The PNNL team collaborated with scientists from University of Maryland to develop a comprehensive
global hydrography database at 7 different spatial resolutions, ranging from 1/16 to 2 degree resolutions.
Steele, M., R. Morley, and W. Ermold,» PHC: A
global ocean
hydrography with a high quality Arctic Ocean», J. Climate, 14, 2079 - 2087, 2001.