Rivers in MEDUSA

Rivers in eORCA1

Rivers in eORCA025

Developing the NPD runs and willing to have rivers for the SE-NEMO, we've tested the rivers in MEDUSA-NEMO4.2.2 within the NPD runs (GOSI10)
First, the code itself does what we want. just fixed 3 bugs :

• NPD reads ancillaries in directories (not in the running directory: "./"), and that needed a fix see
• forgot to add the river max depth in the namelist_medusa_ref
• the river nutrient check was in integer instead of REAL

first runs did not work because of something in the newly made river input files.

• tested 1 by 1 seems to come from the N river inputs. but all fields show high values in some specific river mouth, of which some in the Arctic look present very high values (here some example after 5month):
  those results are when using the files :
  • river42_total_ALK_flux_LS200km_SP10_OBfix_ORCA025.nc
  • river42_total_DIC_flux_LS200km_SP10_OBfix_ORCA025.nc
  • river42_tot_N_flux_LS200km_SP10_OBfix_ORCA025.nc
  • river42_tot_Si_flux_LS200km_SP10_OBfix_ORCA025.nc
• maybe the we can try with LS 400? here a diff: Running the LS 400 river nutrients did not solve the problem.
• Andrew added made some special treatment to the Ob fjord in the Russian Arctic. (diff with - without Ob special treatment) it didn't Solve the problem.
• I've them re-run the last rivers, spreading the nutrients down to 70m deep (max) instead of 10m earlier (see DIN between 2 and 102 mmol/m3 -- max go up to 155mmol/m3 in around the Ob). Still no Luck.
• Looking at the bathy, spreading the river nutrients down to 70m won't make a difference in the Arctic... As the sea-floor stands between 8 and 15m deep around there...
• Last hope LS400 with special Ob treatment.