Correlations between cloud thickness and sub‐cloud water abundance on Venus
作者： Constantine C. C. Tsang , Colin F. Wilson , Joanna K. Barstow , Patrick G. J. Irwin , Fredric W. Taylor
DOI: 10.1029/2009GL041770
关键词: Spatial variability 、 Meteorology 、 Environmental science 、 Abundance (ecology) 、 Altitude 、 Water vapor 、 Imaging spectrometer 、 Atmospheric sciences 、 Cloud height 、 Venus 、 Depth sounding
摘要: [1] Past spacecraft observations of Venus have found considerable spatial and temporal variations water vapour abundance above the clouds. Previous searches for variability below clouds at 30-45 km altitude no large scale latitudinal gradients, but lacked resolution to detect smaller variations. Here we interpret results from VIRTIS imaging spectrometer on Express, remotely sounding near-infrared 'spectral window' wavelengths, as indicating that 30-40 varies 22 35 ppmv (±4 ppmv). Furthermore, this is correlated with cloud opacity, supporting hypothesis its genesis linked convection. It also possible fit without requiring variation abundance, places a strong constraint spectral dependence refractive index data assumed lower particles, which there yet evidence.
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