diff --git a/hamocc/mo_param_bgc.F90 b/hamocc/mo_param_bgc.F90
index b5cc90bb..adf62171 100644
--- a/hamocc/mo_param_bgc.F90
+++ b/hamocc/mo_param_bgc.F90
@@ -483,7 +483,7 @@ module mo_param_bgc
   !
   real, protected :: sedict      = 1.e-9          ! m2/s Molecular diffusion coefficient
   real, protected :: silsat      = 0.001          ! kmol/m3 Silicate saturation concentration is 1 mol/m3
-  real, protected :: disso_poc   = 0.01 / 86400.  ! 1/(kmol O2/m3 s) disso=3.e-5 was quite high - Degradation rate constant of POP
+  real, protected :: disso_poc   = 0.432 / 86400. ! 1/(kmol O2/m3 s)      Degradation rate constant of POP
   real, protected :: disso_sil   = 3.e-8          ! 1/(kmol Si(OH)4/m3 s) Dissolution rate constant of opal
   real, protected :: disso_caco3 = 1.e-7          ! 1/(kmol CO3--/m3 s) Dissolution rate constant of CaCO3
   real, protected :: sed_denit   = 0.01/86400.    ! 1/s Denitrification rate constant of POP