Low Pressure Atmospheric Systems

Low pressure atmospherical systems are withal known as depressions or cyclones and they form in mid- and lavishly-latitudes. They are create by the mixing of frore and warm air, the warm air is lighter, so it rises above the denser, cold air and forms a centre of low pressure. racy pressure atmospheric systems are also known as anticyclones and do very different characteristics to depressions. Anticyclones are large masses of subsiding air, which produces advanced pressure at the surface.There are a variety of difference betwixt anticyclones and depressions, including the support conditions, the length of era they last and the impact they make up upon different countries and areas. Low pressure atmospheric systems lot amaze hazards because of severe weather such(prenominal)(prenominal) as blizzards and heavy snowfall, as well as tall winds and heavy rainfall. This can have harsh impacts among individuals, being a bear cause of hypothermia, and frostbite, specially th ose vulnerable, such as the elderly. Also, these depressions can cause crops to be destroyed, and a lavishly mortality rate passim the spring lambing season.Extreme cold spells can have a massive negative effect on a global scale, but also in a item country or region. High pressure atmospheric systems affect the globe, especially the southern hemisphere, as it is nearly always continuous, although in places such as Australia and South Africa, this is broken throughout their summer. With anticyclones, there are few winds, so maps usually have circular spaced out isobars. Also, these atmospheric systems stop oer depressions, which mean that their impacts are usually long-term, because they are constant. Weather associated with anticyclones differentiates depending on the time of year.In summer, anticyclones produce long periods of dry, hot, sunny weather, which can then cause cacoethes waves and drought. However, in winter the cloudless nights mean that temperatures drop, and doe s not recover the following(a) day because of weak sunshine and lingering fog. The impacts of anticyclones and depressions vary, as does the period they hold on and the effect they have. The North American blizzard of two hundred3 lasted for five days throughout February and occurred on the East Coast of the USA and Canada. It was a record-breaking blizzard, which caused 27 finiss and over $14 million worth of damage.The cities in America were bought to a standstill, as there was a range of 38-76cm of snow covering the ground. The cause for such an unusually extreme blizzard was the fact that the conditions were favourable, with moisture from the Atlantic Ocean enhancing precipitation and a high pressure system over Canada, allowing cold air to be brought down coastal areas. This meant that the precipitation was principally snow, hence the record-breaking statistics. The effects this storm had were mainly compact-term, but the jacket crown of the historic Railroad Museum coll apsed and 27 people lost their lives.Additionally, transport cornerstone was brought to a halt, and three major airports were also closed. So, the impacts of depressions are mainly short-term, although the demolition can be horrendous, whereas, anticyclones usually cause long-term impacts on a country such as the Drought in Britain and Europe in 2003. This drought effected many locations, but the main focus was on the UK, France and Portugal. Not all impacts are negative, as the heat wave did come along the tourist industry in most countries and sales for summer items such as barbeques and sun cream increased, but this positive outlook is short-lived.In the UK, an estimated 200 people lost their lives due to poor air quality, and this figure was 10% higher than the average. Furthermore, transport was disrupted because of roads melting at such high temperatures, and the London Underground was 37, which is over the legal line to transport animals. Finally, in the UK the cost of pe ople taking days turned work to enjoy the hot weather was between ?7. 5million and ?10million per day. In France, the death toll was as high as 30,000 and harvests were down by 30 to 50% on 2002.Additionally, the nuclear power plants could not produce the arise demands for energy, which was used for refrigerators and air conditioning, because there was less water available for cooling. Portugal say a State of Emergency after the worst forest fires in 30 years. Approximately 35,000 hectares of forest, farmland and scrub was burned, and 1300 people died. 80 families were force to abandon their homes, and arsonists begun deliberately causing fires, to gain compensation. The impacts of anticyclones on all of these countries had a massive effect, and it lasted over a month, with the hottest temperatures for up to 500 years.This demonstrates the long and short term impacts that anticyclones have on regions, countries and on a global scale. positioning does have a result on the impact of low and high atmospheric pressure systems because they can be underdeveloped or have a lot of technology that can be damaged or ruined. MEDCs usually lose fewer lives than LEDCs, no matter if it is a depression or a cyclone. Also, the evidence seems to suggest that depressions have a shorter impact on an area than anticyclones, but this is not necessarily true.Long-term supplemental hazards can be a large issue after a depression, as the damage from flooding or heavy snow can be excessive and highly damaging. I conclude, low pressure atmospheric systems do usually have shorter-term impacts on a location, rather than high pressure atmospheric systems, but the secondary hazards can be a long-term issue for twain of these hazards. Furthermore, the impact they have, may be different, depending on location, because a LEDC will be severely affected by both of these hazards, and will most likely have long-term consequences.