event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
788    61    4      07162010  8.53455    -90.324     2      13-1    0.853524    0.090459    
788    61    4      07162010  8.53455    -90.324     12     13-2    1.146332    0.055525    
788    61    4      07162010  8.53455    -90.324     20     13-3    10.507404   0.021835    
788    61    4      07162010  8.53455    -90.324     30     13-4    22.246911   0.041936    
788    61    4      07162010  8.53455    -90.324     40     13-5    27.791244   0.070987    
788    61    4      07162010  8.53455    -90.324     50     13-6    29.833263   0.053813    
788    61    4      07162010  8.53455    -90.324     60     13-7    31.079734   0.051042    
788    61    4      07162010  8.53455    -90.324     80     13-8    32.243041   0.050011