a

Radius of the Earth; Acceleration

b

Buoyancy

c

Phase Speed of a Wave

c_pd

Specific Heat of Dry Air at Constant Pressure

c_pv

Specific Heat of Water Vapor at Constant Pressure

c_vd

Specific Heat of Dry Air at Constant Volume

c_w

Specific Heat of Liquid Water

e

Internal Energy Per Unit Mass or Vapor Pressure

e_s

Saturation Vapor Pressure

f

Coriolis Parameter (=2W sinf)

g

Mangnitude of Gravity; Antenna Gain

g (*)

Gravity Vector

g^*

Effective Gravitational Acceleration

h

Specific Enthalpy; Effective Pulse Length

i

Square Root of Negative One

i (*)

Unit Vector Along the x-axis

j (*)

Unit Vector Along the y-axis

k (*)

Unit Vector Along the z-axis

k

Zonal Wave Number

l

Mixing Length; Meridional Wave Number

m

Mass; Vertical Wave Number; Planetary Wave Number

m_v

Molecular Weight of Water

n

Distance in Direction Normal to a Parcel Trajectory; Meridional Index for Equatorial Waves; Refractive Index

n (*)

Unit Vector Normal to a Surface

p

Pressure

p_o; p_s

Standard Constant Pressure; Surface Pressure in s Coordinates

p_r

Received Power

p_t

Transmitted Power

q

Specific Humidity; Quasi-geostrophic Potential Vorticity; Water Vapor Mixing Ratio

q_s; w_s

Saturation Mixing Ratio

r

Radial Distance in Spherical Coordinates; Range to Target

r (*)

A Position Vector

s

Generalized Vertical Coordinates; Distance Along a Parcel Trajectory; Specific Entropy; Dry Static Energy

t

Time

t (*)

Unit Vector Parallel to a Parcel Trajectory

u_*

Friction Velocity

u

x-component of Velocity (Eastward); Specific Internal Energy

v

y-component of Velocity (Northward); Specific Volume (may also be written as a)

w

z-component of Velocity (Upward)

w_*

Vertical Motion in Log-Pressure System

x

Eastward Distance

y

Northward Distance

z

Upward Distance (Usually From Surface Of The Earth)

z_*

Vertical Coordinate in Log-Pressure System

A

Area

B

Magnetic Field; Convective Available Potential Energy (CAPE)

C

Circulation

C_d

Surface Drag Coefficient

D_E

Depth of Ekman Layer

D_i

Drop Diameter

E

Electric Field; Evaporation Rate

F

Irradiance

F (*)

Friction

G

Universal Gravitational Constant; Zonal Force

H

Scale Height; Enthalpy

J

Heating Rate Per Unit Volume

K

Total Horizontal Wave Number; Kinetic Energy

K_m

Eddy Viscosity Coefficient

L

Radiance; Angular Momentum

M

Total Mass; Mass in Convergence in Ekman Layer; Absolute Zonal Momentum; Angular Momentum

M_v

Molecular Weight of Water

N

Buoyancy Frequency; Number Density; Refractivity

P

Available Potential Energy; Precipitation Rate; Ertel Potential Vorticity

Q (*)

Q Vector

Q

Heating Rate

R

Gas Constant for Dry Air; Distance From the Axis of Rotation of the Earth to a Point on the Surface of the Earth; Diabatic Energy Generation Rate

R_max

Maximum Unambiguous Range

R (*)

Vector in the Equatorial Plane Directed from the Axis of Rotation

R*

Universal Gas Constant

S

Entropy

S_o

Solar Irradiance

S_p

-T ¶ ln T / ¶ p, Stability Parameter in Pressure Coordinates

T

Absolute Temperature

U

Horizontal Velocity Scale; Internal Energy

U (*)

Three Dimensional Velocity Vector

V

Speed in Natural Coordinates; Volume

V_r

Radial Velocity

V_max

Maximum Unambiguous Velocity

V (*)

Horizontal Velocity Vector

W

Working Rate; Vertical Motion Scale

X

Zonal Turbulent Drag Force

Z

Geopotential Height; Radar Reflectivity

a

Specific Volume (may also be written as v); Albedo

b

Scattering Coefficient; df/dy, Variation of the Coriolis Parameter with Latitude; Angular Direction of the Wind

e

Efficiency; Rate of Frictional Dissipation; Thermal Expansion Coefficient of Water; Emissivity; Ratio of Molecular Weights

g

C_p/C_v, Ratio of Specific Heats; ¶T/ ¶z, Environmental Lapse Rate

h

Vertical Component of Absolute Vorticity; Weight Function for Heating Profile

j

Latitude; Vertical Beam Width

k

Absorption Coefficient; R/C_p, Ratio of Gas Constant to Specific Heat at Constant Pressure; Rayleigh Friction Coefficient

l

Wavelength; Longitude, Positive Eastward

m

Dynamic Viscosity

n

Frequency; Angular Frequency; Kinematic Viscosity

q

Potential Temperature; Angle; Horizontal Beam Width

q'

Potential Temperature Deviation (may also be written as Q)

q_e

Equivalent Potential Temperature

r

Density

s

-a ¶q/¶p, Stability Parameter In Isobaric Coordinates; -p/p_s, Vertical Coordinate System in s System; Density in Isentropic Coordinates; Standard Deviation; Backscattering Cross-section; Spectrum Width; Surface Tension

s_a

Absorption Cross-Section

s_s

Scattering Cross-Section

t

Optical Depth; Optical Thickness; Optical Path Length; Pulse Duration

t_d

Diffusive Time Scale

t_E

Eddy Stress

t_o

Surface Stress

w

Vertical Velocity (dp/dt) in Isobaric Coordinates; Angular Frequency

w (*)

Vorticity Vector

y

Horizontal Streamfunction

z

Vertical Component of Relative Vorticity

z_a

Vertical Component of Absolute Vorticity

C

Geopotential Tendency; Meridional Streamfunction

C_i

Ozone Mixing Ratio

G

-dT/dz, Lapse Rate of Temperature

G_d

g/C_p Dry Adiabatic Lapse Rate

G_s

Moist Adiabatic Lapse Rate

F

Geopotential

P

Exner Function

Q

Potential Temperature Deviation (may also be written as q')

W

Solid Angle; Angular Speed of Rotation of the Earth; Angular Speed of Rotation

W_rot (*)

Angular Velocity of the Earth