Amazonian Deforestation and Increased Carbon Dioxide Release By: Rocky Soeharyo David Palay Claire Barco GC1 Lab section 3
Roadmap • Hypothesis. • Things to consider. -photosynthesis -Amazônia -Deforestation • What we did… • What this means…
Deforestation leads to an increased release of CO² into the atmosphere…but by how much?
Photosynthesis http://www.eia.doe.gov/kids/energyfacts/sources/renewable/biomass.html Photosynthesis takes CO² out of the atmosphere, and adds O²
Amazônia • Amazonia covers most of Brazil and parts of Peru, Bolivia, Columbia, Venezuela, and Ecuador • Dense forest with enormous biodiversity • Important to global climate regulation…
Deforestation • Before 1970, an area the size of Portugal had already been deforested. • Since then, deforestation has increased due to globalization factors… Ometto JP et al.
Deforestation, con’t • Most trees are simply burned to clear land for cattle or soybean crops. • Burning releases more CO² than logging.
The problem: Burning releases CO². Less trees means less photosynthesis. Deforestation leads to more CO² with less trees to take it out.
What we did… • Through our research, we found multiple estimates of deforestation and burning rates, along with estimates of the size of Amazônia and how much carbon is held per hectare. • We used these estimates to calculate how much CO² is added to the atmosphere through deforestation.
our process: • Rate of deforestation and how long its been going on • Rate * Time = Total Deforested Area • Carbon release from combustion • Carbon released per area * Total Deforested Area = Gross Carbon Release • Photosynthetic uptake of carbon • Gross Carbon Release – Photosynthetic Uptake = Net Carbon Flux = .397 PgC/year! • Only 0.0529% of carbon in in the atmosphere.
Graphs: Carbon level in the atmosphere goes from 747 Pg to 769
In the future… • If rates of logging and burning were to continue as they were in the years 1999-2003 until 2049, the amount of carbon in the atmosphere would increase from 747 Pg to 1034 Pg. That is a contribution of 287 Pg in 50 years. This could have grave results.