NICAM

Model description

NICAM is a non-hydrostatic icosahedral atmospheric model (Tomita and Satoh, 2004) with an explicit cloud microphysics scheme. A configuration used in the DYAMOND project is similar to that described by Kodama et al., 2015.

Data structure

Vertical

The number of vertical levels is 78, and the interval between each vertical level is increased from the ground to the model top. An attached ASCII file is the geometric height of vertical model levels used in NICAM.

Horizontal

The horizontal grid spacing in the experiments was set to 3.5 km (Grid Level; GL11), 7.0 km (GL10) and 14 km (GL09).

Data access

Output variables are given below. A more detailed listing in terms of namelist descriptions, including the names of the files which contain corresponding variables, can be found here.

Land output, Output Interval: PT03H

ll_tg

soil temperature

Average

ll_wg

soil moisture

Average

ll_snw

snow amount

Average

ll_lai

leaf area index

Average

ll_rof

total runoff

Average

ll_rofl

runoff from each land layer

Average

ll_rofs

runoff by saturation excess

Average

ll_rofi

runoff by infiltration excess

Average

ll_rofo

runoff by surface storage overflow

Average

ll_rofb

runoff from base

Average

ll_tg

soil temperature

Snapshot

ll_wg

soil moisture

Snapshot

ll_snw

snow amount

Snapshot

Ocean output, Output Interval: PT15M

ol_sst

sea surface temperature

Average

ol_ice

sea ice mass

Average

ol_snow

snow on sea ice

Average

ol_ist

sea ice skin temperature

Average

ol_icr

sea ice concentration

Average

ol_gflx_adj

Q-flux

Average

ISCCP output, Output Interval: PT03H

dfq_isccp2

ISCCP cloud fraction

Average

dfq_isccp2

ISCCP cloud fraction

Snapshot

3D snapshot data, Output Interval: PT03H

ms_dh

diabatic heating rate

Snapshot

ms_u

velocity u

Snapshot

ms_v

velocity v

Snapshot

ms_w

velocity w

Snapshot

ms_tem

temperature

Snapshot

ms_qv

specific humidity

Snapshot

ms_rh

relative humidity

Snapshot

ms_pres

pressure

Snapshot

ms_qc

specific cloud water content

Snapshot

ms_qr

specific rain water content

Snapshot

ms_qi

specific cloud ice content

Snapshot

ms_qs

specific snow content

Snapshot

ms_qg

specific graupel content

Snapshot

ms_lwhr

diabatic heating rate by LW

Snapshot

ms_swhr

diabatic heating rate by SW

Snapshot

ms_rh

relative humidity

Snapshot

2D average output, Output Interval: PT15M

sl_cld_frac

cloud fraction Average

sl_cldi

ice water path Average

sl_cldw

liquid water path Average

sl_evap

evaporation Average

sl_slp

mean sea level pressure

Average

sl_slp_ecmwf

mean sea level pressure formulated by ECMWF

Average

sl_q2m

specific humidity at 2m

Average

sl_t2m

temperature at 2m Average

sl_tem_atm

mass weighted atmospheric temperature

Average

sl_tem_sfc

skin temperature Average

sl_u10m

velocity u at 10m Average

sl_v10m

velocity v at 10m Average

sl_vap_atm

precipitable water Average

sl_tppn

precipitation Average

sl_lwd_toa

downward LW at TOA Average

sl_lwu_toa

upward LW at TOA Average

sl_lwu_toa_c

upward LW (clear sky) at TOA

Average

sl_swd_toa

downward SW at TOA Average

sl_swu_toa

upward SW at TOA Average

sl_swu_toa_c

upward SW (clear sky )at TOA

Average

sl_lwd_sfc

downward LW at the surface

Average

sl_lwu_sfc

upward LW at the surface

Average

sl_swd_sfc

downward SW at the surface

Average

sl_swu_sfc

upward SW at the surface

Average

sl_lwd_sfc_c

downward LW (clear sky) at the surface

Average

sl_lwu_sfc_c

upward LW (clear sky) at the surface

Average

sl_swd_sfc_c

downward SW (clear sky) at the surface

Average

sl_swu_sfc_c

upward SW (clear sky) at the surface

Average

sl_lh_sfc

latent heat flux Average

sl_sh_sfc

sensible heat flux Average

sl_tppn_energy

other energy flux due to precipitation

Average

sl_evap_energy

other energy flux due to evaporation

Average

sl_albedo

surface albedo (inc. scattering)

Average

sl_tauu

surface stress in the longitudinal direction

Average

sl_tauv

surface stress in the latidudinal direction

Average

2D snapshots, Output Interval: PT15M

sl_tppn

precipitation Snapshot

sl_cldi

ice water path Snapshot

sl_cldw

liquid water path Snapshot

sl_evap

evaporation Snapshot

sl_slp

mean sea level pressure

Snapshot

sl_slp_ecmwf

mean sea level pressure formulated by ECMWF

Snapshot

sl_q2m

specific humidity at 2m

Snapshot

sl_t2m

temperature at 2m Snapshot

sl_tem_sfc

skin temperature Snapshot

sl_u10m

velocity u at 10m Snapshot

sl_v10m

velocity v at 10m Snapshot

sl_vap_atm

precipitable water Snapshot

sl_lwu_toa

upward LW at TOA Snapshot

sl_lwu_toa_c

upward LW (clear sky) at TOA

Snapshot

sl_swd_toa

downward SW at TOA Snapshot

sl_swu_toa

upward SW at TOA Snapshot

sl_swu_toa_c

upward SW (clear sky )at TOA

Snapshot

sl_lwd_sfc

downward LW at the surface

Snapshot

sl_lwu_sfc

upward LW at the surface

Snapshot

sl_swd_sfc

downward SW at the surface

Snapshot

sl_swu_sfc

upward SW at the surface

Snapshot

sl_lwd_sfc_c

downward LW (clear sky) at the surface

Snapshot

sl_lwu_sfc_c

upward LW (clear sky) at the surface

Snapshot

sl_swd_sfc_c

downward SW (clear sky) at the surface

Snapshot

sl_swu_sfc_c

upward SW (clear sky) at the surface

Snapshot

sl_lh_sfc

latent heat flux Snapshot

sl_sh_sfc

sensible heat flux Snapshot

sl_taucl

optical depth of liquid water

Snapshot

sl_tauci

optical depth of ice water

Snapshot

sl_tauc

optical depth of cloud water

Snapshot

sl_taur

optical depth of rain water

Snapshot

sl_taui

optical depth of cloud ice

Snapshot

sl_taus

optical depth of snow

Snapshot

sl_taug

optical depth of graupel

Snapshot

sl_albedo

surface albedo (incl. scattering)

Snapshot

sl_albedo_sfc

surface albedo (direct, vis)

Snapshot

sl_albedo_sfc2

surface albedo (direct, nir)

Snapshot

sl_albedo_sfc3

surface albedo (direct, ir)

Snapshot

sl_albedo_sfc4

surface albedo (diffuse, vis)

Snapshot

sl_albedo_sfc5

surface albedo (diffuse, nir)

Snapshot

sl_albedo_sfc6

surface albedo (diffuse, ir)

Snapshot

Initialisation and Boundary conditions

Soil Initialisation

Initial soil data are derived from the equilibrium state in the climatological run by NICAM with a coarser resolution.

Input Data

Same as the description for ICON.

Treatment of SST and Sea Ice

Same as the description for ICON.

See also