Since this is not my area of expertise, I searched Google under the key words "'carbon sink' ocean" to get these possible sources:
http://en.wikipedia.org/wiki/Carbon_dioxide_sink
http://harvardmagazine.com/2002/11/the-ocean-carbon-cycle.html
http://www.medicalnewstoday.com/articles/71416.php
http://science.hq.nasa.gov/oceans/system/carbon.html
http://climateprogress.org/2007/10/22/big-news-the-ocean-carbon-sink-is-saturating/
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.
Why is the ocean described as the world’s largest carbon sink?
Sink/Sources in the carbon cycle?
Carbon movement through the marine carbon cycle.
Help
3 answers
Phytoplankton
Woods wrong btw