Glossary

Symbol

Definition

Unit

D

Turbine rotor diameter (fixed parameter)

m

t

Time

s

x, y, z

Coordinates (east-west, north-south, vertical)

m

nt, nx, ny, nz

Number points in time and space dimensions

u

Wind vector component along East - West, positive going from West to East

m/s

v

Wind vector component along North - South, positive going from South to North

m/s

w

Wind vector component along vertical, positive going up

m/s

U

Magnitude of horizontal wind speed vector

m/s

WS

Magnitude of 3D wind speed vector

m/s

uLOS

Wind vector component along the line of sight of each lidar beam

m/s

WD

Direction of horizontal wind speed vector

deg

\({\Delta}\) WD

Veer computed at fixed (x,y) from two distinct z points

deg

TI

Turbulence intensity (from horizontal wind speed)

%

TKE

Turbulence kinetic energy (from 3-D wind speed)

m²/s²

L

Obukhov length

m

u*

Friction velocity

m/s

z0

Roughness length

m

zi

Atmospheric boundary layer height

m

T

Absolute temperature

K

Ts

Sonic temperature

K

Fs

Sensible heat flux

W/m²

CNR

Carrier-to-noise ratio

db

\(\overline{q}\)

Temporal average of variable q

unit of q

<q>

Ensemble average of variable q

unit of q

q’

Temporal perturbation of variable q, defined as - q

unit of q

qhub

Variable q evaluated at hub height

unit of q

\({\sigma}\)q

Standard deviation of variable q

unit of q

P

Generator power

W