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Thermal tropopause represents the region of the atmosphere where the environmental lapse rate changes from tropospheric positive to stratospheric negative. It also defines the altitude of the atmosphere beneath which significant weather perturbations occur except occasional overshooting thunderstorms in the tropical regions. Accordingly, how the temporal and spatial variability of thermal tropopause...
Measurements of 47 hydrocarbons and 3 carbonyls were performed at six sites in July 2006 and in October–November 2008 in Pearl River Delta (PRD), China. The distribution of volatile organic compound (VOC) concentrations and compositions at different sites revealed photochemical losses of hydrocarbons and secondary formation of carbonyls. Carbonyls were shown to be an important contributor to OH loss...
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