In a Hochdruckgebiet air masses drop spaciously. Warms upitself air adiabatically, so that no condensation and therefore Wolkenbildung can take place. At ground level air flows out of the Hochdruckgebiet toward Tiefdruckgebiete outside - it diverges. There are therefore in the high no fronts.
In the Northern Hemisphere the wind flows aroundHighly in the clockwise direction, thus in the mathematically negative direction of rotation, in the Southern Hemisphere accordingly in reverse. The direction of rotation is determined by the arising Corioliskraft, one moving air mass in the Northern Hemisphere in direction of motion to the right diverts and in the Southern Hemisphere accordingly in direction of motion to the left,whereby the strength of this diverson from the equator increases to Poland and on the wind velocity depends.
Since there are differences with the emergence and/or development, one divides Hochdruckgebiete in three categories:
An elevator high is a Hochdruckgebiet, in largeTo heights arises and therefore in elevator weather charts one represents. It is always connected with a soil low, since during the heating up of surfaces the vertical pressure gradient is lowered and the relative air pressure decrease at the soil with zunehmder height in one relative to the horizontal environment higher pressure reflects itself.One can derive therefore in the reverse case also from a soil high (also thermal high) an elevator low.
name assignment for Europe
since 1954 the names for high and Tiefdruckgebiete , which affect the weather in Central Europe , of meteorological Institut of the free University of Berlin become assigned. Since 1998 the name assignment takes place in annually changing rotation: In straight years the Hochdruckgebiete male and the Tiefdruckgebiete receive female first names, in odd years this turned around. With that “ ( see Web left) one knows at the end of of 2002 in the life called „action weather godfather a sponsorship forPressure system take over. The godfather can determine then the name, on which the low or high is to be baptized of the university, and receives detailed material such as weather charts, documents and „the life history “of the pressure system. The money comes the student Wetterbeobachtung at Institut to property.