Artículos de revistas
Evidence Of Internal Gravity Waves In The Lower Ionosphere
Registro en:
Planetary And Space Science. , v. 19, n. 6, p. 561 - 566, 1971.
320633
10.1016/0032-0633(71)90052-3
2-s2.0-49649154401
Autor
Rai D.B.
Fejer B.G.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Temperature and wind measurements extending up to 95 km have been made with rocket-grenade experiments at Natal, Brasil. On many occasions the temperature and wind speed above 60 km show uniformly spaced maxima and minima. In one series of these experiments four rockets were launched during a period of 18 hr. A comparison of these spaced observations gives an indication of the propagating character of the maxima and minima and also suggests a downward phase propagation. The perturbations in the temperature and the wind speed are similar in form but they appear to differ in phase. The wavelike appearance of the temperature profiles is believed to be caused by the adiabatic heating and cooling associated with propagating gravity waves. The wavelength obtained from these observations is 10-12 km which coincides with the expected vertical wavelength of 12 km for the dominant gravity wave in this altitude range. The observed temperature variations are also in agreement with the computed values for the prevailing conditions. © 1971. 19 6 561 566 2005/56578-4; FAPESP; Conselho Nacional de Desenvolvimento Científico e Tecnológico; 2009/00270-2; FAPESP; Conselho Nacional de Desenvolvimento Científico e Tecnológico; 2009/10046-2; FAPESP; Conselho Nacional de Desenvolvimento Científico e Tecnológico; 2011/01106-1; FAPESP; Conselho Nacional de Desenvolvimento Científico e Tecnológico; 500148/2011-2; CNPq; Conselho Nacional de Desenvolvimento Científico e Tecnológico Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Harris, Sharp, Knudsen, Gravity waves observed by ionospheric temperature measurements in the F-region (1969) Journal of Geophysical Research, 74, p. 197 Hines, Internal atmospheric gravity waves at ionospheric heights (1960) Canadian Journal of Physics, 38, p. 1441 Hines, Dynamic heating of the upper atmosphere (1965) Journal of Geophysical Research, 70, p. 177 Knudsen, Sharp, Evidence for temperature stratification in the E-region (1965) Journal of Geophysical Research, 70, p. 143 Lindzen, Data necessary for the detection and description of tides and gravity waves in the upper atmosphere (1969) J. atmos. terr. Phys., 31, p. 449 Midgley, Liemohn, Gravity waves in a realistic atmosphere (1966) Journal of Geophysical Research, 71, p. 3729 Vasseur, Waldteufel, Thomson-Scatter observations of a gravity wave in the ionospheric F-region (1969) J. atmos. terr. Phys., 31, p. 885 Wand, Perkins, Radar Thomson Scatter observations of temperature and ion neutral collision frequency in the E-region (1968) Journal of Geophysical Research, 73, p. 6370