Your SlideShare is downloading. ×
0
The Effects of Global Warming on the Marine Environment
How Global Warming Works <ul><li>The mechanism for global warming  </li></ul><ul><li>is the Greenhouse Effect </li></ul><u...
How Global Warming Works
How Global Warming Works <ul><li>CO 2  is the most important </li></ul><ul><li>greenhouse gas </li></ul><ul><li>CO 2  is r...
How Global Warming Works <ul><li>CO 2  levels have increased 30% since </li></ul><ul><li>before the Industrial Revolution ...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Changes to Ocean Temperature <ul><li>If atmosphere warms, ocean warms </li></ul><ul><li>Most marine organisms spa...
Impacts: Changes to Ocean Temperature <ul><li>Phytoplankton bloom in response to  light and temperature cues </li></ul><ul...
Impacts: Changes to Ocean Temperature <ul><li>Migrations are in response to temperature </li></ul><ul><li>May impact fishe...
Impacts: Changes to Ocean Temperature <ul><li>coral bleaching </li></ul><ul><ul><li>as reefs become warmer, corals expel s...
Impacts: Changes to Ocean Temperature <ul><li>hypoxia  – low levels of dissolved oxygen </li></ul><ul><ul><li>warmer water...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Changes to Ocean  Currents <ul><li>like a giant conveyor belt – carrying warm  </li></ul><ul><li>and cold water f...
Impacts: Changes to Ocean Currents <ul><li>carry different temperature water </li></ul><ul><li>currents moderate coastal c...
Impacts: Changes to Ocean Currents <ul><li>ocean currents: </li></ul><ul><li>transport planktonic (drifting) organisms </l...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Localized Salinity Changes <ul><li>salinity  – measure of dissolved solids </li></ul><ul><li>in water </li></ul><...
Impacts: Localized Salinity Changes <ul><li>glaciers are fresh water </li></ul><ul><li>melting will locally decrease salin...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Sea Level Rise <ul><li>water in glaciers is on land  </li></ul><ul><li>as glaciers melt, water is added to ocean ...
Impacts: Sea Level Rise <ul><li>destroys coastal habitats </li></ul><ul><li>ex: salt marshes, mangroves </li></ul><ul><li>...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts:   Ocean Acidification <ul><li>CO 2  absorbed by the ocean makes it more acidic  </li></ul><ul><li>can kill phytop...
Impacts:   Ocean Acidification <ul><li>calcium carbonate (CaCO 3 ) shells dissolve or are harder to make – organisms canno...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Increase in Severe Weather Events <ul><li>hurricanes need warm water to form </li></ul><ul><li>warming of ocean w...
Impacts: Increase in Severe Weather Events <ul><li>increased strength and number of hurricanes can lead to: </li></ul><ul>...
Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized...
Impacts: Invasive Species, Changes to Habitats and Food Supply <ul><li>invasive species  – non-native species that adverse...
Impacts: Invasive Species, Changes to Habitats and Food Supply <ul><ul><li>all impacts can result in the loss of coastal a...
Upcoming SlideShare
Loading in...5
×

The effects of global warming on the marine

2,388

Published on

Published in: Education
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,388
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
88
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide
  • http://seagrant.gso.uri.edu/factsheets/fserosion.html
  • Transcript of "The effects of global warming on the marine"

    1. 1. The Effects of Global Warming on the Marine Environment
    2. 2. How Global Warming Works <ul><li>The mechanism for global warming </li></ul><ul><li>is the Greenhouse Effect </li></ul><ul><li>Greenhouse gases include carbon </li></ul><ul><li>dioxide (CO 2 ), methane (CH 4 ), </li></ul><ul><li>CFCs, nitrous oxide (N 2 O), ozone </li></ul><ul><li>Greenhouse gases prevent infrared </li></ul><ul><li>radiation from escaping to outer </li></ul><ul><li>space and it is converted to heat, </li></ul><ul><li>thereby increasing atmospheric </li></ul><ul><li>temperatures </li></ul>
    3. 3. How Global Warming Works
    4. 4. How Global Warming Works <ul><li>CO 2 is the most important </li></ul><ul><li>greenhouse gas </li></ul><ul><li>CO 2 is released from the </li></ul><ul><ul><li>burning of fossil fuels – </li></ul></ul><ul><ul><li>coal, oil, natural gas </li></ul></ul><ul><li>CO2 is easily absorbed by </li></ul><ul><li>the oceans – up to a point </li></ul><ul><ul><ul><li>- dissolves in water </li></ul></ul></ul><ul><ul><ul><li>- used in photosynthesis </li></ul></ul></ul>
    5. 5. How Global Warming Works <ul><li>CO 2 levels have increased 30% since </li></ul><ul><li>before the Industrial Revolution </li></ul>
    6. 6. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    7. 7. Impacts: Changes to Ocean Temperature <ul><li>If atmosphere warms, ocean warms </li></ul><ul><li>Most marine organisms spawn (reproduce) in response </li></ul><ul><li>to temperature cues – </li></ul><ul><li>will reproduce at wrong </li></ul><ul><li>time </li></ul>
    8. 8. Impacts: Changes to Ocean Temperature <ul><li>Phytoplankton bloom in response to light and temperature cues </li></ul><ul><li>Changes will impact </li></ul><ul><li>food webs </li></ul>
    9. 9. Impacts: Changes to Ocean Temperature <ul><li>Migrations are in response to temperature </li></ul><ul><li>May impact fisheries </li></ul>
    10. 10. Impacts: Changes to Ocean Temperature <ul><li>coral bleaching </li></ul><ul><ul><li>as reefs become warmer, corals expel symbiotic algae and become “bleached” </li></ul></ul><ul><ul><li>leads to loss of habitat and food for reef-dependant species </li></ul></ul>
    11. 11. Impacts: Changes to Ocean Temperature <ul><li>hypoxia – low levels of dissolved oxygen </li></ul><ul><ul><li>warmer water temperatures increase the chances that available oxygen will be used up more rapidly by existing organisms </li></ul></ul>
    12. 12. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    13. 13. Impacts: Changes to Ocean Currents <ul><li>like a giant conveyor belt – carrying warm </li></ul><ul><li>and cold water from shallow to deep </li></ul><ul><li>and deep to shallow </li></ul><ul><li>global warming may stop/change this flow </li></ul>
    14. 14. Impacts: Changes to Ocean Currents <ul><li>carry different temperature water </li></ul><ul><li>currents moderate coastal climate </li></ul><ul><li>ex: England </li></ul>Gulf Stream Current
    15. 15. Impacts: Changes to Ocean Currents <ul><li>ocean currents: </li></ul><ul><li>transport planktonic (drifting) organisms </li></ul><ul><li>distribute eggs and larvae </li></ul><ul><li>bring food and oxygen to </li></ul><ul><li>sessile organisms </li></ul><ul><li>remove wastes and pollutants </li></ul>
    16. 16. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    17. 17. Impacts: Localized Salinity Changes <ul><li>salinity – measure of dissolved solids </li></ul><ul><li>in water </li></ul><ul><li>organisms have specific salinity ranges in </li></ul><ul><li>which they can survive </li></ul>
    18. 18. Impacts: Localized Salinity Changes <ul><li>glaciers are fresh water </li></ul><ul><li>melting will locally decrease salinity </li></ul><ul><li>and impact organisms </li></ul><ul><li>freshwater can also change deep sea </li></ul><ul><li>circulation </li></ul>
    19. 19. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    20. 20. Impacts: Sea Level Rise <ul><li>water in glaciers is on land </li></ul><ul><li>as glaciers melt, water is added to ocean </li></ul><ul><li>as water heats, it expands </li></ul><ul><li>both raise sea level world wide </li></ul>
    21. 21. Impacts: Sea Level Rise <ul><li>destroys coastal habitats </li></ul><ul><li>ex: salt marshes, mangroves </li></ul><ul><li>destroys human </li></ul><ul><li>property </li></ul><ul><li>increased pollution </li></ul><ul><li>decreased freshwater </li></ul><ul><li>supplies </li></ul>
    22. 22. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    23. 23. Impacts: Ocean Acidification <ul><li>CO 2 absorbed by the ocean makes it more acidic </li></ul><ul><li>can kill phytoplankton resulting in major food web effects </li></ul>
    24. 24. Impacts: Ocean Acidification <ul><li>calcium carbonate (CaCO 3 ) shells dissolve or are harder to make – organisms cannot survive </li></ul><ul><li>acidosis – build up of carbonic acid in organisms </li></ul>
    25. 25. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    26. 26. Impacts: Increase in Severe Weather Events <ul><li>hurricanes need warm water to form </li></ul><ul><li>warming of ocean waters may increase the number of hurricanes or their intensity </li></ul>
    27. 27. Impacts: Increase in Severe Weather Events <ul><li>increased strength and number of hurricanes can lead to: </li></ul><ul><li>- habitat destruction </li></ul><ul><li>- property destruction </li></ul>
    28. 28. Major Impacts <ul><li>Changes to ocean temperature </li></ul><ul><li>Changes to ocean currents </li></ul><ul><li>Localized salinity changes </li></ul><ul><li>Sea level rise </li></ul><ul><li>Ocean acidification </li></ul><ul><li>Increase in severe weather events </li></ul><ul><li>Invasive Species, Changes to Habitats and Food Supply </li></ul>
    29. 29. Impacts: Invasive Species, Changes to Habitats and Food Supply <ul><li>invasive species – non-native species that adversely affect a habitat </li></ul><ul><ul><li>warmer waters make it easier for invading species to gain a foothold </li></ul></ul><ul><ul><li>can consume or outcompete native species </li></ul></ul>invasive algae covering coral reef 
    30. 30. Impacts: Invasive Species, Changes to Habitats and Food Supply <ul><ul><li>all impacts can result in the loss of coastal and marine habitat, disruption of the food web and loss of biodiversity </li></ul></ul>
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×