Momentum flux estimates accompanying multiscale gravity waves over Mount Cook, New Zealand, on 13 july 2014 during the DEEPWAVE campaign

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, Andrew D. MacKinnon

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Observations performed with a Rayleigh lidar and an Advanced Mesosphere TemperatureMapper 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 90km 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 ~20-105m-2. s-2.

Original languageEnglish (US)
Pages (from-to)9323-9337
Number of pages15
JournalJournal of geophysical research
Volume120
Issue number18
DOIs
StatePublished - 2015
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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