Atmosphere of Earth surface. The refractive index of air depends on temperature, giving rise to refraction effects when the temperature gradient is large. An example of such effects is the mirage. "Atmospheric circulation" is the large-scale movement of air through the troposphere, and the means (with ocean circulation) by which heat is distributed around Earth. The large-scale structure of the atmospheric circulation varies from year to year, but the basic structure remains fairly constant because it is determined by Earth's rotation rate and the difference in solar radiation between the equator and poles. The first atmosphere consisted of gases in the solar nebula,
Live Earth (United Kingdom, Middle East) and the Star World Channel. MSN was "the exclusive global broadband partner for Live Earth India." The concert was cancelled shortly after the November 2008 Mumbai attacks on November 26, 2008. Wall, Gore, and Pachauri stated in a joint press release that, "due to circumstances far beyond our control, we are saddened to announce that "Live Earth India" has been cancelled. We will continue to work for solutions to the climate crisis for the good of the people of India and around the world. But for now, our thoughts and our prayers are with the victims