This work is supported by the Australian Greenhouse Office of the Department of Environment and Heritage, Australia, and the Cooperative Research Centre program of the Australian government. The research is a contribution to the CSIRO Wealth from Oceans National Research Flagship.
We are pleased to contribute this work as an addition to a series of papers (that appeared in the February 2007 Journal of Physical Oceanography) honoring the contribution Carl Wunsch continues to make to science. The hydrographic data and altimetry data used in this study were both collected by programs that Carl was instrumental in getting off the ground (TOPEX/Poseidon) or out to sea (the World Ocean Circulation Experiment). Carl has made an immense contribution to improving our understanding and observations of the low-frequency variability of the ocean, through his advocacy for new approaches to observing the ocean and the development of new tools for the rigorous analysis and interpretation of those observations. Carl’s approach to science continues to inspire many of us who have worked with him.
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