9:45 AM - 10:00 AM
[AOS10-04] Atlantic Multidecadal Variability in CESM1.0
Keywords:Multidecadal climate variability, Climate model simulations, Atlantic Multidecadal Variability
This configuration of IE-CESM couples a 10-member atmospheric model ensemble mean to the ocean model, where each atmospheric model ensemble member is coupled to its own land surface model and its own sea ice model. The atmosphere, ocean, land, and sea ice components of IE-CESM, as well as the ocean initial conditions are identical to those in the CESM1.0 simulation. This coupling strategy eliminates the systematic biases between the climatologies of the CESM1.0 and IE-CESM simulations, while greatly reducing the forcing of the ocean by atmospheric noise in IE-CESM as compared to that in CESM1.0.
The analysis of the results from the simulations suggests that both forcing by atmospheric heat flux noise and ocean heat transports unrelated to the noise forcing make substantial contributions to the simulated AMV in CESM1.0. However, there are outstanding issues that remain unresolved.