wiki:DevelopmentActivities/enhanced_weathering

Enhanced weathering

Enhanced weathering module based on Strefler et al. (2018) which simulates the phosphorus release and CO2 consumption by weathering of basalt and forsterite mineral grains. Grains are characterized by grain size diameter and mass applied.

Therefore the following additional forcing is needed: amount (g/m2/yr) and diameter (106 m) of grains of basalt and forsterite). It can be either prescribed via run.def or via spatial explicit maps (See here for details https://forge.ipsl.jussieu.fr/orchidee/wiki/DevelopmentActivities/inputRoutine).

To activate (in PARAM/run.def)

ENHANCED_WEAT=y

To read in from maps (in PARAM/run.def):

NINPUT_UPDATE=1
IMPOSE_NMAP=y
IMPOSE_NINPUT=y

# where can the input data be found:
EW_BASALT_MASS_FILE=NMIP_agricultural_input.nc
EW_BASALT_SIZE_FILE=NMIP_agricultural_input.nc
EW_FORSTERITE_MASS_FILE=NMIP_agricultural_input.nc
EW_FORSTERITE_SIZE_FILE=NMIP_agricultural_input.nc

To read in from run.def (in PARAM/run.def):

NINPUT_UPDATE=1
IMPOSE_NMAP=n
IMPOSE_NINPUT=y

# Mass in g m-2 yr-1
EW_BASALT_MASS=15000.
EW_FORSTERITE_MASS=0.
# Grain diameter in 10^6 m
EW_BASALT_SIZE=20
EW_FORSTERITE_SIZE=20

Remark: The minerals are applied at once in the last time step of the year.

Last modified 6 years ago Last modified on 2018-06-05T17:11:31+02:00