date        treatment  temp  O2_nom  pCO2_nom  salinity  alkalinity  DIC    
2013-11-27  I          7     7.1     400       35        2183.2      2059.1  
2013-11-27  II         7     0.7     400       35        2294.5      2171.1  
2013-11-27  III        7     5.9     2000      35        2163.6      2198.0  
2013-11-27  IV         7     0.7     2000      35        2349.3      2381.4  
2013-11-27  V          7     4.9     275       35        2124.6      1908.0