[MITgcm-support] [EXTERNAL] How to force river runoff data in a regional domain

[Dimitris Menemenlis]

I would opt for option 1, the simplest and easiest to implement first.
Then examine your solution, compare with observations, and decide whether option 2 or 3 are needed.

> On Jul 28, 2021, at 3:09 AM, kunal madkaiker <kunal.madkaiker02 at gmail.com> wrote:
> 
> Dear MITgcm users,
> 
> I am doing regional simulations in the Northern Indian Ocean. Stratification in Bay of Bengal is controlled by salinity and freshwater flux since many rivers like Ganges, Brahmaputra empty into this basin.
> 
> I am not able to properly simulate my temp, salinity and currents into the Head bay region of BoB as I am unable to produce an equatorward flow in my domain. Freshwater increases in this region during month of JJAS due to melting of Himalayan glaciers.
> 
> I have gone through previously asked similar questions about river runoff and came to know the following possibilities:
> 
> 1. To feed at surface through data.exf
> 
> 2. Feeding a 3-D run-off input using addMassFile
> 
> 3. Through OBCS/ RBCS.
> 
> My domain is regional, with small dz and high spatial resolution.
> Please let me know which option is the best suited and reliable, since I not only want to improve my temp/ salinity but also to rectify the circulation in head bay region. I would be using Dai et al. (2009) river runoff data.
> All suggestions are welcome. Attaching figure of my model domain.
> 
> Thanks and Regards,
> Kunal
> <Both_coast_bathymetry.png>_______________________________________________
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