Planetary-Scale Mountain Waves
		• Planetary-scale waves are observed that remain fixed with respect to the earth’s surface: • Possible causes are geographic distribution of: – Mountains (Charney and Eliassen 1949) – Land/sea differences and inequitable distribution of sensible and latent heating (Smagorinsky 1953) • After 30 years of debate, answer settled that both are important, but mountains perhaps a little more so