Category: Define

Hydrologic Cycle Often called the water cycle, it is the vertical and horizontal transport of water in all its states between the earth, the atmosphere,

Hydrology The study of the waters of the earth, especially with relation to the effects of precipitation and evaporation upon the occurrence and character of

Hydrosphere Considered as the water portion of the earth’s surface. Part of the geosphere. Geosphere Considered the solid portions of the earth, including the hydrosphere

Hygrometer An instrument that measures the water vapor content of the atmosphere. Water Vapor (H2O) Water in gaseous form. It is one of the most

Inches of Mercury (Hg) The name comes from the use of mercurial barometers which equate the height of a column of mercury with air pressure.

Infrared The long wave, electromagnetic radiation of radiant heat emitted by all hot objects. On the electromagnetic spectrum, it can be found between microwave radiation

Instability The state of equilibrium in which a parcel of air when displaced has a tendency to move further away from its original position. It

International Date LineThe line of longitude located at 180 Degrees East or West where the date changes by a day. West of the line it

Intertropical Convergence Zone (ITCZ) An area where the Northern and Southern Hemispheric trade winds converge, usually located between 10 degrees North and South of the

Inversion A departure from the usual increase or decrease of an atmospheric property with altitude. It usually refers to an increase in temperature with increasing