Your SlideShare is downloading. ×
0
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Oceans
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Oceans

912

Published on

Published in: Technology, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
912
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
27
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Oceans Chapters 15.2 – 15.3
  • 2. Goal 1 Discuss the chemical and physical properties of seawater
  • 3.
    • Gases
    • Nutrients
    • Salts (see table 15-1 page 392)
      • Salinity 35 ppt = 3.5%
      • Salt ions
        • Chloride
        • Sodium
        • Sulfate
        • Magnesium
        • Calcium
  • 4.
    • Salinity Varies (figure 15-10 page 393)
      • High salinity (up to 37 ppt)
        • Evaporation
        • Hot
        • Low precipitation
  • 5.
      • Low salinity (down to 32 ppt)
        • Low Evaporation
        • High precipitation
        • Freshwater influx
          • Glacier melt
          • River mouth
  • 6. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Winkel-tripel-projection.jpg
  • 7.
    • Salinity affects Physical Properties
      • More dense than freshwater
        • Freshwater = 1.00 g /mL
        • Seawater = 1.02 g/mL to 1.03 g/mL
      • Lower freezing point
        • Fresh water = 0° C
        • Seawater = -2° C
  • 8.
    • Seawater absorbs light (see figure 15-14 page 396)
      • RYO (Long wavelengths) 50 m
      • Green to 100 m
      • Average depth of oceans 3720 m
      • Photosynthesis occurs where??
  • 9. Goal 2 Explain ocean layering (See page 397)
  • 10.
    • Basis of ocean layering:
      • Warm water  less dense  floats
      • Cold water  more dense  sinks
  • 11.
    • Ocean is divided into 3 layers
      • Surface layer
      • Thermocline
      • Bottom layer
    • Layers determined by temperature characteristics
  • 12.
    • Temperature decrease with depth
    • Surface layer (top layer)
      • Warm
      • ~ 100 m depth
      • Equator
      • Nonexistent at poles
  • 13.
    • Thermocline (middle layer)
      • Temperature rapidly decreases
      • Depth location varies
      • Nonexistent at poles
  • 14.
    • Bottom layer (bottom layer)
      • Very cold <4° C
      • Near freezing temps
      • Depth varies
  • 15. Image credit: PD-personal http://en.wikipedia.org/wiki/Image:Thermocline.jpg Surface layer Thermocline Bottom layer
  • 16. Goal 3 Explain deep water masses
  • 17.
    • Deep water mass formation
      • Polar areas
        • Cold Salty water = very dense
        • Salts do not freeze out of water
        • Sinks
        • Migrates toward equator
  • 18.
    • Three major water masses
      • Antarctic Bottom Water
        • Antarctic winter
        • Freezing , salt concentration
        • Coldest
        • Most dense
  • 19. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Winkel-tripel-projection.jpg Antarctic Bottom Water
  • 20.
      • North Atlantic Deepwater
        • Greenland Winter
        • Freezing, salt concentration
        • 2 nd Coldest
        • 2 nd most dense
  • 21. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Winkel-tripel-projection.jpg North Atlantic Deep Water
  • 22.
      • Antarctic Intermediate Water
        • Antarctic winter
        • Temperature decrease
        • Least cold deep water mass
        • Least dense deep water mass
  • 23. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Winkel-tripel-projection.jpg Antarctic Intermediate Water
  • 24.
    • Atlantic ocean
      • Affected by all 3 deep water masses
    • Pacific Ocean
      • Affected by only 2
      • Which one does not ???
  • 25. Goal 4 Understand movement of water via ocean currents
  • 26.
    • Density currents
      • Driven by
        • Cold, salty deep water currents
      • Great Ocean Conveyor Belt
  • 27. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Thermohaline_Circulation_2.png
  • 28.
    • Surface currents
      • Driven by global wind systems
  • 29. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Ocean_surface_currents.jpg
  • 30.
    • Gyres
      • Continents deflect surface currents
      • Northern Hemi = Clockwise
      • Southern Hemi = Counterclockwise
  • 31. Image credit: PD-gov http://en.wikipedia.org/wiki/Image:Oceanic_gyres.png
  • 32.
    • Upwelling
      • Cold bottom water deflects up continents
      • Pushed out by winds
      • West coasts & trade winds
      • Nutrient rich = fish
  • 33. Image credit: PD-gov http://cordellbank.noaa.gov/images/environment/upwelling_470.jpg

×