Which of the following statements is/arecorrect with reference to the ...
- Statement 1 is correct: Anticyclones are the opposite of cyclones, with high pressure in the centre and the isobars far apart. The pressure gradient is gentle and winds are light.
- Statement 2 is correct: Anti-cyclones normally herald fine weather. Skies are clear. The air is calm and temperatures are high in summer but cold in winter. In winter intense cooling of the lower atmosphere may result in thick fogs. Anti-cyclonic conditions may last for days or weeks and then fade out quietly.
- Statement 3 is not correct: Winds in anticyclone’ blow outwards and are also subject to deflection, but they blow clockwise in the northern hemisphere and anticlockwise in the southern hemisphere.
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Which of the following statements is/arecorrect with reference to the ...
Anti-cyclones are areas of high atmospheric pressure, and they are characterized by clear skies and calm air. The following statements are correct with reference to anti-cyclones:
1. They have high pressure at the centre: Anti-cyclones are areas of high atmospheric pressure, and the pressure is highest at the centre, also known as the 'high-pressure cell'.
2. They are characterized by clear skies and calm air: Anti-cyclones are associated with stable atmospheric conditions, and they produce clear skies and calm air. This is because the sinking air in the centre of the anti-cyclone suppresses cloud formation and convection.
3. Winds in anti-cyclones blow anticlockwise in the northern hemisphere and clockwise in the southern hemisphere: This statement is incorrect. In the northern hemisphere, winds in anti-cyclones blow clockwise, while in the southern hemisphere, they blow anticlockwise. This is due to the Coriolis effect, which causes the direction of the wind to be deflected to the right in the northern hemisphere and to the left in the southern hemisphere.
In conclusion, the correct statements with reference to anti-cyclones are 1 and 2 only.
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