[[PageOutline]] Last edited [[Timestamp]]

'''Author''' : Gurvan Madec

'''ticket''' : #1751

'''Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2016//dev_r6711_SIMPLIF_6_aerobulk ​2016/dev_r6711_SIMPLIF_6_aerobulk]

'''WP2016 Action''' : SIMPLIF-6

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=== Description ===
Development branch related to Simplification / Enhancement of bulk formula in NEMO/OPA

'''Purpose''':

Replacement of the current 3 bulk formula packages (sbcblk_core, sbcblk_clio, sbcblk_mfs) by a single generic package, [http://aerobulk.sourceforge.net/ ​aerobulk], developed by L. Brodeau.

The new package has a single interface (i.e. namelist namsbc_blk) that gives access to the three following bulk formula:

 * COARE algorithm version 3 (Fairall ''et al.'' 2003) and version 3.5 (Edson ''et al. ''2013)
 * NCAR algorithm (Large & Yeager 2004, 2008) (the so-called CORE bulk formula)
 * ECMWF algorithm

'''Notes''':

 * CLIO bulk formula is removed from the system
 * CORE bulk formula is renamed NCAR bulk formulea
 * COARE and ECMWF are two newly introduced bulk formula in NEMO
 * ECMWF bulk are recommended bulk when using ERA input atmospheric data

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=== Strategy ===
'''STEP 1 : '''

Start from trunk at revision [https://forge.ipsl.jussieu.fr/nemo/changeset/6711 ​r6711] and from Laurent Brodeau' Aerobulk package adapted to NEMO.

{{{
svn co svn://svn.code.sf.net/p/aerobulk/code/branches/NEMOGCM_trunk 
}}}
and simply follows the instruction given in "NEMOGCM_trunk/changes.txt" :

{{{
sbcblk_core => sbcblk

remove mfs and clio !

sbcmod: rm CLIO, MFS
     ln_blk_core => ln_blk
     jp_core => jp_blk
     
Namelist:
namsbc: remove ln_blk_clio and ln_blk_mfs, change ln_blk_core to ln_blk
namsbc_core => namsbc_blk
}}}
More precisely :

[[BR]]In SBC directory,

 * remove sbcblk_core, sbcblk_clio, and sbcblk_mfs
 * add sbcblk.F90 from NEMOGCM_trunk/SBC
 * add sbcblk_algo_coare, ..._coare3p5, ..._ecmwf, and ..._ncar  from NEMOGCM_trunk/SBC
 * sbcmod.F90 : update from the one found in NEMOGCM_trunk/SBC
 * sbcice _cice, _lim_2, and _lim .F90  : mostly replace ln_blk_core by ln_blk
 * sbc_oce.F90 : update from the one found in NEMOGCM_trunk/SBC
 * cyclone.F90 : comment changes only
 * sbcwave.F90 : mostly replace ln_blk_core by ln_blk

[[BR]]In DIU directory,

 * cool_skin.F90  : style + replace ln_blk_core by ln_blk
 * step_diu.F90   : idem

[[BR]]Namelist,

 * Namelist_ref : 


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'''TO BE DONE :'''

 * add 3 logical replacing the test : nn_components == jp_iam_nemo, jp_iam_opa, and jp_iam_sas   (used in fldread.F90, sbccpl.F90, and sbcmod.F90), which declaration should be in abc_oce.F90

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