It has been suggested that this article or section be merged into Anticyclone. (Discuss)

, high-pressure cell, or high pressure area is a region where the atmospheric pressure is greater than the surrounding area. In some countries, these regions may be referred to as anticyclones. Highs are frequently associated with light winds and subsidence. Subsidence will generally evaporate most cloud droplets after less than 500 meters, due to adiabatic heating. Thus, high pressure typically brings clear skies. During the day, since no clouds are present to reflect sunlight or reflected infrared, there is more incoming shortwave solar radiation and temperatures are higher in the summer and lower in the winter. At night, the absence of clouds means that outgoing longwave radiation (i.e. heat energy from the surface) is not absorbed, giving cooler diurnal low temperatures in all seasons. Wikipedia does not have an article with this exact name. ... In meteorology, an anticyclone (that is, opposite to a cyclone) is a weather phenomenon in which there is a descending movement of the air and a high pressure area over the part of the planets surface affected by it. ... Diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure) Atmospheric pressure is the pressure at any point in the Earths atmosphere. ... In meteorology, an anticyclone (that is, opposite to a cyclone) is a weather phenomenon in which there is a descending movement of the air and a high pressure area over the part of the planets surface affected by it. ... A road destroyed by subsidence and shear. ... In thermodynamics, an adiabatic process or an isocaloric process is a process in which no heat is transferred to or from the working fluid. ... Solar irradiance spectrum at top of atmosphere. ... Longwave radiation is a term used to describe the infrared energy emitted by the earth and atmosphere at wavelengths between about 5 and 25 micrometers. ... Diurnal temperature variation is a viticultural term that relates to the variation in temperature that occurs from the highs of the day to the cool of nights. ...

Climatologically, high pressure forms at the Horse Latitudes as a result of air which has been uplifted at the equator, transported poleward, and cooled. This is also known as Hadley Cell circulation. Many of the world's deserts are associated with these climatological high pressure systems. Horse latitudes or Subtropical High are subtropical latitudes between 30 and 35 degrees both north and south, characterized by light winds and hot, dry weather, caused by descending air. ... World map showing the equator in red In tourist areas, the equator is often marked on the sides of roads The equator marked as it crosses Ilhéu das Rolas, in São Tomé and Príncipe. ... The Hadley cell is a circulation pattern that dominates the tropical atmosphere, with rising motion near the equator, poleward flow 10-15 kilometers above the surface, descending motion in the subtropics, and equatorward flow near the surface. ... A dune in the Egyptian desert In geography, a desert is a landscape form or region that receives little precipitation. ...

Surface high pressure systems tend to be larger in area and have weaker surface winds than low pressure systems, due to the addition of surface friction to the pressure gradient and coriolis effect that drives the circulation. In the inertial frame of reference (upper part of the picture), the black object moves in a straight line. ...

Some high pressure areas persist long enough that they acquire names. The land-based Siberian High often remains quasi-stationary for more than a month during the most frigid time of the year, making it unique in that regard. Citizens of the United States are aware of the Azores High, also known as the Bermuda High, which brings fair weather over much of the North Atlantic Ocean. Along its southerly periphery, the clockwise circulation often impels easterly waves across the ocean towards North America during the hurricane season. The Siberian High is a massive collection of cold or very cold dry air that accumulates on the Eurasian terrain for much of the year. ... The Azores High, also known as the Bermuda High in the United States, is a large subtropical semi-permanent centre of high atmospheric pressure found near the Azores in the Atlantic Ocean, at the Horse latitudes. ... It has been suggested that this article or section be merged into Tropical wave. ... North America North America is a continent[1] in the Earths northern hemisphere and (chiefly) western hemisphere. ... This article is about weather phenomena. ...

See also

• Anticyclone
• Atmospheric circulation
• Block (meteorology)
• Low pressure area
• North American High