1. OCEAN SALINITY, TEMPERATURE AND DENSITY

2. USE YOUR NOTES AND RAISE YOUR HANDS PLEASE.  Review Questions  Ocean floor features

3. SALINITY  Calculated as mass of salt/mass water  Most sea water is 3.5%

4. PRACTICE  What mass of salt would make a concentration of 10% salinity in 500g of water?

5. WHERE DOES THE SALT COME FROM?  Chemical weathering of rocks on the continents.  volcanic eruptions

6. PROCESSES THAT AFFECT SALINITY  Addition of freshwater- how does this happen?  Reduction of freshwater- what causes this?

7. WOULD SALINITY BE GREATER OR LESS THAN 3.5% HERE?

8. OCEAN TEMPERATURE  Primarily a function of latitude

9. TEMPERATURE ALSO VARIES WITH DEPTH.

10. WHAT DO YOU THINK THAT GRAPH MIGHT LOOK LIKE IN THE POLAR REGIONS? SKETCH IT IN YOUR NOTES.

11. SEA WATER DENSITY  Influenced by temperature and salinity  Temperature is the most important variable here.

12. QUESTIONS  What is the effect of increasing temperature?  What is the effect of increasing salinity?

13. OCEAN LAYERING  surface zone-warmest -solar radiation-300m 2% water  transition zone-temp goes down following the thermocline18% water  deep zone-no sun, cold 80% of ocean