event  cast  cycle  date      event_lat  event_lon   depth  sample  nitrate     NO3_uptake  
513    41    3      07092010  10.41583   -92.91719   2      8-1     0.390475    0.064315    
513    41    3      07092010  10.41583   -92.91719   12     8-2     0.754528    0.056977    
513    41    3      07092010  10.41583   -92.91719   20     8-3     2.452268    0.060813    
513    41    3      07092010  10.41583   -92.91719   30     8-4     26.735230   0.042941    
513    41    3      07092010  10.41583   -92.91719   45     8-5     29.808168   0.056178    
513    41    3      07092010  10.41583   -92.91719   60     8-6     31.264587   0.036553    
513    41    3      07092010  10.41583   -92.91719   80     8-7     30.808041   nd          
513    41    3      07092010  10.41583   -92.91719   100    8-8     32.155509   nd