Product: Oceanic Excitation Functions
EAMF (OAM) - ECCO_kf066b_6hr - Version metadata

EAMF (OAM) - ECCO_kf066b_6hr

ECCO_kf066b_6hr

2019-11-26

Global oceanic excitation functions (mass and motion terms)
Ocean model : ECCO (based on MITgcm)
Horizontal domain : 80 degrees South to 80 degrees North latitude
Horizontal resolution : 1/3 degree at equator to 1 degree at high latitudes by 1 degree longitude
Vertical resolution : 46 levels ranging in thickness from 10 m at surface to 400 m at depth
Boussinesq model? : Yes
Tabulated mass term corrected for volume changes due to steric effects? : Yes

Ocean model forcing :
Surface wind stress : 12-hour NCEP/NCAR reanalysis
Surface heat flux : Daily NCEP/NCAR reanalysis
Surface freshwater flux : Daily NCEP/NCAR reanalysis (freshening only)
Surface pressure : None

Data assimilated : Altimetric measurements of sea surface height and XBT data

File units : milliarcseconds (mas) for chi-x and chi-y, milliseconds (ms) for lod 1. The tabulated date corresponds to the midpoint of the 6-hour-long averaging interval.

2. The mean has been removed from the tabulated excitation values.
The mean chi mass term (mas,mas,ms; chi-x,chi-y,lod) = 1.64265505E+06 1.24061176E+06 3.69504034E+04
The mean chi motion term (mas,mas,ms; chi-x,chi-y,lod) = -1.84812455E+01 1.09358192E+01 1.60941286E-01

3. The oceanic excitation functions have been computed from the oceanic angular momenta
by Equations (4) and (6) of Gross et al. (2005).

6-hour averages

1993-01-01

2008-03-30

22271

MJD, mass_chiX, mass_chiY, mass_LOD, motion_chiX, motion_chiY, motion_LOD

ASCII

Irregular

Geophysical fluids, excitation functions

Gross, An Improved Empirical Model for the Effect of Long-Period Ocean
Tides on Polar Motion, J. Geodesy, submitted, 2008

GGFC Special Bureau for the Oceans

Richard.Gross@jpl.nasa.gov

onLine

ftp://ig2-dmz.gfz-potsdam.de/GGFC-Oceans/CHI/ECCO_kf066b_6hr.chi