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Ocean AcidificationWill the reef survive?

http://www.noaanews.noaa.gov

Carbonate Shell Activity

Follow the directions on the ocean acidification shell activity.Complete steps 1-4.Than sit down and await further instructions.

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Ocean’s of Rootbeer

• Dry ice -110 degrees• What is it?

– CO2

• What is the “smoke”– Water vapor

• How does it get to this phase– Sublimation – Solid to gas without passing

through liquid phase

• Factors that speed reaction– Surface area– Temperature– Pressure– Concentration

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Safety

• Wear safety glasses• Do NOT touch dry ice! It is so cold it will burn

you. Instant frost bite can occur.• Do not drink to soda you make until all of the ice

has sublimated. Place your labeled cup on the front lab counter when step 6 has been completed.

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http://www.independent.co.uk

The burning of fossil fuels releases

11 BILLION TONS of carbon dioxide into the atmosphere every year.

http://www.babble.com

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www.physicalgeography.net

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Atmospheric CO2 Today: 395.28ppm

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Carbon dioxide dissolves in the ocean, where it causes a potentially more serious problem ocean acidification.Ocean acidification refers to a reduction in the pH of the ocean over an extended period time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere

Hoegh-Gulderg et al. 2007

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Ocean acidification poses a threat to shell-forming organisms like corals and calcifying plankton.

www.greendiary.comhttp://elrid.cult.bg

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The pH Scale

A small change in pH is equal to a LARGE change in acidity.

www.thegardenersresource.com

AC

IDS

BA

SE

S

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CO2 + H2O

CO2 + CO32- + H2O

carbonate ions

Carbonic acid reduces

ocean pH.

The concentration of carbonate

ions decreases.

H2CO3

carbonic acid

2HCO3 –

bicarbonate ions

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www.divegallery.com

www.noaanews.noaa.govwww.greendiary.com http://elrid.cult.bg

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www.travel-vancouver-island.com

www.bigmoviezone.com

www.noaanews.noaa.gov

http://elrid.cult.bg

www.nceas.ucsb.edu

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http://www.noaanews.noaa.gov

• Factors that speed reaction– Surface area– Temperature– Pressure– Concentration

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