9 INTEGER
jfiltnu ! index of the last lat line filtered in NH (U grid)
10 INTEGER
jfiltsu ! index of the first lat line filtered in SH (U grid)
11 INTEGER
jfiltnv ! index of the last lat line filtered in NH (V grid)
12 INTEGER
jfiltsv ! index of the first lat line filtered in SH (V grid)
13 INTEGER
modfrstu ! number of retained (ie: unfiltered) modes on U grid
14 INTEGER
modfrstv ! number of retained (ie: unfiltered) modes on V grid