Relationship of biogeochemical cycles in the atmosphere, lithosphere, and biosphere to global chemical cycles and planetary climatic conditions. GES degree foundation and capstone course with an emphasis on improving student writing skills. GES majors only. Senior standing only. A-F only. Pre: OCN 201, GES 311, 319L, BIOL 172/172L, CHEM 162/162L, ERTH 101/101L, GES 319L (or concurrent), ATMO 200 (or concurrent), and GES/OCN 499 (or concurrent); or consent. (Fall only) (Cross-listed as OCN 401)