Mariene Wetenschappen 3, Universiteit Utrecht (2020)

Een samenvatting van de colleges van Mariene Wetenschappen 3, Universiteit Utrecht (2020) gegeven door Appy Sluijs en collega's.
Bevat afbeeldingen uit de hoorcolleges wat het aantal pagina's laat toenemen.

Preview samenvatting (3 van de 105 pagina's)

Mariene Wetenschappen 3
Week 1 Modern Ocean Change: A Systems Approach Here Modern Pertubation of the carbon cycle
1 Gt of CO2= 1/3.66 Gt of C Carbon sources:
 Fossil fuels and industry: 88%
 Deforestation: 12%

Carbon sinks:
 Atmosphere: 47%
 Forests (land): 30%
 Oceans: 23%

Carbon in the Ocean
Pre-industrial pCO2~ 280 ppmv
2020 pCO2~ 413 ppmv
~ 1/3 of anthroprogenic C in ocean)
(ppmv=ppm by volume) Carbonation: increase in DIC by CO2 dissolving in the ocean en dan krijg je
deze reactie

Acidification: increase of hyrodrogen ions
Increase in carbonation, results in increase of acidification
Slide 30: largest uncertainty how much CO2 we are going to emit, graph a
gedeelte tussen rood en blauw is de uncertainity
Slide 32: surface veel primaire productie
Onder bepaalde zone, alleen respiratie nog dus
CO2 accumuleert Slide 33:
Solubility pump: changes in solubility due to temperature decrease with
increasing depth; responsible for 1/3 of the gradient
Biological pump: responsible for 2/3 of the gradient
 Organic carbon pump: fixation of CO2 by photosynthesis, net flux of
CO2 from atmosphere to ocean
 Carbonate counter pump: calcification takes place which produces CO2
resulting in export of CO2 from ocean to atmosphere
 transport of CO2 between atmosphere and ocean surface layer happens
through Henry’s law
Henry’s law: a gas law that states that the amount of dissolved gas in a liquid is
proportional to its partial pressure above the liquid, meaning that a higher
concentration in one medium results in transport of the gas to the other medium
The Marine Organic Matter Cycle
GPP: gross primary production, total rate of carbon fixation/oxygen release by
phytoplankton
NPP: Net primary production, as GPP is partly used for respiration (Ra) by
phytoplankton
Ra: respiration of phytoplankton
Rh: consumption of organic matter by heterotrophs for growth and respiration
NEP: the remaining organic matter which is available for export
-NPP most relevant for euphotic zone food web functioning
-NEP most relevant for biological pump and benthic food webs

Slide 38: ezelsbrug: stel de getallen voor als geld (getallen van linker afbl 50 t
0.2)