[MITgcm-support] Open boundary conditions using ECCO data

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Hi all,



I am running a regional version of MITgcm with exf and obcs packages turned on. I would like to use global ECCO u/v/t/s data (ftp://mit.ecco-group.org/ecco_for_las/version_4/release2/interp_monthly/) as the boundary forcings of my regional model.

However, I have some problems with the forcing data preparation.



(1) There are two kinds of velocity in ECCO v4r2 dataset: Mass-Weighted Comp of Velocity and Bolus Velocity, which one should I use as the velocity boundary forcings?  I prefer the former one, but not very sure about it.

(2) As the velocity is available in form of mass-weighted, should I make some conversion on it and then interpolate to target  grids?  Or directly interpolate mass-weighted velocity to target grids at vertical levels of each boundary?



Does anyone have any suggestion on the questions? Your help would be much appreciated.



Best regards,

Delei Li

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Key Laboratory of Ocean Circulation and Waves,

Institute of Oceanology, Chinese Academy of Sciences,

Nanhai Street No. 7, 266071, Qingdao, P.R. China

Telephone: 0532-82898839

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