Download presentation
Presentation is loading. Please wait.
Published byRuby Martin Modified over 9 years ago
1
Warm Up Name 2 processes that drive ocean currents.
2
Ocean Currents
3
Movement of Ocean Water Oceans are always in constant movement caused by: Variations in Density Wind
4
Specific Heat of Water Water has a high specific heat (4.184 J/g*C) It takes a lot of energy to heat up water and cool it down
5
Density Currents Density Currents-Ocean Currents that move due to differences in density Global Conveyor Belt
6
Ocean Currents Upwelling Currents – Occur when wind moves seawater at the surface and new water from below replaces it
7
Critical Thinking #1 How might upwelling currents be beneficial to life in the ocean? Explain.
8
Coriolis Effect Coriolis Effect-The rotation of the Earth results in wind blowing in a circular motion Wind blows to the right in the Northern Hemisphere Wind blows to the left in the Southern Hemisphere
9
Gyres Gyres are large circular current systems that flow from north to south and are caused by the Coriolis Effect 5 major gyres: 2 in the Pacific Ocean 2 in the Atlantic Ocean 1 in the Indian Ocean
10
Surface Currents Surface Currents are currents that affect the upper most portions of the surface Surface Currents that flow towards the equator generally bring cold water Surface Currents that flow away from the equator generally bring warm water
11
Ocean Currents Deep Currents – Move slowly beneath surface, primarily caused by differing water densities
12
Critical Thinking #2 What processes might cause changes in density that form deep ocean currents?
14
Climate Impact Coastal Areas: Have a high amount of water vapor in the air. Summer will be cooler Winters will be warmer
15
Climate Impact In cities located further from the coast there is less water vapor in the air Summers will be very hot Winters will be very cold
16
Tides Tides – Daily changes in the level of the ocean surface 2 high tides and 2 low tides each day caused by gravitational pull of primarily the moon, but also the sun
17
High Tides and Low Tides High (Flood) Tides – Occur on side of Earth facing and opposite the moon, due to both gravity facing and centrifugal force opposite Low (Ebb) Tides – Occur on sides halfway between the moon
18
Spring Tides and Neap Tides Neap Tides = Small tidal range, when moon and sun are perpendicular Spring Tides = Highest and lowest tides, when moon and sun align
19
Critical Thinking #3 Why are spring tides stronger than neap tides? Explain.
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.