Abstract:
The central theme of the 1999 GFD Program was the stirring, transport, reaction and mixing of passive and active tracers in
turbulent, stratified, rotating fluids. The problem of mixing in fluids has applications in areas ranging from oceanography to
engineering and astrophysics. In geophysical settings, mixing spans and unites a broad range of scales -- from micrometers to
megameters. The mixing of passive tracers is of fundamental importance in environmental and industrial problems, such as
pollution, and in determining the large-scale heat and salt balance of the worlds oceans. The transport of active tracers, on the other
hand, such as vorticity, plays a key role in the turbulence that occurs in most geophysical and astrophysical fluids. William R.
Young (Scripps Institution of Oceanography) gave a series of principal lectures, the notes of which as taken by the fellows, appear
in this volume. Report of the projects of the student fellows makes up the second half of this volume.
