What is the meaning of cyclonic depression
Depression* A cyclonic disturbance in which the maximum sustained surface wind speed is between 17 and 33 knots (31 and 61 km/h).
If the maximum sustained wind speed lies in the range 28 knots (52 km/h) to 33 knots (61 km/h) the system may be called a “deep depression”.
Direction of movement.
of the tropical cyclone..
Why do anticyclones bring clear skies and sunshine
Because more air is pushing down around the earth’s surface, rather than rising up in the air where it can cool and form clouds. This is why areas of high pressure (anti-cyclones) bring clear skies.
What are the stages in the life cycle of a polar front depression
Life cycle of this polar front depression has four stages. 1st stage (Figure 1) : Two different air masses are traveling at opposite directions. They meet along a line, which is called frontal boundary. 2nd stage (Figure 2) : A small wave-like disturbance develops on the frontal boundary between the two air masses.
What is a deep depression weather
A depression is a weather term meaning an area of low pressure, wind, cloud and usually rain.
Why is it windy in a depression
In a depression (also referred to as a ‘low’), air is rising. As it rises and cools, water vapour condenses to form clouds and perhaps precipitation. Consequently, the weather in a depression is often cloudy, wet and windy (with winds blowing in an anticlockwise direction around the depression).
What causes a frontal depression
Frontal or Polar Depressions The cold front usually moves across the surface faster than the warm front. The pressure near the top of the wave falls sharply and a depression forms.
How do depressions affect weather
An area of low pressure is called a depression . Air rises in a depression so clouds and rainfall are formed. Depressions therefore bring unsettled weather and rain. Winds are normally stronger.
Why does air rise in a depression
Under a depression air is rising, forming an area of low pressure at the surface. This rising air cools and condenses and helps encourage cloud formation, so the weather is often cloudy and wet. In the Northern Hemisphere winds blow in anticlockwise direction around a depression.
Is depression always caused by something
Research suggests that depression doesn’t spring from simply having too much or too little of certain brain chemicals. Rather, there are many possible causes of depression, including faulty mood regulation by the brain, genetic vulnerability, stressful life events, medications, and medical problems.
How would you identify a depression on a synoptic chart
A depression, as its name implies, is a region of low barometric pressure and appears on the synoptic chart as a set of closed curved isobars with winds circulating anticlockwise in the northern hemisphere, clockwise in the southern hemisphere.
What does depression mean in weather terms
Low pressure systemsA depression is an area of low pressure which moves from west to east in the northern hemisphere. Low pressure systems can be identified from a synoptic chart due to: cold fronts.
How do frontal depressions affect the weather in summer
Frontal depressions form where the warm air mass (from the equator) meets the cold air mass(from the poles). … In between the fronts (the warm sector) the temperature increases and the rain stops The warm air is now at ground level and is not being forced to rise.
Where are depressions formed
When a fast moving area of cold air moves into a region of warmer air it forces its way under the warm air, which is pushed upwards. As it rises, air pressure falls. This rising air can lead to a low pressure system or depression. Here is a reminder of the diagram showing warm rising over colder air.
What is a frontal depression
A frontal depression is a low-pressure area formed at the boundary between two different air masses. It occurs in middle or higher latitudes. … Since the density of warm air is less than that of the cold air, the bulge is an area of low pressure surrounded by areas of high pressure on three sides.
Why does the UK experience so many depressions
Air rising causes the formation of clouds, which brings rainfall. Depressions often move eastwards across the UK, bringing changeable weather as they travel. There are usually frontal systems associated with depressions.
What happens low pressure area
A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation. … Winds blow away from high pressure.