Carbon Dioxide and Carbonate system Carbon cycle Why

Carbon Dioxide and Carbonate system Carbon cycle - Why is it important? 1. Regulates temperature of the planet 2. Important for life in the ocean 3. Regulates the p. H of water

How much CO 2 can you sink in the ocean? Chemical Process that control CO 2 absorption in the ocean Biological Physical Carbon Cycle

Carbon Cycle

CO 2 Temperature

CO 2 changes in the last 300 yr

CO 2 changes in the last 50 yr Oceans Biosphere Rock Weathering

Greenhouse effect • Caused by gases such as CO 2 and water vapor that allow sunlight to pass through but trap heat energy (infrared) before it is reradiated back in space! • Greenhouses gasses are increasing due to human activities – increasing the average global temperature and causing global worming; • How and what are the effects?

The Carbonate System sources of inorganic carbon from dissolved CO 2 gas from dissolution of Calcium Carbonate NOTE: Biology and Physics participate in the equilibrium of the carbonate system

CO 2 in the ocean

Carbon Dioxide and Carbonate system Carbonic Acid Bicarbonate Ion Carbonate

Carbon Dioxide and Carbonate system High p. H + - Low p. H

Distribution of Carbon species in water + -

Control of p. H very rapid reaction in seawater at equilibrium Equilibrium constant hydrogen ion concentration

hydrogen ion concentration + -

Concept of Alkalinity

Why is the p. H of seawater close to neutral? seawater p. H=7. 5 -8. 5 Average is 8. 1