Hello COSIMA 
There’s no COSIMA meeting this week 1130 
Other business:
Very first CM3 Dev-Eval meeting
When: Tuesday 11th November at 10:30 am.
How: zoom link
How to get updates? Follow this thread.
All is invited to the first CM3 dev-eval meeting (background), we welcome contributions from everyone, we have a shiny GitHub repo. If you’ve got anything that’s relevant, please feel free to share a Figure or agenda item in this “wiki” post on the forum. We’ve already got contributions from @ctychung, @ezhilsabareesh8, @ongqingyee, @kieranricardo, @Harun_Rashid!
CM3 uses the same 25km OM3 ocean configuration and so it’s development is very relevant to COSIMA oceanographers (e.g. check out how BIG our drake passage transport is!)
ACCESS-NRI Seminar
“Wide-swath satellite altimetry data improves modelled mesoscale and submesoscale dynamics in a western boundary current”
Colette Kerry (1), Shane Keating (1), Moninya Roughan (2), M. Azaneu (2), G. Brassington (3)
Presenting author’s e-mail: c.kerry@unsw.edu.au
1 School of Mathematics and Statistics, UNSW, Sydney, Australia
2 School of Biological, Earth and Environmental Sciences, UNSW, Sydney, Australia
3 Bureau of Meteorology, Sydney, Australia.
The ocean circulation varies across a range of temporal and spatial scales, and modelling and observing the relevant scales is key to effective ocean prediction and understanding the ocean’s role in global climate. By combining ocean models and observations through data assimilation, we can better understand and predict oceanic processes. Conventional satellite altimeter measurements of sea surface height have constrained mesoscale-eddy permitting models. However, accurate model estimates of submesoscale (<50km) flows remain a challenge due to rapidly evolving flow and lack of observations at suitable scales. The Surface Water and Ocean Topography (SWOT) mission provides the first-ever synchronous 2D maps of SSH at ~2km resolution, albeit at low temporal resolution (21-day repeat cycle). Here we use advanced data-assimilation in a submesoscale-permitting model of the East Australian Current and reveal the positive impact of SWOT observations on both mesoscale and submesoscale circulation estimates. We demonstrate a key distinction between the impact of assimilating fine-scale SWOT observations on model representation and prediction of ocean processes across scales. Assimilating SWOT data improves representation and prediction of the larger-scale mesoscale motions, and improves representation (but not prediction) of the fine-scale dynamics. Increased relative vorticity variance with SWOT assimilation is widespread in space and time (away from SWOT observations) and projected to depth. By improving how we represent and forecast ocean processes, we lay the foundation for better climate projections and more accurate ocean forecasts.
Thursday 6th November 10 am
Physical location: ACCESS-NRI, boardroom 5 Liversidge St, Acton ACT
Zoom location: Launch Meeting - Zoom
Cheers,
Ed
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