Thermal low

A thermal low is an emerging strong direct sunlight on the continent flat, stationary area of ​​low pressure with low expansion. On the heated floor, the troposphere by the sun is heated from the bottom, which leads to destabilization of the lower layers of air and vertical movements. Is favored the emergence of a heat low by low horizontal air movements. Mainly occur on heat low in arid or semihumidem climate, which is due to the almost non-existent there evaporative cooling.

A special thermal low is the monsoon low, which leads to a shift of the Intertropical Convergence Zone (ITC ) and thus influences the weather patterns spacious and leads to the monsoon rains.

Normal thermal low

Typically, the dew point and relative humidity are low. This causes the problems caused by heat low precipitation levels are low. The stability of the upper layers is limited, the vertical expansion of the low frequently also occurs deckelnde inversion. Therefore, contact with a thermal low only isolated thunderstorms on.

In a thermal low hardly developed an ordered cyclonic flow. The thermal low is usually left in the field in which it has developed, and does not suggest such great distances as a medium-sized cyclone.

Monsoon depth

Each resistant thermal low, which plays a key role in a monsoon circulation is called the monsoon low. Mainly, however, the term is for the emerging due to the heating of the Asian continent in the summer heat low centered over northern India using. In the mean air pressure distribution of the summer has this low of 995 hPa, the lowest air pressure in the Northern Hemisphere. It causes a northward shift of the Intertropical Convergence Zone