SURFACE SALINITY RETRIEVAL FROM SMOS, SST AND ARGO FLOATS

A new merged in-situ-satellite SSS L4 product has been developed and validated by CNR. The new product is obtained by applying a multidimensional covariance model for the combination and optimal interpolation of in situ and SMOS salinity data using high resolution information extracted from satellite SST.
The time series of SSS L4 product can be downloaded here.

CALCULATING 3D FIELDS OF TEMPERATURE AND SALINITY FROM SPACE AND IN-SITU DATA

Compared to previous method used at CLS for 3D Ocean State reconstruction, a number of improvements have been implemented in the framework of OSMOSIS: the WOA13 climatology is now used as first guess instead of the ARIVO11 field; new, optimized parameters have been defined and used in the optimal interpolation method; the new OSMOSIS SSS L4 product presented was used together with satellite altimeter SLA to reconstruct synthetic salinity fields at depth.
The new 3D ocean state fields can be downloaded here.

SURFACE CURRENTS RETRIEVAL FROM GOCE AND ALTIMETER DATA

Different recent geoid models based on GOCE data have been tested for calculating mean geostrophic velocities.
The new Mean Dynamic Topography data can be downloaded here.

CALCULATION OF 3D GEOSTROPHIC VELOCITIES

The geostrophic ocean currents have been estimated referencing the dynamic heights to the surface and estimating the surface geostrophic velocities from the absolute dynamic topography maps computed as the sum of the altimeter SLA and the OSMOSIS MDT.
The new 3D ocean currents can be downloaded here.

NET PRIMARY PRODUCTION RETRIEVAL

NPP maps were produced at CLS in near real time using the VGPM model. These maps differ from the Oregon State University maps due to the different input data feeding the VGPM model. In particular, the CLS NPP product exhibits enhanced coverage below 55 South, due to the enhanced coverage of the merged MODIS and MERIS Polymer chlorophyll maps.The CLS NPP maps can be downloaded here.

MICRONEKTON MODEL OPTIMIZATION RESULTS

The experimental datasets (net primary production, euphotic layer depth, temperature, ocean currents) produced during OSMOSIS have been used as inputs to the micronekton model (SEAPODYM-MTL) to estimate a time series of the different functional micronekton groups biomasses distribution. Micronekton model outputs are evaluated using 38 kHz acoustic (NASC) data (14 and 10 transects in Indian and Pacific Oceans respectively) that provide observed abundance indices of micronekton between surface and ~1000 m depth.
Modelled Micronekton distribution data can be downloaded here.