Greenhouse Gas: Carbon Dioxide Thuan, Marko. Carbon Dioxide (CO 2 ) Colorless & odorless gas Ice Age (400 kyBCE) - 185 ppm Preindustrial (1700s) - 278.

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Presentation transcript:

Greenhouse Gas: Carbon Dioxide Thuan, Marko

Carbon Dioxide (CO 2 ) Colorless & odorless gas Ice Age (400 kyBCE) ppm Preindustrial (1700s) ppm Global average (June ‘11) ppm Natural state of CO 2 ?

Natural Variations of CO 2 Sinks Photosynthesis Ice The World’s Oceans Sources Combustion Volcanoes, Forest Fires Carbonate Rocks Increase of CO2 associated with seasonal cycles Positive feedback

Anthropogenic Changes Ice core sampling 228 ppm to 391 ppm Rapid climate change Over short period CO 2 Levels expected to increase

Vostok Ice Core Data 391ppm (2011)