ECCO Version 4: Fourth Release (1992-2017)  [ECCO v4r4]

These are the variables in the ECCO v4r4 output that can be downloaded as daily averages from the PO.DAAC cloud, interpolated to a 0.5-degree latitude-longitude grid:

ShortName         Variable Name     Description (units)

ECCO_L4_SSH_05DEG_DAILY_V4R4
                  SSH               Dynamic sea surface height anomaly. Suitable for comparisons with altimetry sea surface height data products that apply the inverse barometer correction. (m)
                  SSHIBC            The inverted barometer correction to sea surface height due to atmospheric pressure loading. (m)
                  SSHNOIBC          Sea surface height anomaly without the inverted barometer correction. Suitable for comparisons with altimetry sea surface height data products that do NOT apply the inverse barometer correction. (m)

ECCO_L4_ATM_STATE_05DEG_DAILY_V4R4
                  EXFatemp          Atmosphere surface (2 m) air temperature (degK)
                  EXFaqh            Atmosphere surface (2 m) specific humidity (kg/kg)
                  EXFewind          Zonal (east-west) component of ocean surface wind (m/s)
                  EXFnwind          Meridional (north-south) component of ocean surface wind (m/s)
                  EXFwspee          10-m wind speed magnitude (>= 0) over open water (m/s)
                  EXFpress          Atmosphere surface pressure (N/m^2)

ECCO_L4_STRESS_05DEG_DAILY_V4R4
                  EXFtaue           Zonal (east-west) component of wind stress (N/m^2)
                  EXFtaun           Meridional (north-south) component of wind stress (N/m^2)
                  oceTAUE           Zonal (east-west) component of ocean surface stress due to wind and sea-ice (N/m^2)
                  oceTAUN           Meridional (north-south) component of ocean surface stress due to wind and sea-ice (N/m^2)

ECCO_L4_HEAT_FLUX_05DEG_DAILY_V4R4
                  EXFhl             Open ocean air-sea latent heat flux (W/m^2)
                  EXFhs             Open ocean air-sea sensible heat flux (W/m^2)
                  EXFlwdn           Downward longwave radiative flux (W/m^2)
                  EXFswdn           Downwelling shortwave radiative flux (W/m^2)
                  EXFqnet           Open ocean net air-sea heat flux (W/m^2)
                  oceQnet           Net heat flux into the ocean surface (W/m^2)
                  SIatmQnt          Net upward heat flux to the atmosphere (W/m^2)
                  TFLUX             Rate of change of ocean heat content per m^2 accounting for mass (e.g. freshwater) fluxes (W/m^2)
                  EXFswnet          Open ocean net shortwave radiative flux (W/m^2)
                  EXFlwnet          Net open ocean longwave radiative flux (W/m^2)
                  oceQsw            Net shortwave radiative flux across the ocean surface (W/m^2)
                  SIaaflux          Conservative ocean and sea-ice advective heat flux adjustment, associated with temperature difference between sea surface temperature and sea-ice, excluding latent heat of fusion (W/m^2)

ECCO_L4_FRESH_FLUX_05DEG_DAILY_V4R4
                  EXFpreci          Precipitation rate (m/s)
                  EXFevap           Open ocean evaporation rate (m/s)
                  EXFroff           River runoff (m/s)
                  SIsnPrcp          Snow precipitation on sea-ice (kg/(m^2 s))
                  EXFempmr          Open ocean net surface freshwater flux from precipitation, evaporation, and runoff (m/s)
                  oceFWflx          Net freshwater flux into the ocean (kg/(m^2 s))
                  SIatmFW           Net freshwater flux into the open ocean, sea-ice, and snow (kg/(m^2 s))
                  SFLUX             Rate of change of total ocean salinity per m^2 accounting for mass fluxes (g/(m^2 s))
                  SIacSubl          Freshwater flux to the atmosphere due to sublimation-deposition of snow or ice (kg/(m^2 s))
                  SIrsSubl          Residual sublimation freshwater flux (kg/(m^2 s))
                  SIfwThru          Precipitation through sea-ice (kg/(m^2 s))

ECCO_L4_SEA_ICE_CONC_THICKNESS_05DEG_DAILY_V4R4
                  SIarea            Sea-ice concentration (fraction between 0 and 1)
                  SIheff            Area-averaged sea-ice thickness (m)
                  SIhsnow           Area-averaged snow thickness (m)
                  sIceLoad          Average sea-ice and snow mass per unit area (kg/m^2)

ECCO_L4_SEA_ICE_VELOCITY_05DEG_DAILY_V4R4
                  SIeice            Zonal (east-west) component of sea-ice velocity (m/s)
                  SInice            Meridional (north-south) component of sea-ice velocity (m/s)

ECCO_L4_MIXED_LAYER_DEPTH_05DEG_DAILY_V4R4
                  MXLDEPTH          Mixed-layer depth diagnosed using the temperature difference criterion of Kara et al., 2000 (m)

ECCO_L4_OBP_05DEG_DAILY_V4R4
                  OBP               Ocean bottom pressure, excluding global mean atmospheric pressure, given as equivalent water thickness. This is suitable for comparisons with GRACE data products. (m)
                  OBPGMAP           Ocean bottom pressure, includes global mean atmospheric pressure, given as equivalent water thickness. This is suitable for comparisons with ocean bottom pressure gauge data products. (m)

ECCO_L4_OCEAN_VEL_05DEG_DAILY_V4R4
                  EVEL              Zonal (east-west) component of ocean velocity (m/s)
                  NVEL              Meridional (north-south) component of ocean velocity (m/s)
                  WVEL              Vertical velocity (m/s)

ECCO_L4_TEMP_SALINITY_05DEG_DAILY_V4R4
                  THETA             Potential temperature, i.e., temperature of water parcel at sea level pressure (degC)
                  SALT              Salinity (1e-3, or parts per thousand)

ECCO_L4_DENS_STRAT_PRESS_05DEG_DAILY_V4R4
                  RHOAnoma          In-situ seawater density anomaly (kg/m^3)
                  DRHODR            Density stratification ((kg/m^3)/m)
                  PHIHYD            Ocean hydrostatic pressure anomaly (m^2/s^2)
             
ECCO_L4_BOLUS_05DEG_DAILY_V4R4
                  EVELSTAR          Zonal (east-west) component of the Gent-McWilliams bolus ocean velocity (m/s)
                  NVELSTAR          Meridional (north-south) component of the Gent-McWilliams bolus ocean velocity (m/s)
                  WVELSTAR          Vertical component of the Gent-McWilliams bolus ocean velocity (m/s)