Open AccessA study of the relationship between stratospheric gravity waves and polar mesospheric clouds at Davis Antarctica
Author(s) -
Innis J. L.,
Klekociuk A. R.,
Morris R. J.,
Cunningham A. P.,
Graham A. D.,
Murphy D. J.
Publication year - 2008
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2007jd009031
Subject(s) - gravity wave , atmospheric sciences , gravitational wave , stratosphere , altitude (triangle) , polar , polar vortex , climatology , geology , environmental science , physics , astronomy , geometry , mathematics
We used a Rayleigh lidar located at Davis station, East Antarctica, to compare Polar Mesospheric Cloud (PMC) and stratospheric gravity wave (GW) strengths in the austral summer 2005–2006. Earlier similar studies from Greenland noted that intervals of large stratospheric GW activity appeared to coincide with reduced PMC strengths. We measure the stratospheric GW strength in the 30–45 km altitude range, for waves of vertical wavelength between ∼2 and ∼10 km, and of periods greater than 1 h. We find little consistency with the Greenland studies, as the occurrence of PMC over Davis appear to have little relationship to observed stratospheric gravity wave activity. Hemispheric differences, in both PMC strength and occurrence and in gravity wave strength, may have a role in explaining our results. Our data suggest that a significant controller of occurrence of PMC over Davis is related to diurnal tidal movement. We also investigate the potential influence of sampling biases in our data set.