Troughs and Ridges in the weather are more likely when the jet stream has a: A.

Question

Troughs and Ridges in the weather are more likely when the jet stream has a:

A. Zonal flow

B. Meridional flow

C. Upslope flow

D. None of the above

Please explain………………………………………………..

When the wind is strong and away (offshore) from the coastline on the west coast of South America, then it is more likely that near the coast in the ocean there will be:

A. Upwelling of warmer water

B. Downwelling of warmer water

C. Upwelling of cooler water

D. Downwelling of cooler water

Please explain………………………………………………..

Explanation / Answer

In Meriodional flow jet, streams are more likely to develop trough and ridges in the weather.Low-pressure systems tend to move faster (west to east) when associated with a zonal flow. A highly meridional flow can cause atmospheric blocking and spells of much below and much above normal temperatures. A meridional pattern, with its highly curved flow, generates more vorticity than that associated with a zonal flow.

The frictional drag force of a prevailing offshore can pull surface water away from a coast.Deepwater then upwells along the edge of the continental shelf to replace the surface water flowing from shore.wind blowing parallel to shore can also create upwelling. the wind causes water to flow parallel shore, but the Coriolis effect and Ekman transport defect the current, driving it away from the coast.Deepwater then rises to replace the surface water.

The west coast of South America, gets heat up and create a low-pressure zone there and the wind blows away from the coastline as a result of which upwelling of cooler water along with rich nutrients occur sustaining the ecosystem.

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