Transcript of Oceanic Carbon Cycle Upwelling brings nutrients (e.g. PO 4 ) to euphotic zone Photosynthesis...
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- Oceanic Carbon Cycle Upwelling brings nutrients (e.g. PO 4 ) to
euphotic zone Photosynthesis (Dissolved Inorg Particulate Organic
Matter) Recycling and consumption Sinking of particulate matter
Remineralization (POM dissolved inorganic forms) S. Doney
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- Marine Productivity Upwelling brings from below the mixed
layer: Nutrients and DIC increase pCO 2 Cold water decrease pCO 2
Chavez et al.
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- DIC = CO 2 + HCO 3 - + CO 3 = 1-2 % 90% CO 2 DIC, NO3 depth atm
remineralization photosyn From the Atmospheres Perspective: 90 Pg
C/yr
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- Terrestrial Carbon Cycle Growth, mortality, decay Population:
{ages} Photosynthesis (climate, CO 2, soil H 2 O, resource
limitation) Decay (T, soil H 2 O,..) 120 PgC/yr60 1200 PgC 800
PgC
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- Impact on Atmospheric CO 2 Photosynthesis Respiration JanDec
From Atm To Atm CO 2 Flux Seasonal asynchrony between
photosynthesis and decomposition net fluxes of CO 2 to and from atm
seasonal cycle of CO 2 in atm Annual imbalance carbon
source/sink
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- NOAA Observatories South Pole American Samoa MaunaLoa Pt
Barrow, AK
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- NOAA-CMDL ~ 100 sites at remote marine locations Long-term
increase Seasonal cycle N-S gradient Atm CO 2 measurements
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- Atmospheric CO 2 Budget Atmospheric Increase Fossil Fuel
Emissions Land and Ocean Sinks Land & ocean sinks ~ 50% of FF
emission sensitive to climate perturbations
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- Total CO 2 Emission: 1997 USA China Russian Federation
JapanIndia Germany UK Canada
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- Amazon-fishbone
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- PerCapita CO 2 Emission: 1997
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- Depletion of Atm Oxygen: Burning of Fossil Fuels long term
decrease Decomposition of Organic Carbon seasonal cycle
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- Vostok a station on Antarctica: Analysis of ice and gas bubbles
trapped in ice yields past climate history of last 460,000 years
Temperature Departure (K)
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- Annual GHG Emissions per Vehicle
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