TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

... inclusion of the soil system in the buffering reactions introduces new sources of buffering which can retard pH depression in the system... the displacement of aluminum from exchange sites becomes a major source of buffering...  2, record 1, English, - buffering

Record number: 1, Textual support number: 1 OBS

to buffer: to add a buffer (to a solution).  3, record 1, English, - buffering

Record number: 1, Textual support number: 2 OBS

buffer: any substance in a solution that tends to stabilize the hydrogen ion concentration by neutralizing any added acid or alkali.  3, record 1, English, - buffering

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Action de verser un tampon dans une solution.  1, record 1, French, - tamponnage

Record number: 1, Textual support number: 1 OBS

tampon : mélange de solution dont le pH ne s'altère pratiquement pas au cours d'une dilution.  1, record 1, French, - tamponnage

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The direction toward which the wind is blowing; direction of flow vector.  1, record 2, English, - downwind

Record number: 2, Textual support number: 1 CONT

The pH of soils(0 to 12 cm deep) under closed canopies downwind from a gas processing plant in southern Alberta was depressed more than 0. 15 pH units in a three month period. A depression of 0. 15 pH units occurred within a 25, 000 km² area in central Alberta where half the sulphur emissions were upwind of the study area.  2, record 2, English, - downwind

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

On peut admettre que dans ce cas la diffusion horizontale s'effectue lentement par cercles concentriques à partir de la zone directement polluée. En revanche, par vent faible et modéré ou fort, les polluants sont emportés dans la direction du vent.  1, record 2, French, - dans%20la%20direction%20du%20vent

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Studies done in the past two years have shown that acidic snow resulted in severe depression of pH in streams and surface water of lakes during the spring runoff. The maximum increase in hydrogen ion concentration in the ten streams surveyed to date was up to 15 times the annual average. A spring pH depression is coincident with spring spawning of some species of fish and amphibians.  2, record 3, English, - pH%20depression

Record number: 3, Textual support number: 1 OBS

A pH drop is a sudden pH depression.  8, record 3, English, - pH%20depression

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

La mesure la plus simple de l'acidification des eaux de surface consiste en une comparaison dans le temps et dans l'espace des mesures de pH. S'il y a acidification, il y a baisse du pH. Par contre, cette baisse de pH constitue la dernière phase de l'acidification. Avant la baisse du pH, il y a eu chute du pouvoir tampon, par conséquent un indicateur des effets réels de l'acidification.  5, record 3, French, - abaissement%20du%20pH

Record number: 3, Textual support number: 1 OBS

Une chute de pH est une baisse soudaine du pH.  6, record 3, French, - abaissement%20du%20pH

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

Nitric acid may play a more significant role in short-term acidification associated with spring melt of nitrate containing snowpack by adding to the existing pH depression caused by sulphate. Studies to date of this phenomenon have found that sulphate concentrations still exceed nitrate on an equivalent basis, even during spring runoff.  1, record 4, English, - spring%20runoff

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

While much emphasis has been placed on reducing sulphur dioxide emissions, NOx emissions must also viewed with concern due to their contribution to the pH depression associated with the snowpack melt episodes.  1, record 5, English, - sulphur%20dioxide%20emission

Record number: 5, Textual support number: 1 OBS

sulphur: n. var., now esp. Brit., sp. of sulfur.  3, record 5, English, - sulphur%20dioxide%20emission

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

While much emphasis has been placed on reducing sulphur dioxide emissions, NOx emissions must also viewed with concern due to their contribution to the pH depression associated with the snowpack melt episodes. This depression, when imposed on the surface waters where the acidity has already been increased due to excess sulphates, results in levels of acidity that may be critical and occur at sensitive life stages of many aquatic organisms, even though the long-term average acidity may be tolerated by a normal biological habitat.  1, record 6, English, - long%2Dterm%20average%20acidity

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Both sulphuric and nitric acids contribute acidity to surface waters during periods associated with pH depression and fish stress. There is no strong evidence at present for anticipating any appreciable reduction in long-term lake or stream acidification from a reduction in nitrate inputs.  1, record 7, English, - long%2Dterm%20lake%20acidification

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

Nitric acid may play a more significant role in short-term acidification associated with spring melt of nitrate-containing snowpack by adding to the existing pH depression caused by sulphate.  1, record 8, English, - short%2Dterm%20acidification

Record 8,  Textual support,  French

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Both sulphuric and nitric acids contribute acidity to surface waters during periods associated with pH depression and fish stress. There is no strong evidence at present for anticipating any appreciable reduction in long-term lake or stream acidification from a reduction in nitrate inputs.  1, record 9, English, - long%2Dterm%20stream%20acidification

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

Workers in Sweden, Norway, and the United States reported that when snow melts, the first portion of the melt water is much more acidic than the last. This often causes a sudden drop in the pH of drainage streams and in lakes during early spring.  3, record 10, English, - pH%20drop

Record number: 10, Textual support number: 1 OBS

A pH drop is a sudden pH depression.  4, record 10, English, - pH%20drop

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 CONT

Bien qu'on n'y ait pas décelé des chutes évidentes du pH en 1981, les 4 rivières présentent non seulement des indices de vulnérabilité aux précipitations acides locales mais aussi des symptômes d'acidification graduelle.  1, record 10, French, - chute%20du%20pH

Record number: 10, Textual support number: 1 OBS

Une chute de pH est une baisse soudaine de pH.  2, record 10, French, - chute%20du%20pH

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  French

Record 11,  Textual support,  Spanish