How to download HYCOM
From Dr. Dan Yu (July 2018):
This HYCOM download tool uses “ferret” as interface. Please visit ferret web site to see details of the software.
You can download our tool here.
Once you download and untar, there’re 2 directories (9x.x_exp & 19.x_exp) that correspond to 2 different HYCOM experiment datasets; check HYCOM web site for further details about the description of the datasets.
Main script is listdate.sh in each dir, edit options as you needed. For example:
- exp="91.1" HYCOM experiment
- lon_s="120E" start longitude
- lon_e="125E" end longitude
- lat_s="20N" start latitude
- lat_e="25N" end latitude
For 19.x_exp, 1 extra var “yr” has to be defined.
- yr="2012"
There’re 3 optional vars you can add, if you have large domain (and want to subsample) or encounter memory problem with ferret.
- lon_i : longitude interval, default is 0.08, use larger if needed
- lat_i : latitude interval , default is 0.08, use larger if needed
- mem : ferret memory cache, default is 300 (MegaWords), use larger if needed
Once you finish, execute listdate.sh, and it will generate listHYCOM.jnl for whole record list of experiment.
Edit time range in listHYCOM.jnl if you wish.
Then execute dlHYCOM.sh, and all your nc files will be in “output/”.
If any bad situation happened, such as TMAP error or disconnection,
please check ncfile (including size) in output directory first,
and DO DELETE the line which already successfully download in listHYCOM.jnl!
Then type: dlHYCOM.sh again!
The download script is designed to get all variables into 3 files (EL_*.nc, ST_*.nc, UV_*.nc) for SCHISM.
Once you gather all you need, simply use nco command to cat your ncfiles.
For example: ncrcat EL_*.nc EL_final.nc
Then you can use "gen_hot_3Dth_from_hycom.f90" to generate your initial & open boundary conditions for SCHISM.
Enjoy!
