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Type: Journal article
Title: Momentum flux estimates accompanying multiscale gravity waves over Mount Cook, New Zealand, on 13 July 2014 during the DEEPWAVE campaign
Author: Bossert, K.
Fritts, D.
Pautet, P.
Williams, B.
Taylor, M.
Kaifler, B.
Dörnbrack, A.
Reid, I.
Murphy, D.
Spargo, A.
MacKinnon, A.
Citation: Journal of Geophysical Research: Atmospheres, 2015; 120(18):9323-9337
Publisher: Wiley
Issue Date: 2015
ISSN: 2169-897X
Statement of
Katrina Bossert, David C. Fritts, Pierre-Dominique Pautet, Bifford P. Williams, Michael J. Taylor, Bernd Kaifler, Andreas Dörnbrack, Iain M. Reid, Damian J. Murphy, Andrew J. Spargo and Andrew D. MacKinnon
Abstract: Observations performed with a Rayleigh lidar and an Advanced Mesosphere Temperature Mapper aboard the National Science Foundation/National Center for Atmospheric Research Gulfstream V research aircraft on 13 July 2014 during the Deep Propagating Gravity Wave Experiment (DEEPWAVE) measurement program revealed a large-amplitude, multiscale gravity wave (GW) environment extending from ~20 to 90 km on flight tracks over Mount Cook, New Zealand. Data from four successive flight tracks are employed here to assess the characteristics and variability of the larger- and smaller-scale GWs, including their spatial scales, amplitudes, phase speeds, and momentum fluxes. On each flight, a large-scale mountain wave (MW) having a horizontal wavelength ~200–300 km was observed. Smaller-scale GWs over the island appeared to correlate within the warmer phase of this large-scale MW. This analysis reveals that momentum fluxes accompanying small-scale MWs and propagating GWs significantly exceed those of the large-scale MW and the mean values typical for these altitudes, with maxima for the various small-scale events in the range ~20–105 m₂ s−₂.
Rights: © 2015. American Geophysical Union. All Rights Reserved.
DOI: 10.1002/2015JD023197
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