Pub. date: 2008 | Online Pub. Date: April 25, 2008 | DOI: 10.4135/9781412963893 | Print ISBN: 9781412958783 | Online ISBN: 9781412963893| Publisher:SAGE Publications, Inc.About this encyclopedia
CYCLONES ARE METEOROLOGICAL systems consisting of areas of low pressure where the winds in the Northern Hemisphere and Southern Hemisphere rotate counter-clockwise and clockwise, respectively. The biggest storms around the world, such as cyclones, are intensifying. It is reported that the number of category four and five tropical cyclones, which are very intense, have increased over time. One reason for this is the impact of global warming, in particular, the effect of increased sea-surface temperature. Cyclones are often subdivided into other types, which include tropical cyclones and extra-tropical cyclones. Other types of cyclones include polar, polar low, subtropical, and mesoscale cyclones. Tropical cyclones are low-pressure systems consisting of large rotating systems of clouds and winds, which occur over tropical and subtropical waters. They also have thunderstorm activity and cyclonic surface wind circulation. Depending on their location and strength, there are various terms by which tropicai cyclones are known, such as ...