Articles | Volume 16, issue 14
https://doi.org/10.5194/acp-16-9381-2016
https://doi.org/10.5194/acp-16-9381-2016
Research article
 | 
28 Jul 2016
Research article |  | 28 Jul 2016

Stratospheric gravity waves at Southern Hemisphere orographic hotspots: 2003–2014 AIRS/Aqua observations

Lars Hoffmann, Alison W. Grimsdell, and M. Joan Alexander

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Cited articles

AIRS Science Team and Chahine, M.: AIRS/Aqua L1B Infrared (IR) geolocated and calibrated radiances V005, version 005, Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center (GES DISC), available at: http://disc.gsfc.nasa.gov/datacollection/AIRIBRAD_005.html (last access: 31 December 2015), 2007.
Alexander, M. J.: Interpretations of observed climatological patterns in stratospheric gravity wave variance, J. Geophys. Res., 103, 8627–8640, 1998.
Alexander, M. J. and Barnet, C. D.: Using satellite observations to constrain gravity wave parameterizations for global models, J. Atmos. Sci., 64, 1652–1665, 2007.
Alexander, M. J. and Grimsdell, A. W.: Seasonal cycle of orographic gravity wave occurrence above small islands in the Southern Hemisphere: Implications for effects on the general circulation, J. Geophys. Res., 118, 11589–11599, 2013.
Alexander, M. J. and Pfister, L.: Gravity wave momentum flux in the lower stratosphere over convection, Geophys. Res. Lett., 22, 2029–2032, 1995.
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Short summary
We present a 12-year record (2003-2014) of stratospheric gravity wave activity at Southern Hemisphere orographic hotspots as observed by the AIRS/Aqua satellite instrument. We introduce a method to discriminate between gravity waves from orographic or other sources and propose a simple model to predict the occurrence of mountain waves using zonal wind thresholds. The prediction model can help to disentangle upper level wind effects from low level source and other influences.
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