depth,n2,chla,zone
0,12.91376766,0.03509256,2
0.25,11.53266805,0.029134129,2
0.5,13.78573036,0.018323012,2
0.75,7.602085143,0.014163666,2
1,4.006672336,0.01255608,1
1.25,2.297277023,0.012942102,1
1.5,1.662956125,0.013193681,1
1.75,2.41836775,0.013765856,1
2,1.278118609,0.0113208,1
2.25,1.574145464,0.012615502,1
2.5,1.752403296,0.011609758,1
2.75,1.887577429,0.010934077,1
3,2.048152483,0.010813262,1
3.5,2.915417202,0.010637144,1
4,3.244861199,0.011051606,1
4.5,2.242111428,0.010647486,1