TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
WEATHER MODIFICATION [10 records]
Record 1 - internal organization data 2024-11-19
Record 1, English
Record 1, Subject field(s)
- Atmospheric, Climatic and Meteorological Phenomena
Record 1, Main entry term, English
- cloud seeding
1, record 1, English, cloud%20seeding
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A weather modification technique in which clouds are treated with an active substance or agent and commonly undertaken with the following goals in mind[, ] to stimulate precipitation processes[, ] to dissipate clouds or fog [or] to suppress hail. 2, record 1, English, - cloud%20seeding
Record 1, French
Record 1, Domaine(s)
- Phénomènes météorologiques, climatiques et atmosphériques
Record 1, Main entry term, French
- ensemencement des nuages
1, record 1, French, ensemencement%20des%20nuages
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Opération de modification du temps où l'on traite les nuages avec une substance ou un agent actifs en vue d'obtenir en général l'un des résultats suivants[,] stimuler les processus de précipitation[,] dissiper les nuages ou le brouillard [ou] prévenir la grêle. 2, record 1, French, - ensemencement%20des%20nuages
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Fenómenos meteorológicos, climáticos y atmosféricos
Record 1, Main entry term, Spanish
- siembra de las nubes
1, record 1, Spanish, siembra%20de%20las%20nubes
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 DEF
Técnica de modificación del tiempo en la que se tratan las nubes con una sustancia o un agente activos para obtener en general uno de los resultados siguientes[,] estimular los procesos de precipitación[,] disipar las nubes o la niebla [o] suprimir el granizo. 1, record 1, Spanish, - siembra%20de%20las%20nubes
Record 2 - internal organization data 2022-10-20
Record 2, English
Record 2, Subject field(s)
- Provincial Government Bodies and Committees (Canadian)
- Atmospheric, Climatic and Meteorological Phenomena
Record 2, Main entry term, English
- Interim Weather Modification Board
1, record 2, English, Interim%20Weather%20Modification%20Board
correct, Alberta
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
The Alberta Government established the Interim Weather Modification Board and the Alberta Hail Project in 1973 to hasten the development of hail suppression technology and test it on a wide scale in Alberta. 1, record 2, English, - Interim%20Weather%20Modification%20Board
Record 2, French
Record 2, Domaine(s)
- Organismes et comités de gouvernements provinciaux canadiens
- Phénomènes météorologiques, climatiques et atmosphériques
Record 2, Main entry term, French
- Interim Weather Modification Board
1, record 2, French, Interim%20Weather%20Modification%20Board
correct, Alberta
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2004-11-26
Record 3, English
Record 3, Subject field(s)
- Climatology
Record 3, Main entry term, English
- weather modification
1, record 3, English, weather%20modification
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- weather control 2, record 3, English, weather%20control
see observation
- artificial control of weather 3, record 3, English, artificial%20control%20of%20weather
see observation
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
Intentional or unintentional change in the weather caused by human activities. 4, record 3, English, - weather%20modification
Record number: 3, Textual support number: 1 OBS
weather modification(weather control). The term usually refers to cloud seeding activities, but can also include constructing windbreaks, dissipating fog by the forceful addition of heat or water spray, or preventing frost formation on crops by cloud spray, heating, or mixing processes. Inadvertent weather modification refers to accidental weather effects resulting from the release of greenhouse gases, aerosols, and dust, or changes in albedo or surface properties of the earth associated with urban, industrial, or agricultural activity. 5, record 3, English, - weather%20modification
Record number: 3, Textual support number: 2 OBS
Schemes for modifying the long-range climate of a region are often referred to as climate control. 6, record 3, English, - weather%20modification
Record number: 3, Textual support number: 3 OBS
In some sources, "weather control" is considered as a synonym of "weather modification" whereas in the International Glossary of Meteorology(OMMV) it has a separate entry and it is defined as a "Weather modification carried out towards a deliberate end. " 7, record 3, English, - weather%20modification
Record 3, Key term(s)
- weather artificial control
- modification of the weather
- control of the weather
Record 3, French
Record 3, Domaine(s)
- Climatologie
Record 3, Main entry term, French
- modification du temps
1, record 3, French, modification%20du%20temps
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- modification des conditions météorologiques 2, record 3, French, modification%20des%20conditions%20m%C3%A9t%C3%A9orologiques
correct, feminine noun
- action sur le temps 3, record 3, French, action%20sur%20le%20temps
correct, feminine noun
- modification artificielle du temps 4, record 3, French, modification%20artificielle%20du%20temps
see observation, feminine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Changement, intentionnel ou non, du temps imputable à l'activité humaine. 5, record 3, French, - modification%20du%20temps
Record number: 3, Textual support number: 1 CONT
La modification des conditions météorologiques observée ces jours-là ne permet pas de faire toute la lumière sur cette alerte à la pollution atmosphérique ni sur l'efficacité réelle des mesures de circulation adoptées. 6, record 3, French, - modification%20du%20temps
Record number: 3, Textual support number: 1 OBS
Le Glossaire international de météorologie définit le terme «modification artificielle du temps» comme étant une «Modification du temps faite dans un but déterminé.» 7, record 3, French, - modification%20du%20temps
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Climatología
Record 3, Main entry term, Spanish
- modificación del tiempo
1, record 3, Spanish, modificaci%C3%B3n%20del%20tiempo
correct, feminine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
- modificación de las condiciones meteorológicas 1, record 3, Spanish, modificaci%C3%B3n%20de%20las%20condiciones%20meteorol%C3%B3gicas
feminine noun
- modificación artificial del tiempo 2, record 3, Spanish, modificaci%C3%B3n%20artificial%20del%20tiempo
feminine noun
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Modificación del tiempo causada por actividades del hombre, sean éstas intencionales o no. 3, record 3, Spanish, - modificaci%C3%B3n%20del%20tiempo
Record 4 - internal organization data 2004-11-23
Record 4, English
Record 4, Subject field(s)
- Climatology
Record 4, Main entry term, English
- weather control
1, record 4, English, weather%20control
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
Weather modification carried out towards a deliberate end. 1, record 4, English, - weather%20control
Record 4, Key term(s)
- control of the weather
- artificial control of weather
- weather artificial control
Record 4, French
Record 4, Domaine(s)
- Climatologie
Record 4, Main entry term, French
- modification artificielle du temps
1, record 4, French, modification%20artificielle%20du%20temps
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Modification du temps faite dans un but déterminé. 1, record 4, French, - modification%20artificielle%20du%20temps
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Climatología
Record 4, Main entry term, Spanish
- control del tiempo
1, record 4, Spanish, control%20del%20tiempo
masculine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
Record 4, Textual support, Spanish
Record number: 4, Textual support number: 1 DEF
Modificación artificial del tiempo producida para alcanzar un objetivo deseado. 1, record 4, Spanish, - control%20del%20tiempo
Record 5 - internal organization data 2004-10-12
Record 5, English
Record 5, Subject field(s)
- Weather Stations and Meteorological Instruments and Equipment
Record 5, Main entry term, English
- trailing flare
1, record 5, English, trailing%20flare
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
A pyrotechnic device used in weather modification or cloud seeding to produce a controlled release of seeding agent from an aircraft. 2, record 5, English, - trailing%20flare
Record number: 5, Textual support number: 1 CONT
pyrotechnic flare: Equipment for delivering silver iodide particles from an aircraft. There are two types: the trailing flare and the dropping flare. 3, record 5, English, - trailing%20flare
Record 5, French
Record 5, Domaine(s)
- Stations, instruments et équipements météorologiques
Record 5, Main entry term, French
- pièce pyrotechnique de largage
1, record 5, French, pi%C3%A8ce%20pyrotechnique%20de%20largage
correct, feminine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
- fusée pyrotechnique attachée à l'aéronef 2, record 5, French, fus%C3%A9e%20pyrotechnique%20attach%C3%A9e%20%C3%A0%20l%27a%C3%A9ronef
proposal, feminine noun
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Pièce pyrotechnique aéroportée à extrémité combustible qui permet un contrôle amélioré et graduel de l'ensemencement des nuages. 3, record 5, French, - pi%C3%A8ce%20pyrotechnique%20de%20largage
Record number: 5, Textual support number: 1 OBS
[La] fusée pyrotechnique [...] sert à la dispersion d'iodure d'argent à partir d'un aéronef. Il y en a deux types : l'une est attachée à l'aéronef, l'autre tombe en chute libre. 3, record 5, French, - pi%C3%A8ce%20pyrotechnique%20de%20largage
Record 5, Spanish
Record 5, Campo(s) temático(s)
- Estaciones, instrumentos y equipos meteorológicos
Record 5, Main entry term, Spanish
- cohete de arrastre
1, record 5, Spanish, cohete%20de%20arrastre
masculine noun
Record 5, Abbreviations, Spanish
Record 5, Synonyms, Spanish
- cohete fijado a una aeronave 1, record 5, Spanish, cohete%20fijado%20a%20una%20aeronave
masculine noun
Record 5, Textual support, Spanish
Record number: 5, Textual support number: 1 OBS
Dispositivo de extremo combustible, análogo a un cohete de aviso, utilizado por una aeronave para alcanzar una siembra más controlada y gradual de las nubes. 1, record 5, Spanish, - cohete%20de%20arrastre
Record number: 5, Textual support number: 2 OBS
cohete pirotécnico: Equipo de dispersión de partículas de yoduro de plata desde una aeronave. Existen dos tipos: cohete fijado a una aeronave y cohete de caída libre. 1, record 5, Spanish, - cohete%20de%20arrastre
Record 6 - internal organization data 2001-09-19
Record 6, English
Record 6, Subject field(s)
- Titles of International Programs
- Environment
Record 6, Main entry term, English
- Atmospheric Research and Environment Programme
1, record 6, English, Atmospheric%20Research%20and%20Environment%20Programme
correct, international
Record 6, Abbreviations, English
- AREP 1, record 6, English, AREP
correct, international
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 OBS
... of the World Meteorological Organization. The Atmospheric Research and Environment Programme promotes atmospheric research and development and technology transfer between Members. It includes the Global Atmosphere Watch, which integrates monitoring and research activities carried out under the Global Ozone Observing System(GO3OS) and the Background Air Pollution Monitoring Network(BAPMoN) and serves as a system to detect changes in the composition of the atmosphere, an important prerequisite to understanding human impact on the atmosphere and addressing important aspects of sustainable development. The Programme also includes weather prediction research; a Tropical Meteorology Research Programme relating to studies of monsoons, tropical cyclones, rain-producing tropical weather systems and droughts; and a programme on the physics and chemistry of clouds and weather modification. 2, record 6, English, - Atmospheric%20Research%20and%20Environment%20Programme
Record 6, French
Record 6, Domaine(s)
- Titres de programmes internationaux
- Environnement
Record 6, Main entry term, French
- Programme consacré à la recherche atmosphérique et à l'environnement
1, record 6, French, Programme%20consacr%C3%A9%20%C3%A0%20la%20recherche%20atmosph%C3%A9rique%20et%20%C3%A0%20l%27environnement
correct, masculine noun, international
Record 6, Abbreviations, French
- PRAE 2, record 6, French, PRAE
correct, masculine noun, international
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 OBS
[...] de l'Organisation météorologique mondiale. Le PRAE vise à stimuler la recherche atmosphérique, de même que l'élaboration de techniques et leur échange entre les Membres. Un de ses volets est la Veille de l'atmosphère globale, qui regroupe toutes les activités de surveillance et de recherche menées dans le cadre du Système mondial d'observation de l'ozone (SMOO3) et du Réseau de surveillance de la pollution atmosphérique de fond (PABMoN) et dont l'objectif essentiel est de détecter les modifications de la composition de l'atmosphère, ce qui est indispensable pour bien comprendre l'influence de l'homme sur l'atmosphère et pour faciliter la pratique d'un développement durable. Il comprend aussi des programmes de recherche sur la prévision météorologique, un programme de recherche en météorologie tropicale - englobant l'étude de la mousson, des cyclones tropicaux, des systèms météorologiques tropicaux pluvigènes et des sécheresses - et un programme de recherche sur la physique et la chimie des nuages et sur la modification artificielle du temps. 3, record 6, French, - Programme%20consacr%C3%A9%20%C3%A0%20la%20recherche%20atmosph%C3%A9rique%20et%20%C3%A0%20l%27environnement
Record 6, Spanish
Record 6, Campo(s) temático(s)
- Títulos de programas internacionales
- Medio ambiente
Record 6, Main entry term, Spanish
- Programa de Investigación de la Atmósfera y el Medio Ambiente
1, record 6, Spanish, Programa%20de%20Investigaci%C3%B3n%20de%20la%20Atm%C3%B3sfera%20y%20el%20Medio%20Ambiente
correct, masculine noun, international
Record 6, Abbreviations, Spanish
- PIAMA 2, record 6, Spanish, PIAMA
correct, masculine noun, international
Record 6, Synonyms, Spanish
Record 6, Textual support, Spanish
Record number: 6, Textual support number: 1 OBS
Organización Meteorológica Mundial. 2, record 6, Spanish, - Programa%20de%20Investigaci%C3%B3n%20de%20la%20Atm%C3%B3sfera%20y%20el%20Medio%20Ambiente
Record 7 - internal organization data 2001-05-23
Record 7, English
Record 7, Subject field(s)
- Titles of International Programs
- Climatology
- Meteorological Forecasting, Data Measurement and Analysis
Record 7, Main entry term, English
- Physics and Chemistry of Clouds and Weather Modification Research Programme
1, record 7, English, Physics%20and%20Chemistry%20of%20Clouds%20and%20Weather%20Modification%20Research%20Programme
correct, international
Record 7, Abbreviations, English
- PCCWMR 1, record 7, English, PCCWMR
correct, international
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 OBS
... of the World Meteorological Organization. The main purpose of the Programme is to stimulate collaboration and participation in basic research in the physics and chemistry of clouds and encourage application of this research with particular emphasis on the needs of weather prediction, weather modification and atmospheric pollution. This includes parameterization of clouds and precipitation processes in atmospheric models, the role of clouds in the radiative balance of the atmosphere, chemical transformation and transportation of pollutants, weather modification, etc. The programme provides information on the rationale underlying all aspects of weather modification and the role of clouds in atmospheric chemistry. It strives to identify uncertainties that inhibit progress and to encourage activities that contribute to their resolution. 1, record 7, English, - Physics%20and%20Chemistry%20of%20Clouds%20and%20Weather%20Modification%20Research%20Programme
Record 7, Key term(s)
- Physics and Chemistry of Clouds and Weather Modification Research Program
Record 7, French
Record 7, Domaine(s)
- Titres de programmes internationaux
- Climatologie
- Prévisions météorologiques et mesure et analyse des données
Record 7, Main entry term, French
- Programme de recherche sur la physique et la chimie des nuages et sur la modification artificielle du temps
1, record 7, French, Programme%20de%20recherche%20sur%20la%20physique%20et%20la%20chimie%20des%20nuages%20et%20sur%20la%20modification%20artificielle%20du%20temps
correct, masculine noun, international
Record 7, Abbreviations, French
- RPCNMAT 1, record 7, French, RPCNMAT
correct, masculine noun, international
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 OBS
... de l'Organisation météorologique mondiale. 1, record 7, French, - Programme%20de%20recherche%20sur%20la%20physique%20et%20la%20chimie%20des%20nuages%20et%20sur%20la%20modification%20artificielle%20du%20temps
Record 7, Spanish
Record 7, Campo(s) temático(s)
- Títulos de programas internacionales
- Climatología
- Previsiones meteorológicas, medición y análisis de datos
Record 7, Main entry term, Spanish
- Programa de Investigación sobre Física y Química de las Nubes y Modificación Artificial del Tiempo
1, record 7, Spanish, Programa%20de%20Investigaci%C3%B3n%20sobre%20F%C3%ADsica%20y%20Qu%C3%ADmica%20de%20las%20Nubes%20y%20Modificaci%C3%B3n%20Artificial%20del%20Tiempo
correct, masculine noun, international
Record 7, Abbreviations, Spanish
Record 7, Synonyms, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 1999-03-16
Record 8, English
Record 8, Subject field(s)
- Air Pollution
- Pollutants
- Climatology
Record 8, Main entry term, English
- aerosol dynamics
1, record 8, English, aerosol%20dynamics
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 CONT
The influences of chemical wastes on weather and climate could be greatly amplified when they affect clouds. The presence or absence of clouds and their nature can have dramatic effects, as can small changes in their frequency or placement; therefore, changes in clouds produced by aerosols generate enormous relative differences per unit of aerosol mass. Consequently, control attention should be directed especially to a chemical' s prospective effects on cloud modification and aerosol dynamics. 1, record 8, English, - aerosol%20dynamics
Record 8, French
Record 8, Domaine(s)
- Pollution de l'air
- Agents de pollution
- Climatologie
Record 8, Main entry term, French
- dynamique des aérosols
1, record 8, French, dynamique%20des%20a%C3%A9rosols
correct, feminine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
Les sujets pertinents aux aérosols comprennent l'interaction des aérosols avec les produits chimiques de l'atmosphère et avec les radiations électromagnétiques, la dynamique des aérosols, ainsi que les natures physiques et chimiques des fumées d'écrans, des agents chimiques, des poussières et des émanations, des agents biologiques, des retombées des détonations des armements nucléaires et, finalement, le relâchement des aérosols radioactifs lors d'accidents de réacteurs nucléaires. 2, record 8, French, - dynamique%20des%20a%C3%A9rosols
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 1997-11-11
Record 9, English
Record 9, Subject field(s)
- International Bodies and Committees
- Climatology
Record 9, Main entry term, English
- Panel of Experts on Weather Modification 1, record 9, English, Panel%20of%20Experts%20on%20Weather%20Modification
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 OBS
Also works as CAS Working Group on Cloud Physics and Weather Modification. 1, record 9, English, - Panel%20of%20Experts%20on%20Weather%20Modification
Record 9, French
Record 9, Domaine(s)
- Organismes et comités internationaux
- Climatologie
Record 9, Main entry term, French
- Groupe d'experts de la modification artificielle du temps
1, record 9, French, Groupe%20d%27experts%20de%20la%20modification%20artificielle%20du%20temps
masculine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record 9, Spanish
Record 9, Campo(s) temático(s)
- Organismos y comités internacionales
- Climatología
Record 9, Main entry term, Spanish
- Grupo de expertos sobre modificación artificial del tiempo
1, record 9, Spanish, Grupo%20de%20expertos%20sobre%20modificaci%C3%B3n%20artificial%20del%20tiempo
masculine noun
Record 9, Abbreviations, Spanish
Record 9, Synonyms, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 1995-06-01
Record 10, English
Record 10, Subject field(s)
- Meteorology
Record 10, Main entry term, English
- cross-over experiment
1, record 10, English, cross%2Dover%20experiment
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 DEF
Weather modification experiment whose design involves two areas, only one of which is seeded at a time, with the area for seeding being randomly selected for each time period. 1, record 10, English, - cross%2Dover%20experiment
Record 10, French
Record 10, Domaine(s)
- Météorologie
Record 10, Main entry term, French
- expérience croisée
1, record 10, French, exp%C3%A9rience%20crois%C3%A9e
correct, feminine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 DEF
Expérience de modification du temps réalisée sur deux zones que l'on ensemence une à la fois, la zone ensemencée étant choisie au hasard pour chaque période. 1, record 10, French, - exp%C3%A9rience%20crois%C3%A9e
Record 10, Spanish
Record 10, Campo(s) temático(s)
- Meteorología
Record 10, Main entry term, Spanish
- experiencia cruzada
1, record 10, Spanish, experiencia%20cruzada
correct, feminine noun
Record 10, Abbreviations, Spanish
Record 10, Synonyms, Spanish
Record 10, Textual support, Spanish
Record number: 10, Textual support number: 1 DEF
Experiencia de modificación del tiempo que comprende dos zonas, de las cuales sólo se siembra una cada vez; la zona de siembra se elige al azar en cada período. 1, record 10, Spanish, - experiencia%20cruzada
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: