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Variable Infiltration Capacity (VIC)
Macroscale Hydrologic Model

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Flux Output Files

The primary output file type for the VIC-NL model is the flux file, which contains information about moisture and energy fluxes for each time step. These output files are based on the model output files used for the PILPS-2C project. The number of variables in this file depends on the values of FULL_ENERGY and FROZEN_SOIL in the global parameter file; when either FULL_ENERGY or FROZEN_SOIL are true, the file will contain the same number of columns as found in the PILPS-2C files for comparison purposes. Flux files are always written, regardless of the mode of operation. Flux files begin with the prefix "fluxes_".

Each output file contains model output from one grid cell. The files use the naming convention "fluxes_xx.xx_yy.yy", where xx.xx is the latitude, and yy.yy is the longitude. The number of decimal places in the output filename is determined by GRID_DECIMAL in the global parameter file, while the latitude and longitude values come from the soil parameter file.


Flux File Format

Column

Variable Name

Units

Description

1

year

year

Year of current record

2

month

month

Month of current record

3

day

day

Day of current record

4

hour

hour

Hour of current record (if time step is sub-daily)

5

OUT_PREC

mm

Precipitation for current record

6

OUT_EVAP

mm

Evaporation for current record

7

OUT_RUNOFF

mm

Runoff for current record

8

OUT_BASEFLOW

mm

Baseflow for current record

9

OUT_WDEW

mm

Canopy interception of liquid water

10: Nlayer+9

OUT_SOIL_LIQ

mm

Moisture content of each soil layer

OUT_RAD_TEMP is only output when FULL_ENERGY or FROZEN_SOIL is TRUE in the global parameter file

Nlayer+10

OUT_RAD_TEMP

K

Radiative temperature of the surface

Nlayer+11

OUT_NET_SHORT

W/m2

Net shortwave radiation at the surface

Nlayer+12

OUT_R_NET

W/m2

Net radiation at the surface, includes long and shortwave radiation

OUT_LATENT is only output when FULL_ENERGY or FROZEN_SOIL is TRUE in the global parameter file

Nlayer+13

OUT_LATENT

W/m2

Latent heat from the surface

Nlayer+14

OUT_EVAP_CANOP

mm

Evaporation from canopy storage

Nlayer+15

OUT_TRANSP_VEG

mm

Transpiration from the vegetation

Nlayer+16

OUT_EVAP_BARE

mm

Evaporation from bare soil

Nlayer+17

OUT_SUB_CANOP

mm

Sublimation from canopy interception

Nlayer+18

OUT_SUB_SNOW

mm

Sublimation from ground snow pack

The following four variables are only output when FULL_ENERGY or FROZEN_SOIL is TRUE in the global parameter file

Nlayer+19

OUT_SENSIBLE

W/m2

Sensible heat flux from the surface

Nlayer+20

OUT_GRND_FLUX

W/m2

Ground heat flux plus heat storage in the top soil layer

Nlayer+21

OUT_DELTAH

W/m2 (ALMA_OUTPUT: J/m2)

Rate of change in heat storage

Nlayer+22

OUT_FUSION

W/m2

Net energy used to melt/freeze soil moisture


Nlayer+23

OUT_AERO_RESIST

s/m

Aerodynamic resistance

Nlayer+24

OUT_SURF_TEMP

C

Surface temperature

Nlayer+25

OUT_ALBEDO

fraction

Albedo of surface cover

Nlayer+26

OUT_REL_HUMID

fraction

Relative humidity

Nlayer+27

OUT_IN_LONG

W/m2

Incoming longwave at ground surface (under vegetation)

Nlayer+28

OUT_AIR_TEMP

C (ALMA_OUTPUT: K)

Air temperature

Nlayer+29

OUT_WIND

m/s

Near surface wind speed



VIC Administrator
Last modified: Mon Aug 31 10:44:37 PDT 2009