Understanding the processes involved in the transformation of carbon, phosphorus, nitrogen, and other major elements in the oceans has been a major interest of oceanographers over the past decade. Marine dissolved organic matter (DOM) plays a vital role in regulating global patterns and cycling of the major elements of seawater. There are a number of biochemical, photochemical and physical transformations that marine DOM can be influenced by, including DOM production, diagenesis and re-mineralization, as well as interactions with trace metals and microbes. Additionally, marine DOM plays important roles at environmental interfaces such as those between land and sea, sediment and water, particle and bulk solution. This course will cover both well-established and recently developed concepts on marine DOM relevant to future marine scientists, in particular those in the fields of chemistry, biogeochemistry and ecology.