event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
363    30    2      07052010  9.04045    -90.50417   2      5-1     1.526028    0.236157    
363    30    2      07052010  9.04045    -90.50417   12     5-2     8.165413    0.331071    
363    30    2      07052010  9.04045    -90.50417   20     5-3     22.384378   0.199220    
363    30    2      07052010  9.04045    -90.50417   30     5-4     27.498346   0.089303    
363    30    2      07052010  9.04045    -90.50417   40     5-5     29.819344   0.048520    
363    30    2      07052010  9.04045    -90.50417   50     5-6     31.022078   0.037102    
363    30    2      07052010  9.04045    -90.50417   60     5-7     31.741389   0.038258    
363    30    2      07052010  9.04045    -90.50417   80     5-8     31.701873   0.035389