envierment
ardam
CarbonCycle2022-Live.pptxThe Carbon Cycle
News
https:// www.nature.com/articles/d41586-022-02954-8?utm_source=Nature+Briefing&utm_campaign=ca6350b575-briefing-dy-20220921&utm_medium=email&utm_term=0_c9dfd39373-ca6350b575-45932158#author-0
https://mywaterway.epa.gov/community/Clark%20Athletic%20Center%20Umass%20Boston,%204928%20Univ%20Dr,%20Boston,%20MA,%2002125,% 20USA/overview
https:// www.latimes.com/science/story/2022-09-20/how-an-effort-to-reduce-fossil-fuel-use-led-to-another-environmental-problem-light-pollution
https:// www.bbc.com/news/uk-62986077
https:// www.theguardian.com/power-of-green/ng-interactive/2021/jan/12/renewable-energy-transition-offshore-wind
Residence Time
Hot Tub is 1000 liters
Pumps 10 liters/min through filter
How long does it take to filter all the water?
Write the equation to describe calculation.
Residence Time = Amount/ Rate
Breakout Groups
Make sure everyone understands the equation and units
(Share Screen/Annotate)
Hot Tub Residence Time
Ocean Residence Time
Ocean is 1021 liters of water
Rivers add 4 x 1016 liters of water per year
How long does water stay in the ocean before it is re-circulated through land?
RT = Amount/Rate
Breakout Groups
Ocean Residence Time
Zoom Poll: Photosynthesis
A) is only carried out by plants
B) is always limited by light
C) in the ocean is much more than on land
D) is sometimes decreased by UV light
E) is sometimes carried out at depths below 4000 meters in the ocean
Photosynthesis
Where does the mass of a tree come from?
CO2 + H2OCH2O + O2
Zoom Poll: Respiration
A) only occurs on land
B) only occurs in the ocean
C) is the same reaction as in your car
D) always balances photosynthesis
E) only occurs in animals
Respiration
Mitochondria, bacteria, fires, combustion engines
O2 + CH2OCO2 + H2O
Fossil Fuels burned at 20,000 times natural rates of oxidation
Atmospheric Measurements
The Carbon Cycle-revised
Mass Balance
Total mass is always conserved
Each element is also conserved in a closed system
Can you design a closed system that is sustainable indefinitely?
Eco-sphere.com
David Latimer, 1972
Biosphere 2
http://www.b2science.org/
7 people, O2 began to drop
Why?
Eco-Sphere
