FV3

Model description

The GFDL Finite Volume Cubed-Sphere Dynamical Core (FV3) is a scalable and flexible dynamical core capable of both hydrostatic and non-hydrostatic atmospheric simulations. The key components of FV3 can be found from the official FV3 website.

Data structure

Vertical

The number of vertical levels is chosen as 79. The top of the model is at 3hPa. Both horizontal and vertical grid information can be found from the standard FV3 output files.

Horizontal

FV3 employs horizontal grid spacing of approximately 3.25 km (C3072), comprising 56,623,104 grid columns (3072 by 3072 by 6).

Data access

Model Level Variables (3D), Output Interval: PT03H

Variable

Description

Units

Level

Freq

u

zonal wind

m/s

model level

3h

v

meridional wind

m/s

model level

3h

w

vertical wind

m/s

model level

3h

temp

temperature

K

model level

3h

pres

pressure

Pa

model level

3h

qv

specific humidity

kg/kg

model level

3h

ql

cloud water mass mixing ratio

kg/kg

model level

3h

qi

cloud ice mass mixing ratio

kg/kg

model level

3h

qr

rain mass mixing ratio

kg/kg

model level

3h

qs

snow mass mixing ratio

kg/kg

model level

3h

qg

graupel mass mixing ratio

kg/kg

model level

3h

dp

pressure thickness

Pa

model level

3h

dz

height thickness

m

model level

3h

3D Variables Interpolated to 31 Pressure Levels. Output Interval: PT03H

Variable

Description

Units

Level

Freq

u_plev

zonal wind

m/s

Pressure level

3h

v_plev

meridional wind

m/s

Pressure level

3h

t_plev

temperature

K

Pressure level

3h

h_plev

height

m

Pressure level

3h

q_plev

specific humidity

kg/kg

Pressure level

3h

ql_plev

cloud water mass mixing ratio

kg/kg

Pressure level

3h

qi_plev

cloud ice mass mixing ratio

kg/kg

Pressure level

3h

qr_plev

rain mass mixing ratio

kg/kg

Pressure level

3h

qs_plev

snow mass mixing ratio

kg/kg

Pressure level

3h

qg_plev

graupel mass mixing ratio

kg/kg

Pressure level

3h

omg_plev

omega

Pa/s

Pressure level

3h

Selected Horizontal Slices (2D), Output Interval: PT15M

Variable

Description

Units

Level

Freq

u10m

zonal wind at 10m

m/s

10m

15min

v10m

meridional wind at 10m

m/s

10m

15min

t2m

temperature at 2m

K

2m

15min

q2m

specific humidity at 2m

kg/kg

2m

15min

ps

surface pressure

Pa

surface

15min

intqv

vertically integrated water vapor

kg/m^2

15min

intql

vertically integrated cloud water

kg/m^2

15min

intqi

vertically integrated cloud ice

kg/m^2

15min

intqr

vertically integrated rain

kg/m^2

15min

intqs

vertically integrated snow

kg/m^2

15min

intqg

vertically integrated graupel

kg/m^2

15min

cldc

vertically projected cloud cover

15min

lhflx

surface latent heat flux

W/m^2

surface

15min

shflx

surface sensible heat flux

W/m^2

surface

15min

ustrs

surface zonal momentum flux

N/s/m^2

surface

15min

vstrs

surface meridional momentum flux

N/s/m^2

surface

15min

pr

total precipitation (accumulated)

kg/m^2/s

surface

15min

ts

ground temperature

K

surface

15min

qs

surface specific humidity

kg/kg

surface

15min

fsdt

TOA downward shortwave (accumulated)

W/m^2

TOA

15min

fsut

TOA upward shortwave (accumulated)

W/m^2

TOA

15min

flut

TOA upward longwave (accumulated)

W/m^2

TOA

15min

fsds

surface downward shortwave (accumulated)

W/m^2

surface

15min

fsus

surface upward shortwave (accumulated)

W/m^2

surface

15min

flds

surface downward longwave (accumulated)

W/m^2

surface

15min

flus

surface upward longwave (accumulated)

W/m^2

surface

15min

cape

convective available potential energy

J/kg

15min

cin

convective inhibition

J/kg

15min

slp

sea level pressure

Pa

Zero height

15min

tm

300-500hPa mean temperature

K

300-500

15min

rh

relative humidity

500,850,700hPa

15min

vort

vorticity

1/s

850hPa

15min

Initialisation and Boundary conditions

Soil Initialisation

Initial land data (soil temperature, soil moisture, soil type, vegetation type, surface roughness, surface albedo properties, etc.) are from the GFS initial condition at 00Z August 1st, 2016.

Input Data

FV3 uses the IFS initial condition for atmosphere initialisation at August 1st, 2016.

Treatment of SST and Sea Ice

FV3 uses the provided IFS data (7 day means).