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Toward Implementing BLING (Biogeochemistry with Light, Iron, Nutrients and Gases) in the MITgcm Brendan Carter, Ariane Verdy, Matt Mazloff, Bob Key, and.

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Presentation on theme: "Toward Implementing BLING (Biogeochemistry with Light, Iron, Nutrients and Gases) in the MITgcm Brendan Carter, Ariane Verdy, Matt Mazloff, Bob Key, and."— Presentation transcript:

1 Toward Implementing BLING (Biogeochemistry with Light, Iron, Nutrients and Gases) in the MITgcm Brendan Carter, Ariane Verdy, Matt Mazloff, Bob Key, and Jorge Sarmiento

2 WHY? DIC package TOPAZ Darwin NEMURO Full Ecosystem

3 WHY? DIC package

4 WHY? DIC package

5 WHY? BLING? DIC TOPAZ/Darwin

6 WHY? BLING? DIC TOPAZ/Darwin

7 LIFE DIC

8 LIFE DIC BLING LIFE

9 LIFE DIC BLING LIFE 0.1 ?

10 LIFE DIC BLING The rest LIFE 0.1 ? Implicit microbial loop.

11 LIFE DIC BLING The rest Small Phytoplankton Large Phytoplankton Implicit size structure.

12 Small v. Large Biomass BLING assumes that: 1.Growth and mortality are in steady state. 2.Large phytoplankton has less density dependence to mortality (^4/3) than small (^2). Biomass Growth Horray! Why hast thou forsaken us?

13 Small v. Large Biomass BLING assumes that: 1.Growth and mortality are in steady state. 2.Large phytoplankton has less density dependence to mortality (^4/3) than small (^2). Biomass Growth/mortality Horray! Why hast thou forsaken us? Small Large

14 Small v. Large Biomass BLING assumes that: 1.Growth and mortality are in steady state. 2.Large phytoplankton has less density dependence to mortality (^4/3) than small (^2). Biomass Growth/mortality Horray! Why hast thou forsaken us? Small Large

15 Small v. Large Biomass BLING assumes that: 1.Growth and mortality are in steady state. 2.Large phytoplankton has less density dependence to mortality (^4/3) than small (^2). Biomass Growth/mortality Small Large Horray! Why hast thou forsaken us?

16 Small v. Large Biomass BLING assumes that: 1.Growth and mortality are in steady state. 2.Large phytoplankton has less density dependence to mortality (^4/3) than small (^2). Biomass Growth/mortality Small Large Small phytoplankton do better when it is warm and when times are hard. …they also export less.

17 Iron and light interaction Experimental evidence suggests: When iron is abundant, more chloroplasts are made, and chloroplasts are more efficient.

18 Iron and light interaction Experimental evidence suggests: When iron is scarce, organisms can’t use light as effectively.

19 Iron and light interaction Shows up twice in the light limitation… In the chlorophyll to carbon ratio and a term representing photosynthetic efficiency Both effectively decrease light limitation with iron.

20 As promised…

21

22 LIFE DIC BLING The rest Small Phytoplankton Large Phytoplankton

23 LIFE DIC BLING The rest Small Phytoplankton Large Phytoplankton

24 Other changes Oxygen is required to remineralize POFe and POP Remineralization curve is not quite a Martin curve even with oxygen. Minor light-adaptation… the amount of light a plankton needs decreases slightly as the mixed layer consistently grows darker

25 Next steps Resolve: co-limitation vs. Leibig’s Law of the minimum. Resolve: mixed layer averaging for irradiance memory term. Compile/debug, test, optimize, and check- in.

26 Temp and prod. Is BLING right for your application? [Chl] Large and Small Fe- Light Light Weight DICBLING


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