Stratospheric Gravity Wave Fluxes and Scales during DEEPWAVE

• Published in: Journal of the Atmospheric Sciences
• Main Authors: Smith, Ronald B., Nugent, Alison D., Kruse, Christopher G., Fritts, David C., Doyle, James D., Eckermann, Steven D., Taylor, Michael J., Dörnbrack, Andreas, Uddstrom, M., Cooper, William, Romashkin, Pavel, Jensen, Jorgen, Beaton, Stuart
• Format: Other Non-Article Part of Journal/Newspaper
• Language: German
• Published: American Meteorological Society 2016
• Subjects: Verkehrsmeteorologie; Southern Ocean; New Zealand
• Online Access: https://elib.dlr.de/107196/; https://elib.dlr.de/107196/1/Alet-D%C3%B6rnbrack-JAS-D-15-0324.1.pdf; https://doi.org/10.1175/JAS-D-15-0324.1

During the Deep Propagating Gravity Wave Experiment (DEEPWAVE) project in June and July 2014, the Gulfstream V research aircraft flew 97 legs over the Southern Alps of New Zealand and 150 legs over the Tasman Sea and Southern Ocean, mostly in the low stratosphere at 12.1-km altitude. Improved instrument calibration, redundant sensors, longer flight legs, energy flux estimation, and scale analysis revealed several new gravity wave properties. Over the sea, flight-level wave fluxes mostly fell below the detection threshold. Over terrain, disturbances had characteristic mountain wave attributes of positive vertical energy flux (EFz), negative zonal momentum flux, and upwind horizontal energy flux. In some cases, the fluxes changed rapidly within an 8-h flight, even though environmental conditions were nearly unchanged.