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Assessment of the upper-ocean observing system in the equatorial Pacific: The role of Argo in resolving intraseasonal to interannual variability*

Using more than 10 years of Argo temperature and salinity profiles (2004–14), a new mapping of the upper ocean in the equatorial Pacific, with high temporal resolution, is presented. Following RG09 procedures, which were formulated for describing monthly large-scale anomalies globally, here anomaly fields at 5-day intervals are constructed utilizing improvements in the optimal interpolation that include more accurate representation of zonal and meridional scales and the noise-to-signal ratio, and by including the time domain.

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