Ice
- frozen water; the solid form of
water substance
Ice
Age - a time of widespread glaciation
Ice
Crystal - any one of a number of crystalline forms of ice
which are visible to the naked eye
Ideal
Gas - a gas that obeys Boyle's law
and Charles's law and satisfies the equation
of state, has internal energy that depends
on temperature only, and has specific
heat that is independent of temperature
Indian
Summer - a period of abnormally warm or mild weather in late
autumn or early winter
Inflow
Notch - a distinct feature on
the radar characterized by an indentation in
the reflectivity pattern on the inflow
side of the storm. The indentation often is V-shaped, but this term should
not be confused with V-notch.
Infrared
Radiation - radiation which
is less energetic than visible radiation and more energetic than microwave
radiation; the radiation emitted by the earth's surface or atmosphere
Insolation
- incoming solar radiation;
sunshine
Instability
- the tendency for an object, if moved, to accelerate in the
direction of initial movement; in particular for meteorologists,
the tendency for air parcels to accelerate
upward after being lifted
Internal
Energy - a measure of the molecular activity of a substance
or the sum of the total energies of all molecules
in a specific mass. In an ideal gas, internal
energy is directly proportional to the temperature
of the substance.
Interpolate
- to estimate a value within an interval between two known
values
Intertropical
Convergence Zone (ITCZ) - the axis dividing the southeast trades
from the northeast trades, toward which the surface winds
tend to converge
Inversion
- in meteorology, a reversal of the normal
atmospheric temperature gradient with
height. An inversion is present in the lower part of a cap.
Irradiance
- the total incident radiant flux, in watts per square meter,
received on a unit area of a surface
Isobar
- a line connecting points of equal pressure
Isodrosotherm
- a line connecting points of equal
dewpoint temperature
Isohyet
- a line connecting points of equal precipitation
amounts
Isopleth
- a general term for a line connecting points of equal value of
some quantity. Isobars, isotherms,
etc. are all examples of isopleths.
Isotach
- a line connecting points of equal wind
speed
Isotherm
- a line connecting points of equal temperature
Isothermal
- having equal or constant temperature with respect to either
space or time
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