E7 NITROGEN CONCENTRATION (2)

NO3-N [micro g l-1]
Station 2, 1964-1965
            Aug    Sep    Oct    Nov    Dec    Jan    Feb    Mar    Apr    May    Jun    Jul
 Surface    45     34     30     36     12     12     18     20      -     14     87     39
Circa 50m   123    106    34     134    107    121     -      -      -     15     26      -

Station 3, 1964-1965
            Jul    Aug    Sep    Oct    Nov    Dec    Jan    Feb    Mar    Apr    May    Jun
 Surface    28     38     13     27     32     17     23     18     21     30      -     18

Station 4, 1964-1965
            Sep    Oct    Nov    Dec    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug
 Surface    13     21     13     15     21     22     45     15     13     20     14     10
Circa 50m   91     86     92     112    180    133    111    74     117    71     21     49