%0 Journal Article
%4 sid.inpe.br/mtc-m19@80/2010/
%2 sid.inpe.br/mtc-m19@80/2010/
%@issn 1364-6826
%T Mesopause region temperature structure observed by sodium resonance lidar
%D 2010
%8 Junho
%A Clemesha, Barclay Robert,
%A Simonich, Dale,
%A Batista, Paulo Prado,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Journal of Atmospheric and Solar-Terrestrial Physics
%V 72
%N 9-10
%P 740 - 744
%K gravity-wave perturbations, density response, wind shears, na layer.
%X Mesopause region temperature measurements made with a sodium resonance lidar show two unexpected features: (1) Strong positive temperature gradients are often associated with strong gradients in the sodium concentration and (2) positive temperature gradients are generally much stronger than negative ones. Although the structures we see frequently appear to be associated with gravity waves or tides, the asymmetrical temperature oscillations cannot be explained as the result of simple wave propagation. We suggest that strong positive temperature gradients correspond to regions of high atmospheric stability, where eddy diffusion is inhibited, permitting the build-up of strong gradients in temperature and minor constituent mixing ratio.
%@language en
%3 clemesha.pdf