[PPS06-07] Wavelet analysis of gravity wave packets in Venus’ atmosphere using radio occultation temperature profiles
Keywords:atmospheric gravity wave, Venus, wavelet analysis, radio occultation
We study the characteristics of gravity wave packets in Venus’s atmosphere using high vertical resolution temperature profiles obtained by Venus Express and Akatsuki radio occultation experiments with radio holographic methods. Localized disturbances are extracted by applying wavelet transform to the vertical temperature distributions. The analysis showed that (1) wave packets having different wavelengths are overlapped with each other, (2) each wave packet typically includes 2-3 cycles, (3) waves with vertical wavelengths of ~1 km are dominant,(4) individual wave packets are hardly saturating in isolation, while saturation occurs as a result of superposition of wave packets, and (4) short-vertical wavelength waves are more frequently observed at lower altitudes.