[MITgcm-support] separating sea ice and atmos FW fluxes
Martin.Losch at awi.de
Tue Feb 17 08:56:44 EST 2015
I think these are the relevant diagnostics for DV/DT (without the advection which, presumably, you don’t want):
diagName = 'SIdHbOCN'
diagTitle = 'HEFF rate of change by ocean ice flux'
diagName = 'SIdSbATC'
diagTitle = 'HSNOW rate of change by atm flux over sea ice'
diagName = 'SIdSbOCN'
diagTitle = 'HSNOW rate of change by ocean ice flux'
diagName = 'SIdHbATC'
diagTitle = 'HEFF rate of change by atm flux over sea ice'
diagName = 'SIdHbATO'
diagTitle = 'HEFF rate of change by open ocn atm flux’
all in meters of sea ice per second. Could it be easier than that? (;
> On 17 Feb 2015, at 04:15, Holland, Paul R. <pahol at bas.ac.uk> wrote:
> Dear listees
> I'm sorry but I'm getting confused with sea ice freshwater diagnostics... again! I want to work out how much of the freshwater going into the ocean comes from sea ice, P-E, runoff, and ice shelves. It's the first two I have problems with.
> From previous threads I know that SIempmr is the total FW flux into the ocean, and SIatmFW is the total FW leaving the atmosphere. However, I want the net FW flux into the ocean from ice melt, and the net P-E into the ocean through leads in the ice. I can't work out how to derive that from these two diagnostics.
> The way I see it, there are three relevant fluxes:
> AI: atmophere->ice FW flux
> AO: atmosphere->ocean FW flux
> IO: ice->ocean FW flux
> SIempmr=IO+AO, while SIatmFW=AI+AO. I want IO and AO, so I am trying to solve a system of 2 equations with 3 unknowns! Can someone tell me where I am going wrong, or provide me with one or more diagnostics that will unlock the system? If I had the change in total ice mass DV/Dt=AI-IO that would do it, but I don't fancy trying to calculate the material derivative.
> Hopefully I'm just confused.
> Dr. Paul Holland
> British Antarctic Survey
> p.holland at bas.ac.uk
> +44 (0) 1223 221444
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