Atmosphere of Earth that gas. The stratosphere defines a layer in which temperatures rise with increasing altitude. This rise in temperature is caused by the absorption of ultraviolet radiation (UV) radiation from the Sun by the ozone layer, which restricts turbulence and mixing. Although the temperature may be at the tropopause, the top of the stratosphere is much warmer, and may be near 0 °C. The stratospheric temperature profile creates very stable atmospheric conditions, so the stratosphere lacks the weather-producing air turbulence that is so prevalent in the troposphere. Consequently, the stratosphere is almost completely free of clouds and other forms of weather.
Atmospheric Radiation Measurement Climate Research Facility located on Graciosa Island in the Azores. The Azores are an island group located in the northeastern Atlantic Ocean, a region characterized by marine stratocumulus clouds. Response of these low clouds to changes in atmospheric greenhouse gases and aerosols is a major source of uncertainty in global climate models. Atmospheric Radiation Measurement Climate Research Facility The Atmospheric Radiation Measurement Climate Research Facility (ARM Climate Research Facility) is a United States Department of Energy scientific user facility for the study of global climate change by the national and international research community. The ARM Climate Research Facility consists of global observation sites