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WRF ARW User's Guide - MMM - UCAR

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MODEL<br />

XLONG_V:units = "degree_east" ;<br />

float ALBEDO(Time, south_north, west_east) ;<br />

ALBEDO:description = "ALBEDO" ;<br />

ALBEDO:units = "-" ;<br />

float ALBBCK(Time, south_north, west_east) ;<br />

ALBBCK:description = "BACKGROUND ALBEDO" ;<br />

ALBBCK:units = "" ;<br />

float EMISS(Time, south_north, west_east) ;<br />

EMISS:description = "SURFACE EMISSIVITY" ;<br />

EMISS:units = "" ;<br />

float TMN(Time, south_north, west_east) ;<br />

TMN:description = "SOIL TEMPERATURE AT LOWER BOUNDARY" ;<br />

TMN:units = "K" ;<br />

float XLAND(Time, south_north, west_east) ;<br />

XLAND:description = "LAND MASK (1 FOR LAND, 2 FOR WATER)" ;<br />

XLAND:units = "" ;<br />

float UST(Time, south_north, west_east) ;<br />

UST:description = "U* IN SIMILARITY THEORY" ;<br />

UST:units = "m s-1" ;<br />

float PBLH(Time, south_north, west_east) ;<br />

PBLH:description = "PBL HEIGHT" ;<br />

PBLH:units = "m" ;<br />

float HFX(Time, south_north, west_east) ;<br />

HFX:description = "UPWARD HEAT FLUX AT THE SURFACE" ;<br />

HFX:units = "W m-2" ;<br />

float QFX(Time, south_north, west_east) ;<br />

QFX:description = "UPWARD MOISTURE FLUX AT THE SURFACE" ;<br />

QFX:units = "kg m-2 s-1" ;<br />

float LH(Time, south_north, west_east) ;<br />

LH:description = "LATENT HEAT FLUX AT THE SURFACE" ;<br />

LH:units = "W m-2" ;<br />

float SNOWC(Time, south_north, west_east) ;<br />

SNOWC:description = "FLAG INDICATING SNOW COVERAGE (1 FOR SNOW COVER)" ;<br />

SNOWC:units = "" ;<br />

Special <strong>WRF</strong> Output Variables<br />

<strong>WRF</strong> model outputs the state variables defined in the Registry file, and these state<br />

variables are used in the model's prognostic equations. Some of these variables are<br />

perturbation fields. Therefore some definition for reconstructing meteorological variables<br />

is necessary. In particular, the definitions for the following variables are:<br />

total geopotential PH + PHB<br />

total geopotential height in m ( PH + PHB ) / 9.81<br />

total potential temperature in_ K T + 300<br />

total pressure in mb ( P + PB ) * 0.01<br />

wind compoments, grid relative U, V<br />

surface pressure in Pa psfc<br />

surface winds, grid relative U10, V10 (valid at mass points)<br />

surface temperature and mixing ratio T2, Q2<br />

The definition for map projection options:<br />

<strong>WRF</strong>-<strong>ARW</strong> V3: User’s <strong>Guide</strong> 5-58

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