Eddy diffusivity from Argo temperature and salinity profiles
Cole, Sylvia T.
Wortham, Cimarron J. L.
Owens, W. Brechner
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Argo temperature and salinity profiles are combined with ECCO-2 velocity profiles to estimate eddy diffusivity in the upper 2000 m of the global ocean. The dataset includes relevant intermediate parameters (mixing length, salinity standard deviation, salinity gradient, velocity standard deviation) in addition to eddy diffusivity. The dataset is available using 1° or 3° bins.
This dataset was processed as documented in Cole et al., 2015 (Eddy stirring and horizontal diffusivity from Argo float observations: Geographic and depth variability, Geophysical Research Letters, 42, 3989-3997, doi:10.1002/2015GL063827) and updated to include 1° and 3° versions as well as Argo data from 2005-2015. Diffusivity is estimated between 62°S and 62°N whenever the minimum number of profiles is met and the estimated mixing length does not exceed the designated threshold. These conditions vary by depth / density surface. The estimated eddy diffusivity exhibits variability with geographic location and with depth.