How weather works(Part 2)

In this section we look at what happens in the atmosphere to create the day-to-day weather that we experience.

The weather affects us all, from the simple act of raising an umbrella to an aeroplane changing its course to avoid a thunderstorm.

The earth's atmosphere exhibits an extraordinary variety of weather phenomena. On a local level, we may feel a gust of wind that lasts just a few seconds. On a global scale, the circulations of huge tropical Hadley cells determine whole regional climates and weather systems. The world's weather is perpetually on the move, pushed and shaped by air currents in the atmosphere. Our personal experience of weather from day-to-day is a tiny sample of this global weather system.

In this section, we look at these processes and changes in the earth's atmosphere which cause the weather we experience each day here in Cornwall

Pacific Decadal Oscillation (PDO)

The Pacific Decadal Oscillation (PDO) is a climatic event which cover vast areas of the Pacific Ocean over periods of 20 to 30 years.

What is the Gulf Stream?

The Gulf Stream is a small part of something called the Thermohaline Circulation or Atlantic Meridional Overturning Circulation. This is a large, global-scale ocean conveyor belt driven by differences in temperature and salt conte.

What do satellite pictures show?

They may only show a snapshot of the current weather, but they can tell us a lot about what to expect in the coming days

Beaufort wind scale

The Beaufort wind scale is a standard scale, running from force 0 for calm to force 12 hurricane and above for the description of wind speed. Each value represents a specific range and classification of wind speeds with accompanying descriptions of the effects on surface features. 

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