\section*{Credits and Acknowledgements}
\label{section:acknowledgements}

This research is a joint effort of the MIT Center for Meteorology and
Physical Oceanography and the MIT Laboratory for Computer Science.  The
research of Prof.~John Marshall and Chris Hill of the MIT Center for
Meteorology and Physical Oceanography is partially funded by ONR contract
N00014-95-1-0967, and University of California, Scripps Institute of
Oceanography grant PO\#10037358.  The research of Prof.~Arvind, Kyoo-Chan
Cho, R.~Paul Johnson, and Andrew Shaw of the MIT Laboratory for Computer
Science is partially funded by ARPA under ONR contract N00014-92-J-1310.

The ocean model presented here was developed by a team working under 
John Marshall at MIT. Arvind and John Marshall
began the Id implementation.  Kyoo-Chan Cho completed the Id implementation
with help from Chris Hill.  Kyoo-Chan Cho also performed the initial
benchmarking of the Id code on Monsoon with the help of R.~Paul Johnson.
R.~Paul Johnson suggested the hybrid ocean model and has been responsible
for gathering most of the statistics on Monsoon reported here.  Chris Hill
initially suggested the metric of cycles per required floating point
operations to compare the two models.  Andrew Shaw performed the detailed
benchmarking of the Id and Fortran elliptic solvers and developed the
methodology for performance comparisons of the Id and Fortran codes.
Andrew Shaw and Arvind analyzed the performance of the Fortran and Id
codes.

We would like to thank Alan Edelman for his help in the explanation of the
preconditioned conjugate gradient algorithm, and Wim B\"{o}hm and Larry
Rudolph for a careful reading of earlier drafts.
