waves are often found above the secondary peak, and phase progressions show opposite directions on its two sides. From the free-running Whole Atmosphere Community Climate Model and linear mechanistic model simulations, the secondary peak is likely generated by the interference of primary upward-and secondary downward-propagating SPW1 excited in situ by gravity wave forcing in the upper mesosphere.
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The strengths of the primary and secondary waves need to be comparable to form an effective interference pattern, which may explain the missing double-peak feature in boreal winter as the primary waves are too dominant. Summer-to-winter interhemispheric wave coupling is identified in the austral midwinter and appears to originate from the secondary SPW1 generated in the summer hemisphere. Since the double-peak structure of SPW1 is sensitive to the mean wind, wave-mean flow, and wave-wave interactions, this study provides a reference for general circulation and mechanistic models to simulate the middle atmosphere wave dynamics in austral winter.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d7kw5k1r ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/latitudinal-double-peak-structure-of-stationary-planet… ↗
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=cd286d9b-9b63-447e-a760-9048c42ab… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
- Inferred from text
- Climate model simulation 65% · Tropospheric and stratospheric physics 79%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | cd286d9b-9b63-447e-a760-9048c42ab651 | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:field:370109 | enrichment · data ucar edu | taxonomy-embedding@1.1.0 | title+keywords+description (79%) |
| 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 | |
| concepts[method].local:method:climate-model | enrichment · data ucar edu | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |