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THUNDERSTORM ACTIVITY [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-08-31

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
CONT

Total lightning activity in thunderstorms. Total lightning is the combination of all forms of cloud(CLD) and cloud-to-ground(CG) lightning produced by a thunderstorm.

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
CONT

Les travaux du laboratoire présentent l'originalité d'introduire, en plus de l'activité d'éclairs nuage-sol, l'activité totale d'éclairs en la considérant sous deux formes, soit la totalité des éclairs (nuage-sol et intra-nuage), soit le nombre de sources rayonnantes en VHF [très hautes fréquences.]

Key term(s)
  • activité totale d'éclair

Spanish

Save record 1

Record 2 2004-12-10

English

Subject field(s)
  • Titles of Federal Government Programs (Canadian)
  • Meteorological Forecasting, Data Measurement and Analysis
OBS

Environment Canada developed a Severe Thunderstorm Watch/Warning Program across Canada to ensure the safety and well-being of all Canadians. The purpose of this program is to deliver Severe Thunderstorm and Tornado Watch/Warning Bulletins. These bulletins are designed to provide as much advance warning as possible of hazardous thunderstorm activity and tornadoes. In addition to a continuous surveillance system(e. g., satellite or meteorological radar coverage), the Program relies on weather observations provided by volunteer weather watchers.

French

Domaine(s)
  • Titres de programmes fédéraux (Gouvernement canadien)
  • Prévisions météorologiques et mesure et analyse des données

Spanish

Save record 2

Record 3 2004-10-12

English

Subject field(s)
  • Atmospheric Physics
DEF

High-altitude atmospheric wave produced by auroral heating and propagated from high latitudes towards the equator.

CONT

Travelling ionospheric disturbances ... are probably a cause of focusing and defocusing of radio waves. The disturbance usually appears at higher frequencies, gradually affecting lower frequencies. Some are associated with magnetic storms and originate in the auroral zone. These may travel great distances. Others appear to be more localised, originating in the troposphere in local weather.

CONT

Travelling Ionospheric Disturbance(TID) is a ripple or wave in the electron density structure that propagates horizontally which affects the refraction of radiowaves and so degrades directional finders. There are two main types :. large-scale TID with 1000 km or more between wave crests usually moving from pole to equator and generated by auroral activity;. medium-scale TID with hundreds of km wavelengths thought to be generated by thunderstorm activity.

Key term(s)
  • traveling ionospheric disturbance

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Onde atmosphérique de haute altitude produite par un réchauffement auroral et qui se propage des latitudes élevées vers l'équateur.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Onda atmosférica a niveles altos que se propaga desde las latitudes altas hacia el Ecuador, originada por el calentamiento producido por las auroras.

Save record 3

Record 4 2004-09-24

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
DEF

Indicating or having equal frequency or intensity of thunderstorm activity.

CONT

isoceraunic line. A line drawn through geographical points at which some phenomenon connected with thunderstorms has the same frequency or intensity. Its most recent specific use is for lines of equal frequency of lightning discharges.

PHR

Isoceraunic chart, level, line, map.

PHR

Isokeraunic activity, chart, level, line, map.

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
CONT

Pour exprimer la probabilité des coups de foudre dans une région, on dresse des cartes portant des courbes «isokérauniques» : des lignes joignant les points connaissant le même nombre de jours orageux dans l'année. La France offre quatre zones isokérauniques de plus de 30 jours.

PHR

Courbe, niveau isocénaurique.

PHR

Carte, courbe, niveau isokénaurique.

Spanish

Campo(s) temático(s)
  • Previsiones meteorológicas, medición y análisis de datos
Save record 4

Record 5 2004-09-24

English

Subject field(s)
  • Meteorological Forecasting, Data Measurement and Analysis
DEF

Line joining geographical points at which a particular phase of thunderstorm activity occurred simultaneously.

French

Domaine(s)
  • Prévisions météorologiques et mesure et analyse des données
DEF

Ligne joignant les points géographiques où une phase particulière d'activité orageuse se présente simultanément.

OBS

Cette représentation permet de calculer la vitesse, la trajectoire et l'extension des phénomènes orageux.

Spanish

Campo(s) temático(s)
  • Previsiones meteorológicas, medición y análisis de datos
DEF

Línea que une los puntos geográficos en los que se produce simultáneamente una fase especial de la actividad tormentosa.

Save record 5

Record 6 2004-07-30

English

Subject field(s)
  • Radio Interference
  • Meteorology
DEF

Short-duration, high-intensity, electric current wave which may sweep through an electrical network, such as a power transmission network, when a portion of it is strongly affected by the electrical activity of a thunderstorm.

French

Domaine(s)
  • Perturbations radio
  • Météorologie
DEF

Onde de courte durée et d'intensité élevée du courant électrique qui peut parcourir un réseau électrique, tel qu'un réseau de transport, lorsqu'une de ses parties est fortement influencée par l'activité électrique d'un orage.

Spanish

Campo(s) temático(s)
  • Perturbaciones radioeléctricas
  • Meteorología
DEF

Onda de corriente eléctrica, de corta duración y gran intensidad, que puede recorrer una red eléctrica, tal como una línea de transmisión, cuando una parte de ella es fuertemente afectada por la actividad eléctrica de una tormenta.

Save record 6

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