Terms O

Old Wives' summer

omega equation

ozonosphere

ozonesonde

ozone-depleting potential

ozone shield

ozone layer

ozone isopleth plot

ozone hole

ozone

Ozmidov scale

Oyashio

oxygen band

oxygen

oxidizing capacity of atmosphere

oxidation

oxidant

ox's eye

Owens dust recorder

overturn

overtrades

overshooting top

overseeding

overrunning

overlap

overland flow

overflow

overcast

output

outlook

outlet glacier

outgoing longwave radiation

outflow jet

outflow boundary

outflow

outer vortex

outer layer

outer atmosphere

ouari

OTD

OSV

ostria

OSSE

Osos wind

osmosis

osmometer

oscillator

orthogonal lines

orthogonal functions

orthogonal antennas

orthogonal

orsure

oroshi

orography

orographic wind flow

orographic vortex

orographic storm

orographic snow line

orographic rainfall

orographic precipitation

orographic occlusion

orographic lifting

orographic isobar

orographic fog

orographic cloud

orographic

oriented overgrowth

organized large eddies

organic peroxides

organic nitrates

organic acids

ordinate

ordinary ray

ordinary cell

orbital velocity

orbital motion

orbital elements

orbit number

orbit

ora

optimum interpolation

optimum flight

optimal yield

optimal perturbation

optically smooth

optically homogeneous

Optical Transient Detector

optical thickness

optical scattering probe

optical rain gauge

optical pathlength

optical path

optical particle probe

optical meteor

optical mass

optical imaging probe

optical hygrometer

optical depth

optical counter

optical air mass

opposition

opposing wind

operator

operative temperature

operational weather limits

operational numerical model

Operational Linescan System

open-cell cumulus

open system

open channel flow

open cells

opaque sky cover

opacus

opacity

onshore wind

one-way entrainment process

one-dimensional model

one-and-a-half order closure

on top

on and off instruments

omega sun

ombroscope

ombrometer

OLS

Olland cycle

old snow

oil slick

ohmic current

ogive

Ogasawara high

offshore wind

off-center PPI scope

off-airways

oersted

oe

odd-oxygen system

odd hydrogen

odd chlorine

octane

octa

oceanography

oceanicity

oceanic meteorology

ocean weather station

ocean waves

Ocean Topography Experiment

ocean station vessel

ocean station

ocean mixing

ocean current

ocean conveyor belt

ocean

occlusion

occluded front

occluded depression

occluded cyclone

obstruction to vision

obstacle flow signature

observing systems simulation experiment

observer

observational network

observational error

observational day

observation well

obscuring phenomenon

obscuration

obliquity of the ecliptic

oblique visual range

objective forecast

objective analysis

oberwind

ob

oasis effect

O'Brien cubic polynomial