# Testing model representation of seasonal air-sea exchange of O2 and CO2

**URL:** <https://discourse.pangeo.io/t/testing-model-representation-of-seasonal-air-sea-exchange-of-o2-and-co2/232>\
**Category:** CMIP6 Project Proposals\
**Tags:** location-ncar\
**Created:** [October 4, 2019, 2:25am UTC](https://discourse.pangeo.io/t/testing-model-representation-of-seasonal-air-sea-exchange-of-o2-and-co2/232 "2019-10-04T02:25:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![yassir.eddebbar](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pangeo.io/yassir.eddebbar/32/64_2.png) [@yassir.eddebbar](https://discourse.pangeo.io/u/yassir.eddebbar)\
**Post date:** [October 4, 2019, 6:35pm UTC](https://discourse.pangeo.io/t/testing-model-representation-of-seasonal-air-sea-exchange-of-o2-and-co2/232/2 "2019-10-04T18:35:10Z")

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Hi Britt! Great proposal, and lots of technical and science synergies with the O2 and Carbon/productivity projects! It would be interesting e.g. to see if there are any relations between models specific representation of seasonal carbon fluxes and their longterm projections. @plerner has some interesting ideas on the seasonal cycle:

> [@Ocean Carbon Uptake and Productivity in the CMIP6 Ensemble](https://discourse.pangeo.io/t/ocean-carbon-uptake-and-productivity-in-the-cmip6-ensemble/193/8):
>
> What does the seasonal cycle of productivity and carbon uptake look like across the CMIP6 models. Can we identify ocean biogeochemical provinces with unique seasonal cycles (e.g., Henson et al., 2010;2013, Biogeosciences)? In each of these regions, what are the driving factors of the seasonal cycles in uptake and productivity? How and what differences are there in the predicted changes of the seasonal cycle (changes in amplitude + phase) of the CMIP6 models? Moreover, alluding to point (3) of Yassir, are changes in annual mean NPP systematic across the seasonal cycle, or are there seasonal variations in the sign and amplitude of the long-term changes?

Also interested in whether HIPPO & ATom can provide constrains on the net mean fluxes and their meridional profile (i.e. the equatorial APO bulge, etc.).

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