------------------------------------------------------------------------------------------------------------- ECCO Version 4: Third Release [ECCO v4-r3] [ftp://ecco.jpl.nasa.gov/Version4/Release3/] ------------------------------------------------------------------------------------------------------------- WARNING: DO NOT USE THESE INTERPOLATED FIELDS FOR BUDGET CALCULATION. USE THE FIELDS ON NATIVE GRID IN THE DIRECTORY nctile_monthly INSTEAD. - This directory contains the 'ECCO version 4, release 3' monthly outputs interpolated onto regular lat-lon grid: README This file ADVr_SLT Vertical Advective Flux of Salinity (psu.m^3/s) ADVr_TH Vertical Advective Flux of Pot.Temperature (degC.m^3/s) DFrE_SLT Vertical Diffusive Flux of Salinity (Explicit part) (psu.m^3/s) DFrE_TH Vertical Diffusive Flux of Pot.Temperature (Explicit part) (degC.m^3/s) DFrI_SLT Vertical Diffusive Flux of Salinity (Implicit part) (psu.m^3/s) DFrI_TH Vertical Diffusive Flux of Pot.Temperature (Implicit part) (degC.m^3/s) DRHODR Stratification: d.Sigma/dr (kg/m3/m) ETAN Free Surface Height Anomaly (Ocean-Ice Interface) (m) EVEL East-West Comp. of Velocity (m/s) EVELMASS East-West Geometry-Weighted Comp of Velocity (m/s) EVELSTAR East-West Comp. of Bolus Velocity (m/s) MXLDEPTH Mixed-Layer Depth (>0) (m) NVEL North-South Comp. of Velocity (m/s) NVELMASS North-South Geometry-Weighted Comp of Velocity (m/s) NVELSTAR North-South Comp. of Bolus Velocity (m/s) OBP Ocean Bottom Pressure adjusted with global steric height change (m) oceFWflx net surface Fresh-Water flux into the ocean (+=down), >0 decreases salinity (kg/m^2/s) oceQnet net surface heat flux into the ocean (+=down), >0 increases theta (W/m^2) oceQsw net Short-Wave radiation (+=down), >0 increases theta (W/m^2) oceSPflx net surface Salt flux rejected into the ocean during freezing, (+=down) (g/m^2/s) oceSPtnd salt tendency due to salt plume flux >0 increases salinity (g/m^2/s) oceTAUE Eastward Comp. surface wind stress, >0 increases EVel (N/m^2) oceTAUN Northward Comp. surface wind stress, >0 increases NVel (N/m^2) PHIBOT Bottom Pressure Pot.(p/rhoConst) Anomaly (m^2/s^2) w.r.t. the product of gravity and ocean bottom depth. RhoConst is a constant density of 1029 kg/m^3 and gravity 9.81 m/s^2. PHIHYD Hydrostatic Pressure Pot.(p/rho) Anomaly (m^2/s^2) RHOAnoma Density Anomaly (=Rho-rhoConst) (kg/m^3) SALT Salinity (psu) SFLUX total salt flux (match salt-content variations), >0 increases salt (g/m^2/s) SIarea SEAICE fractional ice-covered area [0 to 1] (m^2/m^2) SIatmFW Net freshwater flux from atmosphere & land (+=down) (kg/m^2/s) SIatmQnt Net atmospheric heat flux, >0 decreases theta (W/m^2) sIceLoad SEAICE loading (in Mass of ice+snow / area unit) (kg/m^2) SIheff SEAICE effective ice thickness (m) SIhsnow SEAICE effective snow thickness (m) SIsnPrcp Snow precip. (+=dw) over Sea-Ice (area weighted) (kg/m^2/s) SSH Surface Height Anomaly adjusted with global steric height change and sea-ice load (m) TFLUX total heat flux (match heat-content variations), >0 increases theta (W/m^2) THETA Potential Temperature (degC) WVELMASS Vertical Comp of Velocity (m/s) WVELSTAR Vertical Comp of Bolus Velocity (m/s) - WARNING: DO NOT USE THESE INTERPOLATED FIELDS FOR BUDGET CALCULATION. USE THE FIELDS ON NATIVE GRID IN THE DIRECTORY nctile_monthly INSTEAD. - Each directory "VAR" contains yearly files, VAR.YYYY.nc, for a particular variable "VAR". YYYY is from 1992 to 2015. - Each file contains the monthly model field interpolated onto regular lat-lon grid with 0.5 degree resolution in both directions. - References: Fukumori, I., O. Wang, I. Fenty, G. Forget, P. Heimbach, and R. M. Ponte, 2017: ECCO Version 4 Release 3, http://hdl.handle.net/1721.1/110380, doi:1721.1/110380. Available at ftp://ecco.jpl.nasa.gov/Version4/Release3/doc/v4r3_estimation_synopsis.pdf Forget, G., J.-M. Campin, P. Heimbach, C. N. Hill, R. M. Ponte, and C. Wunsch, 2015: ECCO version 4: an integrated framework for non-linear inverse modeling and global ocean state estimation. Geoscientific Model Development, 8, 3071-3104, doi:10.5194/gmd-8-3071-2015 - Software: The ECCO v4-r3 files were produced using the ’checkpoint65p’ versions of the general circulation model (MITgcm and ECCO v4 settings) and Matlab analysis toolboxes (gcmfaces and MITprof). These software versions are available at http://mitgcm.org/download/other_checkpoints/ and http://mit.ecco-group.org/opendap/ecco_for_las/version_4/checkpoints/contents.html - Contact Us: ecco-support@mit.edu (please subscribe via http://mailman.mit.edu/mailman/listinfo/ecco-support) ----------------------------- README file revision history: ----------------------------- - Split to yearly files to reduce indv. file size [Ou Wang] [2018/03/03] - Add SSH and OBP [Ou Wang] [2017/12/12] - Add bolus velocities [Ou Wang] [2017/12/11] - Add velocity fields [Ou Wang] [2017/11/28] - README file creation [Ou Wang] [2016/08/02]