1. Principal Oceanographer, TerraCosta Consulting Group, 3890 Murphy Canyon Rd., Suite 200, San Diego, CA 92123; and Oceanographer, California Dept. of Boating and Waterways, Scripps Institution of Oceanography, 9500 Giman Dr., La Jolla, CA 92093-0209 (corresponding author).
2. Technical Director, U.S. Army Corps of Engineers, Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH 03755.
3. Chief Scientist, National Ocean Service, Center for Operational Oceanographic Products and Services, National Oceanic and Atmospheric Administration, Silver Spring, MD 20910.