This work is supported by the Australian Government’s Cooperative Research Centres Programme through the Antarctic Climate and Ecosystems CRC, the CSIRO Wealth from Oceans National Flagship, and the Australian Climate Change Science Program. We greatly appreciate the discussions on the theory of neutral surfaces with Trevor McDougall and David Jackett, and we would like to express our thanks to Glenn Hyland and Martin Dix for their assistance with access to data. We acknowledge the modeling groups for providing their data for analysis, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) for collecting and archiving the model output, and the JSC/CLIVAR Working Group on Coupled Modelling (WGCM) for organizing the model data analysis activity. The multimodel data archive is supported by the Office of Science, U.S. Department of Energy.
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