%0 Journal Article
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%X A sodium lidar, capable of measuring temperature in the 80-100 km region, has been in operation at Sao Jose dos Campos (23 degrees S, 46 W) since March 2007. Good quality data have been obtained for late autumn, winter and spring, but weather conditions make it extremely difficult to make measurements from mid-November to mid- February. We find the temperature structure to be strongly modulated by tides and gravity waves, but average profiles typically show a primary mesopause height close to 100 km with temperatures around 180 K, and a tendency for a secondary minimum of about 185 K to occur close to 90 km. Vertical temperature gradients greater than 50 K/km are sometimes seen even on profiles averaged over several hours. The strongest gradients are always positive and are frequently associated with strong gradients in sodium concentration. On the other hand, we frequently see rapid changes in the temperature profile, suggesting that models and non-local temperature measurements, as made by satellite radiometers, for example, are of little use in applications such as the analysis of gravity wave propagation seen in airglow images. 38th COSPAR Scientific Assembly. Held 18-15 July 2010, in Bremen, Germany, p.4.
%@mirrorrepository sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
%8 Apr.
%N 7
%T Sodium lidar measurements of mesopause region temperatures at 23° S
%K MLT, Upper atmosphere, Temperature, Lidar, Sodium, HYPERFINE-STRUCTURE, MIDDLE ATMOSPHERE, THERMAL STRUCTURE, GRAVITY-WAVES, LASER RADAR, ART., LATITUDE, BRAZIL, LAYER.
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%@usergroup marciana
%@usergroup tereza@sid.inpe.br
%@group DAE-CEA-INPE-MCT-BR
%@group DAE-CEA-INPE-MCT-BR
%@group DAE-CEA-INPE-MCT-BR
%@e-mailaddress tereza@sid.inpe.br
%3 sdarticle-5.pdf
%@secondarykey INPE--PRE/
%@issn 0273-1177
%2 sid.inpe.br/mtc-m19/2011/02.15.17.07.47
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%B Advances in Space Research
%@versiontype publisher
%P 1165-1171
%4 sid.inpe.br/mtc-m19/2011/02.15.17.07
%@documentstage not transferred
%D 2011
%V 47
%@doi 10.1016/j.asr.2010.11.030
%A Clemesha, Barclay Robert,
%A Simonich, Dale Martin,
%A Batista, P. P,
%@dissemination WEBSCI; PORTALCAPES; MGA; COMPENDEX.
%@area CEA