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Qu'est-ce (qui) est upwelling - définition

REPLACEMENT BY DEEP WATER MOVING UPWARDS OF SURFACE WATER DRIVEN OFFSHORE BY WIND

Coastal upwelling; Cold water wake; Upwelled; Upwelling current; Upwelling currents

upwelling

¦ noun a rising up of seawater, magma, or other liquid.

¦ adjective (especially of emotion) building up.

Upwelling

Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface. It replaces the warmer and usually nutrient-depleted surface water.

https://en.wikipedia.org/wiki/Upwelling

Upwell railway station

RAILWAY STATION IN THE UK

Upwell railway station (Upwell Tramway)

Upwell railway station was a station in Upwell, Norfolk on the Wisbech and Upwell Tramway. It was opened in 1883 to carry passengers and agricultural wares to Wisbech where they would go to market, or be shipped off to other towns or cities.

https://en.wikipedia.org/wiki/Upwell_railway_station

Wikipédia

Upwelling

Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface. It replaces the warmer and usually nutrient-depleted surface water. The nutrient-rich upwelled water stimulates the growth and reproduction of primary producers such as phytoplankton. The biomass of phytoplankton and the presence of cool water in those regions allow upwelling zones to be identified by cool sea surface temperatures (SST) and high concentrations of chlorophyll-a.

The increased availability of nutrients in upwelling regions results in high levels of primary production and thus fishery production. Approximately 25% of the total global marine fish catches come from five upwellings, which occupy only 5% of the total ocean area. Upwellings that are driven by coastal currents or diverging open ocean have the greatest impact on nutrient-enriched waters and global fishery yields.

https://en.wikipedia.org/wiki/Upwelling

Exemples du corpus de texte pour upwelling

1. Food in upwelling waters support some of the most productive fisheries in the world.

2. But this year, the winds have been unusually weak, failing to generate much upwelling and reducing the amount of phytoplankton.

3. Strong upwelling winds pushed a low–oxygen pool of deep water toward shore, suffocating marine life, said Jane Lubchenco, a professor of marine biology at OSU.

4. But a powerful male backlash has accompanied the women‘s revolution, an upwelling of resentment that has expressed itself in sexual violence and harassment.

5. Some dead zones return each summer, depending on winds that generate upwelling, in which nutrient–rich water is brought to the surface from lower depths.