event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
959    71    5      07202010  8.87698    -88.46245   2      16-1    1.892980    0.111185    
959    71    5      07202010  8.87698    -88.46245   12     16-2    2.080319    0.129036    
959    71    5      07202010  8.87698    -88.46245   20     16-3    14.165744   0.124143    
959    71    5      07202010  8.87698    -88.46245   25     16-4    20.900538   0.133048    
959    71    5      07202010  8.87698    -88.46245   40     16-5    23.932637   0.152857    
959    71    5      07202010  8.87698    -88.46245   50     16-6    26.987858   0.129412    
959    71    5      07202010  8.87698    -88.46245   70     16-7    30.070930   0.158340    
959    71    5      07202010  8.87698    -88.46245   90     16-8    29.621161   0.156093