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1. • Regions where the air is rising

     

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     • Troughs are part of the broader atmospheric circulation patterns. They are typically associated with regions where the air is rising. As air rises within a trough, it can cool and condense, leading to cloud formation and potential precipitation.
     climavision.com/blog/weather-troughs-formations-impacts-and-types/

     Weather Troughs: Formations, Impacts, and Types - Climavision

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   What causes a trough to form?

   • Rising Air: As the warmer, less dense air is forced to rise over the cooler, denser air, it creates a region of lower pressure—a trough—along the boundary. Atmospheric Disturbances: Other factors like the Earth’s rotation (Coriolis effect) and the presence of mountains can also influence trough formation by enhancing the lifting of air.

   Weather Troughs: Formations, Impacts, and Types - Climavision

   climavision.com/blog/weather-troughs-formations-impacts-and-types/

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   What causes a trough in an air mass?

   • Air Mass Convergence: Troughs often develop when two different air masses meet. For instance, a warm, moist air mass colliding with a cooler, dry air mass can create a boundary where the air converges.

   Weather Troughs: Formations, Impacts, and Types - Climavision

   climavision.com/blog/weather-troughs-formations-impacts-and-types/

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   How does a glacial trough form?

   • Tour guide: That’s a good explanation, thank you. The formation of a glacial trough involves two processes abrasion and plucking. Abrasion is when pieces of debris in the glacier wear away at the rocks below, a bit like sandpaper. The sharper rocks in the ice can also cause scratches in the rocks called striations.

   Formation of a glacial trough - BBC

   www.bbc.co.uk/gcsebitesize/audio/geography/pdf/formation_of_a_glacial_trough.pdf

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   What is a trough on a weather map?

   • They are typically associated with regions where the air is rising. As air rises within a trough, it can cool and condense, leading to cloud formation and potential precipitation. Troughs are often depicted on weather maps as elongated lines or contours of lower pressure. They are labeled with dashed lines.

   Weather Troughs: Formations, Impacts, and Types - Climavision

   climavision.com/blog/weather-troughs-formations-impacts-and-types/

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   What happens when air rises in a trough?

   • As air rises within a trough, it can cool and condense, leading to cloud formation and potential precipitation. Troughs are often depicted on weather maps as elongated lines or contours of lower pressure. They are labeled with dashed lines. There are two types of troughs, that each indicate a different weather pattern:

   Weather Troughs: Formations, Impacts, and Types - Climavision

   climavision.com/blog/weather-troughs-formations-impacts-and-types/

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   What does a trough look like?

   • Troughs are marked with a black dashed line, and ridges with a white zig-zag line. However, this flow is unstable, allowing small disturbances (e.g., flow over mountain ranges) to grow into large north-south meanders (Fig. 11.49b) of the jet stream. These meanders are called Rossby waves or planetary waves. Typical wavelengths are 3 - 4 Mm.

   11.11: Extratropical Ridges and Troughs (Rossby Waves)

   geo.libretexts.org/Bookshelves/Meteorology_and_Climate_Science/Practical_Meteorology_(Stull)/11:_General_Circulation/11.11:_Extratropical_Ridges_and_Troughs_(Rossby_Waves)

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3. www.bbc.co.uk › bitesize › guidesU-shaped valleys and their features - Glaciated upland ... - BBC

   www.bbc.co.uk › bitesize › guides

   Corries, pyramidal peaks and U-shaped valleys form due to glaciation. Glaciated uplands are used for different land uses which can lead to conflict. Strategies must be adopted to deal with these.

4. www.bbc.co.uk › bitesize › guidesGlacial processes and landforms - AQA Glacial landforms ... - BBC

   www.bbc.co.uk › bitesize › guides

   Learn about and revise glacial landforms and processes, including weathering, erosion, transportation and deposition, with GCSE Bitesize Geography (AQA).

5. www.bbc.co.uk › formation_of_a_glacial_troughFormation of a glacial trough - BBC

   www.bbc.co.uk › formation_of_a_glacial_trough

   The formation of a glacial trough involves two processes abrasion and plucking. Abrasion is when pieces of debris in the glacier wear away at the rocks below, a bit like sandpaper. The...

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6. en.wikipedia.org › wiki › Trough_(meteorology)Trough (meteorology) - Wikipedia

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   Formation. A trough is the result of the movements of the air in the atmosphere. In regions where there is upward movement near the ground and divergence at altitude, there is a loss of mass. The pressure becomes lower at this point.

7. geo.libretexts.org › Bookshelves › Meteorology_and11.11: Extratropical Ridges and Troughs (Rossby Waves)

   geo.libretexts.org › Bookshelves › Meteorology_and

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   Troughs are marked with a black dashed line, and ridges with a white zig-zag line. However, this flow is unstable, allowing small disturbances (e.g., flow over mountain ranges) to grow into large north-south meanders (Fig. 11.49b) of the jet stream.

8. www.savemyexams.com › gcse › geographyGlacial Landforms: Troughs & Corries GCSE Geography Revision

   www.savemyexams.com › gcse › geography

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   Aug 9, 2024 · Learn about the formation of glacial landforms from corries to troughs, along with examiner tips and worked examples for the AQA GCSE Geography exam.