# What is the mean amount (in grams) of dissolved carbon in a ton of sea water?

What is the mean amount (in grams) of dissolved carbon in a ton of sea water ?

1. The value I want is the concentration value in say the first two metres of surface water (A distribution of this concentration by depth would also help)
2. If I take say the 10% surface area where the CO2 concentration is the highest on the globe, what does it change about the result ?