Using the above figure, calculate the average surface ocean concentration of CO2 in 1970 and in 2010. What is the percent increase in CO2 concentration in the oceans over this period? Assuming the average surface ocean temperature is 15oC. Why is the effect called ocean acidification?

420 Atmospheric co, at Mauno Loo Observatory Scripps Institution of Oceanography NOAA Global Monitoring Laboratory 400 TH 380 T parts per million (ppm) 360 T 340 , 320 SCRIPPS OCEANOGRAPHY UC San Diego 444 1960 1970 1980 2000 2010 2020 1990 Year