ISSN 打印: 2152-274X
Archives: Volume 1, 2010 to Volume 3, 2012
ENERGY OF ATMOSPHERIC GRAVITY WAVES AS DETERMINED FROM IN SITU SATELLITE MEASUREMENTS
Alla K. Fedorenko
Institute of Space Research of National Academy of Sciences of Ukraine and State Space Agency of Ukraine, Kiev
A technique is suggested for determining spatial energy density distribution of Atmospheric Gravity Waves (AGW) from direct satellite measurements. The technique is capable of estimating the potential energy of the waves using either of the two kinds of satellite data, which are 1) mass-spectrometer measurements of concentrations of the atmospheric gas species and 2) synchronous measurements of the total density and temperature. The distribution of the potential energy components, acoustic and thermobaric ones, as obtained for AGWs observed from the Dynamics Explorer 2 satellite is analyzed. Several kinds of AGWs, with respect to the energy proportions, are identified at altitudes of the F2 ionospheric region. These are polar waves with nearly equal amounts of the two potential energy components, middle latitude and low latitude ones which are characterized by the prevailing amount of the thermobaric energy and nearly equal levels of the potential energy. The maximum energy density of AGWs is observed in polar regions.
键词: atmospheric gravity waves, satellite measurements, potential energy, atmospheric gas components, thermobaric energy, acoustic energy
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