AbstractLower-mesospheric inversion layers (MILs) were studied using the temperature profiles observed by TIMED/SABER over Cariri (7.5°S, 36.5°W), Brazil, in 2005. A total 175 MILs were identified with the maximum occurrence in April and October and the minimum in January and July. The lower MIL is located in a height region from 70 to 90km, with the peak at around 83±4km with the temperature of 205±5K, and the thickness of 4–10km. The results show large amplitudes of MILs during equinoxes and minimum in solstices, with a clear semiannual variation. A general feature of lower MIL in monthly mean profile was observed twice a year, one from February to May, and the other from August to October with a downward shift of the top level. These results suggest that formation and long persistence of MIL is an important factor to investigate propagation of atmospheric gravity waves in the mesosphere-lower thermosphere (MLT) region.


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    Title :

    Lower-mesospheric inversion layers over brazilian equatorial region using TIMED/SABER temperature profiles


    Contributors:
    Fechine, J. (author) / Wrasse, C.M. (author) / Takahashi, H. (author) / Mlynczak, M.G. (author) / Russell, J.M. (author)

    Published in:

    Advances in Space Research ; 41 , 9 ; 1447-1453


    Publication date :

    2007-04-24


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English