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Fiche 1,  Justifications,  Anglais

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An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low [cyclone].  7, fiche 1, Anglais, - barometric%20trough

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A trough of low pressure is merely an extended region of low pressure.... Troughs of low pressure are responsible for the most severe thunderstorms.  2, fiche 1, Anglais, - barometric%20trough

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 DEF

Région allongée dans laquelle la pression atmosphérique est relativement basse.  7, fiche 1, Français, - creux%20barom%C3%A9trique

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creux barométrique : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.  8, fiche 1, Français, - creux%20barom%C3%A9trique

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talweg : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).  9, fiche 1, Français, - creux%20barom%C3%A9trique

Fiche 1,  Justifications,  Espagnol

Record number: 1, Textual support number: 1 DEF

Región alargada de presión atmosférica relativamente baja.  2, fiche 1, Espagnol, - vaguada%20barom%C3%A9trica

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

The jet stream drives our weather through phenomena called troughing, ridging, and jet streaks. Troughs and ridges are curves in the jet stream that are analogous to low pressure(troughs) and high pressure(ridges). In the northern hemisphere, a trough is a southward dip in the jet stream and a ridge is a northward hump in the wind current. You can expect active weather ahead of a trough and quiet weather beneath a ridge.  2, fiche 2, Anglais, - troughing

Fiche 2,  Justifications,  Français

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

The jet stream drives our weather through phenomena called troughing, ridging, and jet streaks. Troughs and ridges are curves in the jet stream that are analogous to low pressure(troughs) and high pressure(ridges). In the northern hemisphere, a trough is a southward dip in the jet stream and a ridge is a northward hump in the wind current. You can expect active weather ahead of a trough and quiet weather beneath a ridge.  2, fiche 3, Anglais, - ridging

Fiche 3,  Justifications,  Français

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 DEF

An almost-continuous trough or belt of low pressure around the globe in the equatorial regions... where the NE trade winds(of the Northern Hemisphere) and the SE trades(of the Southern Hemisphere) converge, or come together.  6, fiche 4, Anglais, - intertropical%20convergence%20zone

Record number: 4, Textual support number: 1 OBS

The ITCZ is usually characterized by strong, ascending air currents, large areas of overcast skies, and frequent heavy showers and thunderstorms.  6, fiche 4, Anglais, - intertropical%20convergence%20zone

Record number: 4, Textual support number: 2 OBS

The term "intertropical convergence zone" (ITCZ) is generally preferred to the term "intertropical front" (ITF), as ITCZ characteristics are distinct from a front of higher latitudes.  7, fiche 4, Anglais, - intertropical%20convergence%20zone

Record number: 4, Textual support number: 3 OBS

inter-tropical convergence zone: term reproduced from "Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of UNESCO," with the authorization of UNESCO.  3, fiche 4, Anglais, - intertropical%20convergence%20zone

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 DEF

Mince zone où les alizés des deux hémisphères se rejoignent.  7, fiche 4, Français, - zone%20de%20convergence%20intertropicale

Record number: 4, Textual support number: 1 OBS

zone de convergence intertropicale : terme reproduit de «Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of UNESCO», avec l'autorisation de l'UNESCO.  8, fiche 4, Français, - zone%20de%20convergence%20intertropicale

Fiche 4,  Justifications,  Espagnol

Record number: 4, Textual support number: 1 DEF

Zona estrecha en la que se reúnen los vientos alisios de los hemisferios norte y sur.  4, fiche 4, Espagnol, - zona%20de%20convergencia%20intertropical

Record number: 4, Textual support number: 1 OBS

zona de convergencia intertropical: término reproducido del "Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of UNESCO", con la autorización de la UNESCO.  5, fiche 4, Espagnol, - zona%20de%20convergencia%20intertropical

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 CONT

What causes the negative tilt?(1) Strong middle and upper level winds wrapping around the base of the trough.(2) A strong jet streak near the base of a trough.(3) A ridge to the east of the trough(like a sideways inverted trough).(4) Occlusion of low pressure.  1, fiche 5, Anglais, - inverted%20trough

Fiche 5,  Justifications,  Français

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

Record number: 6, Textual support number: 1 DEF

A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, with showers and thunderstorms.  1, fiche 6, Anglais, - tropical%20wave

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 DEF

Courbe dans l'écoulement normalement droit de l'air de surface sous les tropiques, qui forme un creux de basse pression accompagné d'averses et d'orages.  1, fiche 6, Français, - onde%20tropicale

Record number: 6, Textual support number: 1 CONT

onde tropicale : Dite parfois aussi onde d'est, l'onde est définie comme étant un axe de basses pressions relatives, ou thalweg, au sein de l'alizé des zones intertropicales [...]  1, fiche 6, Français, - onde%20tropicale

Fiche 6,  Justifications,  Espagnol

Fiche 7,  Justifications,  Anglais

Record number: 7, Textual support number: 1 CONT

A trough axis(in association with a deep low pressure/heights) can be analyzed at each level of the troposphere(surface pressure trough, 850 mb, 700 mb, 500 mb and 300 mb).  1, fiche 7, Anglais, - deep%20low%20pressure

Fiche 7,  Justifications,  Français

Fiche 7,  Justifications,  Espagnol

Fiche 8,  Justifications,  Anglais

Record number: 8, Textual support number: 1 CONT

tropical wave : A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, with showers and thunderstorms. Can develop into a tropical cyclone.  1, fiche 8, Anglais, - develop

Fiche 8,  Justifications,  Français

Record number: 8, Textual support number: 1 CONT

onde tropicale : Courbe dans l'écoulement normalement droit de l'air de surface sous les tropiques, qui forme un creux de basse pression accompagné d'averses et d'orages. Elle peut se transformer en cyclone tropical.  1, fiche 8, Français, - se%20transformer

Fiche 8,  Justifications,  Espagnol

Fiche 9,  Justifications,  Anglais

Record number: 9, Textual support number: 1 CONT

A deep low pressure, a negatively tilted trough, and a warm and moist warm sector combination east of the Rockies often produces a severe weather outbreak.  1, fiche 9, Anglais, - severe%20weather%20outbreak

Fiche 9,  Justifications,  Français

Fiche 9,  Justifications,  Espagnol

Fiche 10,  Justifications,  Anglais

Record number: 10, Textual support number: 1 CONT

tropical wave : A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, with showers and thunderstorms.  1, fiche 10, Anglais, - straight%20flow

Fiche 10,  Justifications,  Français

Record number: 10, Textual support number: 1 CONT

onde tropicale : Courbe dans l'écoulement normalement droit de l'air de surface sous les tropiques, qui forme un creux de basse pression accompagné d'averses et d'orages.  1, fiche 10, Français, - %C3%A9coulement%20droit

Fiche 10,  Justifications,  Espagnol

Fiche 11,  Justifications,  Anglais

Record number: 11, Textual support number: 1 CONT

What causes the negative tilt?(1) Strong middle and upper level winds wrapping around the base of the trough.(2) A strong jet streak near the base of a trough.(3) A ridge to the east of the trough(like a sideways inverted trough).(4) Occlusion of low pressure.  1, fiche 11, Anglais, - base%20of%20trough

Fiche 11,  Justifications,  Français

Fiche 11,  Justifications,  Espagnol

Fiche 12,  Justifications,  Anglais

Record number: 12, Textual support number: 1 DEF

An interruption of the normal west-to-east flow at middle and high latitudes.  2, fiche 12, Anglais, - blocking%20situation

Record number: 12, Textual support number: 1 OBS

It [blocking pattern] persists from one to several weeks.... there are three kinds of blocks :... a high-over-low block in which the flow splits, one branch taking a poleward excursion and the other branch an equatorward excursion. Any traveling storms that approach the block from the west, tend to weaken and go either over the ridge(top of the block) or pass through the trough on the south side.... An "omega" block so named because the flow about this block resembles the Greek letter "Omega". Cyclonic(counterclockwise) circulations can occur both southwest and southeast of the block(where low pressure is indicated on the diagram), and the weather near them can be stormy. Within the block, however, the weather is benign and warmer than normal.... A stationary high-amplitude ridge. Such a ridge often forms just off the West Coast of North America in winter. If it persists, it steers Pacific storms far to the north and keeps the weather in British Columbia and the Pacific Northwest anomalously dry and mild.  2, fiche 12, Anglais, - blocking%20situation

Fiche 12,  Justifications,  Français

Record number: 12, Textual support number: 1 OBS

[Situation qui résulte de] l'obstruction de la marche normale ouest-est des cyclones et des anticyclones migrateurs.  1, fiche 12, Français, - situation%20de%20blocage

Fiche 12,  Justifications,  Espagnol