TroposphereDefinition (http://en.wikipedia.org/wiki/Troposphere) The troposphere is the lowest portion of Earth's atmosphere. It contains approximately 80% of the atmosphere's mass and 99% of its water vapor and aerosols. (Wikipedia) Preferred Units: N/A Scope Note: N/A This term is used for the following terms: N/A Approved Date 21-Dec-2012 Click here to give feedback on this term or suggest an update. |