TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 OBS

Plume Behavior Descriptors : Coning.... Fanning.... Lofting.... Fumigation.... Looping.  2, record 1, English, - fumigating%20plume

Record number: 1, Textual support number: 2 OBS

Plume Behavior Descriptors :Fumigation. Ambient air unstable below, inversion aloft. [An illustration of the plume is included in the page. ]  3, record 1, English, - fumigating%20plume

Record number: 1, Textual support number: 3 OBS

See "fumigation".  1, record 1, English, - fumigating%20plume

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

Inversion de température en altitude. Les polluants s'accumulent au niveau où règne l'inversion de température. Selon que l'inversion se situe dans les couches inférieures ou supérieures au panache de fumée, celui-ci est tourmenté vers le haut («lofting») ou vers le bas (enfumage).  2, record 1, French, - panache%20tourment%C3%A9%20vers%20le%20bas

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Prepared flight plan for helicopter(KOPTER) to traverse plume roughly at right angles in the pre-fumigation zone, the fumigation zone, as well as slightly further downwind.  1, record 2, English, - fumigation%20zone

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Prepared flight plan for helicopter(KOPTER) to traverse plume roughly at right angles in the pre-fumigation zone, the fumigation zone, as well as slightly further downwind.  1, record 3, English, - pre%2Dfumigation%20zone

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 OBS

"trapping": When an inversion occurs aloft such as frontal or subsidence inversion a plume released beneath the inversion will be trapped beneath it. Even if the diffusion is good beneath the inversion such as a coning plume, the limit to upward diffusion will increase concentration in the plume and at ground level.  2, record 4, English, - trapped%20plume

Record number: 4, Textual support number: 2 OBS

Trapping exists under the same conditions as fumigation but the plume does not reach ground level along the plume length.  3, record 4, English, - trapped%20plume

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

"Panaches piégés" : Lorsqu'il se produit en altitude une inversion telle qu'une inversion frontale ou une inversion de subsidence, les panaches émis sous l'inversion sont piégés entre l'inversion et la surface de la terre. Même si la diffusion est bonne sous l'inversion, comme dans le cas des panaches coniques, elle est limitée vers le haut, de sorte que la concentration des polluants augmente dans le panache et au sol. La variation diurne des gradients thermiques près du sol, dans les campagnes éloignées des sources de chaleur urbaines, lorsque le ciel est dégagé, est illustrée à la figure 5. Dans de telles conditions, le gradient thermique décrit un cycle quotidien marqué, dans les quelques premières centaines de mètres au-dessus du sol.  1, record 4, French, - panache%20pi%C3%A9g%C3%A9

Record number: 4, Textual support number: 1 OBS

[l'allure d'un panache varie en fonction des états de l'atmosphère.] Inversion de température débutant au niveau du sol et dépassant le niveau d'émission des fumées. [Dans ces conditions] le panache s'étale horizontalement et reste très étroit, le terrain environnant la source d'émission est emprisonné sous un toit de fumée, la pollution y est très forte.  3, record 4, French, - panache%20pi%C3%A9g%C3%A9

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

A well developed circulation can penetrate as far as 50 km inland. During sea breeze situations an interesting air pollution problem arises. This will be illustrated using the north shore of Lake Ontario as an example. Several thermal generating stations are opened near the coast. During a sea breeze situation..., their emissions are adverted inland relatively undispersed in stable air. Eventually the well-mixed layer whose thickness increases inland intercepts the plume and brings it to the ground. The result is stationary fumigation which persists much longer than the event-type of fumigation that occurs in late morning during the breakup of a nocturnal inversion.  1, record 5, English, - stationary%20fumigation

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish