event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
416    33    2      07062010  8.95414    -90.4911    2      6-1     1.528563    0.000000    
416    33    2      07062010  8.95414    -90.4911    12     6-2     1.677334    0.204268    
416    33    2      07062010  8.95414    -90.4911    20     6-3     9.967636    0.110894    
416    33    2      07062010  8.95414    -90.4911    30     6-4     19.925868   0.058624    
416    33    2      07062010  8.95414    -90.4911    40     6-5     29.270352   0.042397    
416    33    2      07062010  8.95414    -90.4911    50     6-6     27.048414   0.029648    
416    33    2      07062010  8.95414    -90.4911    60     6-7     31.873637   0.039593    
416    33    2      07062010  8.95414    -90.4911    80     6-8     32.344467   0.036861