Secondary Gravity Wave Generation Resulting from Mountain Wave Breaking
Abstract
Orographic gravity wave (GW) hotspots have been observed over numerous regions in the stratosphere [e.g. Hoffmann et al., Atmos. Chem. Phys., 2016]. As these orographic GWs dissipate, they generate secondary GWs over multiple scales relating to the size of the dissipation region [Vadas et al., 2003]. Observations from the DEEPWAVE campaign have shown breaking orographic gravity waves from the stratosphere to the mesosphere and lower thermosphere with arising smaller horizontal scales [Bossert et al., 2017], in addition to expected larger horizontal scale secondary GWs. This presentation discusses new modeling and observational efforts to quantify mountain waves and breaking over hotspot regions which include New Zealand and Europe, and the analysis of resulting secondary GW scales and propagation to different altitudes and locations.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMSA51B2735B
- Keywords:
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- 3334 Middle atmosphere dynamics;
- ATMOSPHERIC PROCESSESDE: 3369 Thermospheric dynamics;
- ATMOSPHERIC PROCESSESDE: 3384 Acoustic-gravity waves;
- ATMOSPHERIC PROCESSESDE: 3389 Tides and planetary waves;
- ATMOSPHERIC PROCESSES