Difference between revisions of "Ocean biogeochemical cycles"

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(New page: == '''Ocean Biogeochemical Cycles''' == (a) '''ocean acidification:''' due to invasion of fossil fuel CO2 into the ocean. right|300px (b) [...)
 
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(a) [[Ocean Acidification|'''ocean acidification:''']] due to invasion of fossil fuel CO2 into the ocean.
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Biogeochemistry is the study of the processes and cycles that transfer elements and energy around the Earth's environment. Part of the interest of these Jmodels (the first four of them) is that they aid examination and understanding of the workings of the ocean's biogeochemical cycles. Rather than trying to convey how they work through use of static pictures, understanding can come through manipulating and playing around with the models. Many people find this an easier way of understanding how these dynamical systems work.
  
[[Image:del_pH.png|right|300px]]
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The Jmodels can be used to understand aspects of ocean biogeochemistry, such as:
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(a) [[Limiting Nutrients|'''control over primary production:''']] primary production refers to the numbers of new algae that grow every year in the ocean. This sunlight-fuelled primary production is the basis of nearly all food chains in the ocean and powers many aspects of biogeochemical cycles. At the global scale it is controlled in turn by the availability and supply of nutrients.
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(b) [[Ocean Mixing Effect|'''effect of ocean mixing:''']] the models can be used to understand how oceanic nutrient cycles and primary production are affected at the global scale by changes in ocean circulation (mixing).
  
(b) [[Global Warming|'''global warming:''']] how increasing the greenhouse effect interacts with other components of the Earth’s radiation balance and heat reservoirs.
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(c) [[Ocean Acidification|'''ocean acidification:''']] due to invasion of fossil fuel CO2 into the ocean.
  
(c) [[Future Ocean Carbon Sink|'''future ocean C sink:''']] will any of the multiple ways in which the ocean is being changed make a large difference to how much CO2 it absorbs?
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[[Image:del_pH.png|right|300px]]
  
(d) [[Long-Term Legacy of Fossil Fuels|'''long-term CO2:''']] what legacy will our burning of fossil fuels leave behind for future generations, including our descendants living many thousands of years in the future?
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(d) [[Pipes in the Ocean|'''pipes:''']] it has recently been proposed that vertical pipes in the ocean could be used to lift up nutrient-rich deep water which would then fuel CO2 drawdown from the atmosphere. The models can be used to make a preliminary analysis of this proposal.
  
 
'''Further Reading:'''
 
'''Further Reading:'''

Revision as of 16:28, 20 March 2008

Ocean Biogeochemical Cycles

Biogeochemistry is the study of the processes and cycles that transfer elements and energy around the Earth's environment. Part of the interest of these Jmodels (the first four of them) is that they aid examination and understanding of the workings of the ocean's biogeochemical cycles. Rather than trying to convey how they work through use of static pictures, understanding can come through manipulating and playing around with the models. Many people find this an easier way of understanding how these dynamical systems work.

The Jmodels can be used to understand aspects of ocean biogeochemistry, such as:

(a) control over primary production: primary production refers to the numbers of new algae that grow every year in the ocean. This sunlight-fuelled primary production is the basis of nearly all food chains in the ocean and powers many aspects of biogeochemical cycles. At the global scale it is controlled in turn by the availability and supply of nutrients.

(b) effect of ocean mixing: the models can be used to understand how oceanic nutrient cycles and primary production are affected at the global scale by changes in ocean circulation (mixing).

(c) ocean acidification: due to invasion of fossil fuel CO2 into the ocean.

Del pH.png

(d) pipes: it has recently been proposed that vertical pipes in the ocean could be used to lift up nutrient-rich deep water which would then fuel CO2 drawdown from the atmosphere. The models can be used to make a preliminary analysis of this proposal.

Further Reading:

1. J.L. Sarmiento & N. Gruber (2006) Ocean Biogeochemical Dynamics, Princeton University Press.

2. W.S. Broecker & T.-H. Peng (1982) Tracers in the Sea, Eldigio Press. (still worth reading)