depth,n2,chla,zone
0,8.576029123,0.015367701,2
0.25,10.92969308,0.013112129,2
0.5,8.815486471,0.014057487,2
0.75,7.62005474,0.012980095,2
1,11.89320388,0.012123169,2
1.25,7.227991503,0.011720188,2
1.5,8.373205742,0.011396874,2
1.75,6.7589936,0.010730439,2
2,4.342431762,0.01065384,2
2.25,,0.010842315,
2.5,3.480904751,0.01081611,1
3,1.670211606,0.009201031,1
3.5,1.638576779,0.008869216,1
4,1.727493231,0.008125393,1
4.5,1.071966117,0.007161104,1