Data · collection
The Role of Katabatic Outflow in Maintaining the Upper Level Antarctic Winter Vortex
Listed in NASA Earthdata CMR
The data set associated with this project is a long simulation from a global climate model, with data saved every 6 hours.
Description
Also part of the simulated atmospheric data in the project is the results of sensitivity studies which were designed to assess the impact of changes in Antarctic katabatic flow. Among these are simulated data with enhanced surface friction, and with the removal of Antarctic topography.
From the abstract of the referenced paper: The results of some published studies have been interpreted to suggest that transports associated with the intense katabatic flow field over the Antarctic continent are important factors influencing the development of the upper level winter vortex over the continent. Some of these studies have been rather simplistic and their results may have been taken out of context. We have undertaken some experiments with a model which includes the effects of many feedbacks and synoptic forcing.
Read the rest (2 more)
In this model we have artificially weakened the katabatic flow and assessed the impact on the upper-level vortex. We have effected this weakening by: 1) 'removing' the Antarctic topography, and 2) increasing the surface momentum drag coefficient over Antarctica. We find a weakened upper-level vortex circulation in the no-topography experiment but a strengthened vortex in the increased drag experiment.
The difference in response can be traced to the nature of the reaction of the tropospheric thermal field. Our results indicate that there is no simple, unambiguous relationship between the strength of the katabatic flow and the depth of the upper-level vortex.
Links
Documentation and papers
- data.aad.gov.au /aadc/portal/download_file.cfm?file_id=2339 ↗
Download point for the pdf abstract - AAD Staff Only
documentation · from NASA CMR
- data.aad.gov.au /aadc/metadata/citation.cfm?entry_id=ASAC_692 ↗
Citation reference for this metadata record and dataset
documentation · from NASA CMR
- Public information for ASAC project 692 secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=692 ↗
project · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214306613-AU_AADC.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214306613-AU_AADC.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- General Circulation Model · Surface Winds · Upper Level Winds
- Inferred from text
- Climate model simulation 65% · Simulation 75%
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214306613-AU_AADC | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-winds/surface-winds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-winds/upper-level-winds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[method].local:method:climate-model | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[method].local:method:simulation | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:gcm | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |