abby-baskind / seniorthesis

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Southern Ocean properties and carbon flux #5

Open gmacgilchrist opened 3 years ago

gmacgilchrist commented 3 years ago

In addition to looking at the Pacific Ocean, you'll also want to take a look at properties in the Southern Ocean. Same approach as for the Pacific section, but now visualizing properties from a circumpolar perspective centered on the Southern Ocean. The best python package for map projections is cartopy. That package is already available on Pangeo. You should be able to use a polar stereographic projection to get a nice visualization of the Southern Ocean. An example of this is here.

When looking at the Southern Ocean, you will want to look at DIC, Alkalinity, and potential pCO2, at different depths (maybe 10 meters, 100 meters, 200 meters): this is telling you the properties of the source waters for the Southern Ocean surface. You should also take a look at the air-sea flux of carbon. That is a variable called fgco2 and should be available for most of the same models that have the other carbonate chemistry variables.

A couple of useful references for the representation of the Southern Ocean carbon cycle in previous CMIP generations are:

Frölicher, TL, JL Sarmiento, DJ Paynter, JP Dunne, JP Krasting, & M Winton, ‘Dominance of the Southern Ocean in anthropogenic carbon and heat uptake in CMIP5 models’, Journal of Climate vol. 28, no. 2, 2015, pp. 862-886. Mongwe, NP, M Vichi, & PMS Monteiro, ‘The seasonal cycle of pCO2 and CO2 fluxes in the Southern Ocean: diagnosing anomalies in CMIP5 Earth system models’, Biogeosciences vol. 15, no. 9, 2018, pp. 2851.