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,
What We Live For "we tried to take a lot of the stuff that our fans like and love about us from Oh, What a Life and take that to the next level as far as sounds go. [We] brought back some of the old instruments like mandolin and banjo, but also experimented with a lot of different sounds like vocal samples. We brought back a lot of piano [and] bigger harmonies." Lyrically, the album builds on "Oh, What a Life"s biographical themes, which followed the band's origins and journey; "What We Live For" documents the band's experiences during the present and their perspective