We analyze the behavior of Stommel two-box model of Ocean Circulation (water flux driven by Temperature and Salinity difference) when the system is subject to external perturbations (forcings), e.g. a cold water flux due to Greenland ice sheet melt or a polar warming rate.
We compare the results obtained using Ensemble Data Assimilation (ETKF; see pag. 9 of the report) and without it.
The code to generate the figs sits at /dapper/mods/Stommel.
Check out the report (Italian language) here.
Stommel H., Thermohaline Convection with Two Stable Regimes of Flow. Tellus, 13(2):224–230 (1961).
Dijkstra H., Dynamical Oceanography, Springer Berlin, Heidelberg (2008). Link: https://doi.org/10.1007/978-3-540-76376-5
Geir Evensen, et al., Data Assimilation Fundamentals, Springer Cham (2022). Link: https://doi.org/10.1007/978-3-030-96709-3
Zhang, Jinlun, Warming of the arctic ice-ocean system is faster than the global average since the 1960s. Geophysical Research Letters, 2005. Link: https://doi.org/10.1029/2005GL024216