Tropical Pacific Ocean State Estimation (TPOSE)

TPOSE is a synthesis of observations of the tropical Pacific. It is produced by constraining a regional setup of the MIT general circulation model (MITgcm) to fit data from Argo floats, moorings, and satellites through the adjoint method (4D-Var), resulting in a physically-realistic estimate of the ocean state. For more information see Verdy, Cornuelle, Mazloff, and Rudnick, 2017: Estimation of the Tropical Pacific Ocean State 2010-2013. J. Atmos. Oceanic Technol., 34, 1501-1517

Results

TPOSE-bgc

The state estimate is coupled to a biogeochemical model (N-BLING). BGC data is not assimilated, but is used for validation. Available output includes dissolved inorganic carbon, alkalinity, oxygen, nitrate, phosphate, iron, and chlorophyll. Additional variables may be available on request.

TPOSE.6-bgc: monthly averages (2014-2016)

We also have a free forward run of the BGC model, driven by ERA5 atmospheric state.

fwd run: monthly averages (2004-2019)

TPOSE.6

A new higher-resolution state estimate is being produced. It has 1/6 degree horizontal resolution and 66 vertical levels, with 2 m thickness in the upper layers.

Validation: model-observations comparison

TPOSE.3

We have produced a state estimate at 1/3 degree resolution for the period 2010-2019. The output is publicly available (please cite appropriately). Some fields can be obtained by clicking on the links below; for additional diagnostics, please do not hesitate to contact us directly.

SST: animation 2010-2017, 28.5 degree contour animation 2016-2017, 28.5 degree contour animation 2010-2017 [note: animations show satellite observations on top and state estimate at the bottom]

SSH: animation 2015-2017, animation 2010-2017 [note: animations show AVISO product on top and state estimate at the bottom]

Validation: model-observations comparison
Download files in netcdf format:
SSH, daily: 2010 to 2019
SST, daily: 2010 to 2019
Potential temperature, monthly: 2010 to 2019
Potential temperature, 5-day averages: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Potential temperature, daily: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Salinity, monthly: 2010 to 2019
Salinity, 5-day averages: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Salinity, daily: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Zonal velocity, monthly: 2010 to 2019
Zonal velocity, 5-day averages: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Zonal velocity, daily: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Meridional velocity, monthly: 2010 to 2019
Meridional velocity, 5-day averages: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Meridional velocity,daily: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Vertical velocity (missing 2010-2014), monthly: 2015 to 2019
Vertical velocity (missing 2010-2014), 5-day averages: 2015, 2016, 2017, 2018, 2019
Vertical velocity (missing 2010-2014), daily: 2015, 2016, 2017, 2018, 2019

Citation

When using this state estimate please cite: Verdy, Cornuelle, Mazloff, and Rudnick, 2017: Estimation of the Tropical Pacific Ocean State 2010-2013. J. Atmos. Oceanic Technol., 34, 1501-1517

Contact

Ariane Verdy, Bruce Cornuelle