Production and condensation of organic gases in the atmosphere of Titan

摘要: The rates and altitudes for the dissociation of atmospheric constituents Titan are calculated solar UV, wind protons, interplanetary electrons, Saturn magnetospheric particles, cosmic rays. resulting integrated synthesis organic products range from 102–103 g cm−2 over 4.5 × 109 years high-energy particle sources to 1.3 104 UV at λ 1550 A (acting primarily on C2H2, C2H4, C4H2) is included. production rate curves show no localized maxima corresponding observed Titan's hazes clouds. For simple moderately complex gases in Titanian atmosphere, condensation occurs below top main cloud deck 2825 km. Such condensates comprise principal mass, with molecules greater complexity condensing higher altitudes. scattering optical depths produced mesosphere as great ∼ 102/(particulate radius, μm) if column densities condensed gas phases comparable. Visible more compounds may occur up 3060 km provided only that abundance declines molecular mass faster than laboratory experiments indicate. Typical organics 2900 have masses = 100–150 Da. At current depth precipitated liquids, ices, tholins ranges a minimum 100 m kilometers > important. nitrogen content this layer expected be 10−1−10−3 by mass.