Tailwind-
A wind that assists the intended progress of an exposed, moving object, for example, rendering an airborne objects groundspeed greater than its airspeed; the opposite of a headwind.
Tangential acceleration-
The component of the acceleration directed along the velocity vector (streamline), with magnitude equal to the rate of change of speed of the parcel dV/dt, where V is the speed.
Telethermometer-
A temperature measuring system in which the thermally sensitive element is located at a distance from the indicating element.
Temperature-
The quantity measured by a thermometer.
Terrestrial radiation-
Longwave radiation originating by thermal emission from the earths surface and/or its atmosphere.
Tertiary circulations-
The generally small, localized atmospheric circulations.
Tethered balloon-
A positively buoyant unmanned balloon attached to a cable that is used to raise and lower the balloon.
Thermal wind-
The mean wind shear vector in geostrophic balance with the gradient of mean temperature of a layer bounded by two isobaric surfaces.
Thickness line-
A line drawn through all geographic points at which the thickness of a given atmospheric layer is the same; an isopleth of thickness.
Thunder-
The sound emitted by rapidly expanding gases along the channel of a lightning discharge.
Thunderstorm outflow-
The relatively cool pool of air that results when a thunderstorm downdraft reaches the earths surface and spreads horizontally as a density current.
Tilt-
In synoptic meteorology, the inclination to the vertical of a significant feature of the circulation (or pressure) pattern or of the field of temperature or moisture.
Trade winds-
The wind system, occupying most of the Tropics, that blows from the subtropical highs toward the equatorial trough; a major component of the general circulation of the atmosphere.
Trajectory-
A curve in space tracing the points successively occupied by a particle in motion.
Triple point-
1. Same as triple state. 2. A junction point within the tropics of three distinct air masses, considered to be an ideal point of origin for a tropical cyclone.
Tsunami-
Waves generated by seismic activity.
Turbidity-
The effect of (primarily) aerosols, through their total optical depth, in reducing the transmission of direct solar radiation to the surface below that through a purely molecular atmosphere.
Turbulence-
Irregular fluctuations occurring in fluid motions.
Turbulent diffusion-
Diffusion or dispersion due to the effects of turbulent motions.
Turbulent flux-
Transport of a quantity by quasi random eddies or swirls; the covariance between a velocity component and any variable.
