1. OCEANS

3. Hypsometric Curve

4. EUSTATIC SEALEVEL CONTROLS

5. LOCAL SEALEVEL CONTROLS
Subsidence
Tectonism (mtn building)
Isostatic adjustment

7. GROUP PRS
Why is sealevel in Sitka falling?
Mountain building
B. Distance to equator C. Glacial melting
D. Mid-ocean spreading
E. Local subsidence

13. Greenland ice melts = 5 m rise

15. What impact would a .5-1 m sealevel rise have on the US?
Given that we may not know how much it will rise for another years, what if anything, do we do now?

16. OCEANS
TIDES

17. Spring Tides
Neap Tides

18. PRS
If the moon was twice as far away the tides would be
A. Larger B. Smaller C. No change

19. Tides affected by shoreline shape

20. Tides affected by latitude

21. PRS
If the Bay of Fundy was on the equator how would the highest tides be affected?
A. Higher B. Lower C. No change

22. WAVES

23. Generated by wind
speed, duration, fetch
Wavebase = ½ wavelength

25. Shore profile is dynamic equilibrium

29. Wave Refraction
waves bend toward slower medium

31. Wave energy focused on headlands = erosion
Wave energy dispersed in bays = deposition

32. Wave refraction generates longshore current

33. Creates Spits
Alligator point

34. PRS
Which way is the longshore current flowing?
To the North B. To the South
C. To the East D. to the West E. Can’t tell

35. Barrier Islands
How formed?
Cutoff Spit
Drowned Dunes
Exposed Sand Bar

42. PRS
Overwash causes barrier islands to move in which direction?
Toward shore B. Toward the ocean
C. Parallel to the coast

43. Coastal Engineering
Seawalls

44. Beach Armor – Rip-Rap

46. Groins, jetties

47. Which way is the longshore current flowing?
PRS
Which way is the longshore current flowing?
A. To the North B. To the South
C. To the East D to the West E. Can’t tell

48. Beach Nourishment

51. GROUP PRS
Why has the southern part of the island migrated onshore?
Change of wave direction
Development on southern island
Rise in sealevel
Inlet jetties
Change in longshore current

52. Rip Currents

53. Convection

54. ITCZ = Inter Tropical Convergence Zone - Low pressure
Rising air cools and rains

56. Note the pronounced shift in the ITCZ over India. What causes this?

57. PRS
The shift is caused by
Plate tectonics B. Eccentricity in earth’s orbit
C. Atmospheric CO2 D. Asia
E. Human interference

58. Coriolis effect

59. Convection cells and zonal wind flow