The ERA and NCEP reanalysis data were provided by the NOAA/CIRES Climate Diagnostics Center, Boulder, Colorado (http://www.cdc.noaa.gov/). The satellite data were provided by the NASA/Langley Atmospheric Sciences Data Center (http://agni.larc.nasa.gov/SRB_homepage.html). Steve Worley at NCAR provided the mixed layer depth data. We thank Clara Deser and two anonymous reviewers for their comments which resulted in many improvements to the manuscript. This research was supported under NOAA Grant GC98-139.
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