An expedition to the Weddell Sea aboard the R.V. Nathaniel B. Palmer will take place in the late Antartic Winter of 2005 (see Figures 1 and 2). The goals of the expedition are to survey the area around Maud Rise looking for conditions favorable for overturning convection and to conduct a detailed process study of the role of nonlinearities in the equation of state in promoting convection (Figure 3).

Figure 1. The icebreaker Nathaniel B. Palmer.

Figure 2. The path that the R.V. Palmer will take on the late-winter expedition.

Figure 3. Schematic Diagram of physical porcesses of interest and measurement systems used to observe them.