The layer of the atmosphere immediately above the troposphere. Temperatures initially are isothermal, then increase with altitude. STP Standard temperature and pressure. The process by which a substance changes phase from the solid directly to the gaseous without first going through the liquid phase. TOVS determines ozone concentrations by measuring radiance.
Temperatures stop decreasing with altitude.
Almost all weather occurs in this layer. Its average depth is 11 km. UARS Upper Atmosphere Research Satellite. The usual range given is 200 to 380 nm. UNEP United Nations Environment Programme, headquartered in Nairobi, Kenya.