Cyclones and anticyclones are endless tailor’s weather (no) chance that our day-day returns and alternate heat, cold, wind, rain, snow, judges and clouds. Just as there is harmony and connectedness of everything in nature there is a strong interconnection of the two systems. Anticyclone has no cyclones, and vice versa. At the beginning we will clarify what is to cyclones and anticyclones and as they occur.
Earth is surrounded by a gaseous layer – the atmosphere. The atmosphere has several layers of which are to weather the most important layer directly above the ground – the troposphere. All the time processes occur exactly in the troposphere. Troposphere is not everywhere equally thick, thinner than the poles where high 6-8 km from the ground. Is thickest over the equator where reaches even 18-20 km. The atmosphere (troposphere) there are various gases and compounds and solid and liquid particles. Together they form a physical mixture which is called air. The particles of air is constantly moving and hitting everything they can get on the road and thus act as a constant force on a particular surface. If this force is divided by the surface on which vertically acts get everyone to know the air pressure.
To put it simply, the air pressure is nothing more than its weight! Air pressure, unlike some other climate elements such as temperature, wind and humidity, we cannot directly feel. But many people feel some discomfort in the sudden drop in pressure, which is often associated with hot and humid weather with southerly winds (WEATHER bad situation), a better feel for the increase in air pressure when the north-eastern wind and humidity is reduced. Devices for measuring air pressure are called a barometer. But we find there is no barometer at sea we can determine where the center of high and low pressure of the useful Buys-Ballatovom rules that says: When the wind blows us in the back area of high pressure is back on the right, a low front left. In addition, any old ‘sea dog’ and he knows the sea to see if the air pressure is high or low.
The atmospheric pressure is one of the modifier tides. Both expressed high pressure boosts low tide at sea, a low pressure intensifies tide. In late February 2008, the pressure is on the Adriatic was a record high, and in many places it passed 1045hPa! It is this unusual high pressure air for our region supported several days expressed low tide that lowered sea level several feet below normal so many boats in the shallow bays and harbors, remained on dry land. On the other hand, low pressure can cause pronounced boot. One of the most famous tide associated with low pressure occurred 19.11.1999. When completely flooded Split waterfront with storm and hurricane (lebićadu) and destructive waves. Center of deep cyclones that day there just in the central Adriatic. Ebb in the first example and the tide in the second are directly related to atmospheric pressure.
When the air pressure is high then an imaginary column of air above ground or sea level to the top of the atmosphere are higher than when the air pressure is low. Higher pressure means the force with which the air presses the surface of the soil and the sea, so the sea level is falling. Conversely, at a low-pressure sea level rises because the smaller force to air presses its surface. Now we see that the high pressure associated with the anticyclone, with a low cyclone. Air pressure in meteorology usually expressed in hectopascals (hPa). There are no specific air pressure values with which binds cyclones or anticyclones.
The important thing is that the anticyclone pressure still higher than in the surrounding areas, and the cyclones lower than the surrounding area. For example, the air pressure of 1010hPa in Zadar one will be tied to the cyclone, the second time with the anticyclone. But it is assumed that the medium pressure air standard atmosphere at sea level 1013,25hPa. This in turn means that the pressure of 1010hPa is lower than the middle and will be more likely to be linked with the cyclone but anticyclone. It is important to emphasize that cyclones and anticyclones not associated with warm or cold weather! Both systems can be connected to the hot and the cold weather.
For example, on the Adriatic coast in summer the time usually works Azores High, which typically brings high air temperatures. In winter the contrary, when the weather begins to operate a branch of the Siberian anticyclone, and it is with this anticyclone bind the lowest air temperature of the Adriatic measures during the year. But one thing is certain; anticyclone associated with the stable, and a cyclone with an unstable time! In the vertical section of the two systems can be clearly observed lowering of air in anticyclones and lifting the cyclones. The rules of physics are simple in this regard; air that descends always heats and dries out (so anticyclone associated with stable weather), and the air is cooled when lifting, the water vapor in it condenses (because cyclones bring clouds and precipitation).
When we met with the concept of cyclones and anticyclones below will clarify how this system generated high and low air pressure. All the warmth of the earth comes from the sun. Because the Earth is round, and its surface is inhomogeneous (not uniform because there are sea and land surface with its relief and the surface under the ice and snow), some parts of the Earth is unevenly heated.
Areas closer to the equator constantly receive more energy from the sun than the folds are one of the hottest areas on earth. Polar Regions loss of more power than the prime, but the coldest areas of the planet. Atmospheric processes are directed constantly attempting to equalize the temperature of the whole earth, but that is because of these reasons this is impossible, this process is endless. Air circulation of planetary dimensions is responsible to the Polar Regions warmer and colder than the equatorial would be that there is this natural ‘air conditioner’.
Over large areas will be developed huge air masses of certain properties. One will be warmer, others colder. One will be rich with moisture, other dry, all depending on the type of substrate over which they are located. All of the air masses on Earth are divided into 4 basic: arctic, polar, tropical and equatorial. For areas of temperate latitudes, like ours, are particularly important two air masses: the polar and tropical. It was moderately wide areas of permanent ‘crash’ and exchanging these air masses very different properties. The air in the tropical air masses warmer and wetter than in the Arctic. These two different air masses are a kind of ‘parents’ future cyclones! On the border of contact of these two air masses air is not mixed and flowing in opposite directions (stationed Front). At one point on the front line appears wave accompanied by a decline in air pressure. The wave of colder air from the north began to advance towards the south, and the warmer north. The amplitude of the wave will continue to grow because warm air from the south, deeply penetrate to the north, a cold south. This establishes a reverse circulation clockwise as the main characteristic of each cyclone! It is therefore understandable that the word cyclone in Greek means ‘spin’ or ‘bend’.
Develop the cold and warm sector with associated frontal systems and new cyclone was born. Carried strong west winds in the higher layers cyclones usually move from west to east. That’s why most of us change time arrives from the west! At a young cyclones air pressure constantly falling (deepening cyclone), and the lowest pressure recorded in the center of the cyclone. Air pressure in cyclones generally decreases moving from the periphery to the center of the cyclone, and grow from the center to the periphery. Cold air in cyclones moving faster than warm or cold front gradually overtaking warm and this process is called occlusion. The moment of peak life cyclones. At the beginning of the occlusion show its gradual weakening. Warm air is increasingly evicted in height and the periphery of the cyclone, the narrowing terrestrial warm sector until it is replaced by cold air. Pressure is growing, and when the cool air wash over the entire ground floor area cyclone disappears. Cyclones often come one after the other (family cyclone), so they know to support an unstable time for many days.