ECCO version 4

ECCO version 4: an integrated framework for non-linear inverse modeling and global ocean state estimation G. Forget, J.-M. Campin, P. Heimbach, C. N. Hill, R. M Ponte, and C. Wunsch Dept. of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge MA 02139, USA Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, TX 78712, USA Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78712, USA Atmospheric and Environmental Research, Inc., Lexington MA 02421, USA Dept. of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02139, USA