depth,age,n2,chla,zone
0,2006,4.052534074,0.093739354,1
0.25,2000,4.97199448,,1
0.5,1994,5.936803334,,1
0.75,1988,4.487837046,,1
1,1981,3.936628318,0.106377996,1
1.25,1980,4.194343628,,1
1.5,1978,3.5134515,,1
1.75,1976,2.938354521,,1
2,1974,3.304202406,0.113737001,1
2.25,1972,3.534333526,,1
2.5,1970,2.732545171,,1
2.75,1969,3.772480907,,1
3,1967,3.893090955,0.123202891,1
3.25,1965,4.297642436,,1
3.5,1964,4.450661241,,1
3.75,1962,3.281367192,,1
4,1961,3.609523248,0.121534306,1
4.25,1959,3.652355397,,1
4.5,1957,4.702495202,,1
4.75,1955,4.052534074,,1
5,1953,4.402673951,0.163604409,1
5.25,1951,4.75137693,,1
5.5,1948,5.398378283,,1
5.75,1946,4.579439252,,1
6,1944,4.387221546,0.127494709,1
6.25,1943,2.53749275,,1
6.5,1942,5.309926311,,1
6.75,1942,4.918098603,,1
7,1941,4.002483173,0.094388128,1
7.25,1936,3.337147216,,1
7.5,1932,4.653901679,,1
7.75,1928,4.810335349,,1
8,1923,5.264741276,0.111975514,1
8.25,1918,5.315917375,,1
8.5,1912,4.595243454,,1
8.75,1906,4.13376527,,1
9,1900,4.473741874,0.159941646,1
9.25,1897,4.177465557,,1
9.5,1895,4.846878215,,1
9.75,1892,4.935933597,,1
10,1890,5.056550813,0.127782834,1
10.25,1887,5.116531618,,1
10.5,1884,4.526308011,,1
10.75,1882,4.611851517,,1
11,1879,4.852638251,,1
11.25,1877,5.17357885,,1
11.5,1874,4.203555007,,1
11.75,1872,3.394292048,,1
12,1869,5.046967699,0.149671196,1
12.25,1866,4.46493658,,1
12.5,1864,4.641206335,,1
12.75,1861,4.586984198,,1
13,1859,4.259684262,,1
14,1848,4.800532957,0.0682551,1
15,1838,5.143169032,,1
16,1828,4.951095304,,1
17,1818,4.155359566,,1
18,1807,4.544779996,,1
19,1797,4.259388039,,1
20,1787,3.359846407,0.062886417,1
22,1766,3.918996737,,1
24,1746,3.321223295,,1