Subtropical high

Horse latitudes, or subtropical highs, are subtropic latitudes between 30° and 35°, both north and south. 

In the summer, the subtropical high pressure belt with its typical anticyclonic weather types is displaced more and more to central and northern Europe, which is reflected by the strong warming of the months from August to September by about 0.2-0.3°C. Looking at the... 

As we discussed earlier, in the equatorial region, warm air expands upward and creates a poleward pressure gradient force at the upper altitudes, where air flows poleward from the equator. This air, as it moves poleward, cools and sinks in the subtropical high-pressure belts ( — 30°) and returns to the equator at the surface. This thermally driven circulation between the equator and the subtropics is referred to as the Hadley cell. In the polar regions, a similar thermally driven circulation occurs. An airflow exists at upper levels toward the equator and at lower levels toward the poles, producing a Hadley circulation between the poles and the subpolar low-pressure regions. 

There is the relationship between the interannual variability in the index of the SCS Warm Water and the monsoon break over the SCS. The SCS Warm Water, and the warm pools in both the western equatorial Pacific and the Indian Oceans are in the same coupled system on a large scale, sharing a long period of oscillation of about 4.8 years. During the years when colder water occurs in the SCS, an atmospheric anticyclone maintains itself to the east of the Philippines in summer. A low frequency activity associated with the anticyclone results in low frequency oscillation in the precipitation field over this region, whereas the weak subtropical high over the western Pacific travels eastward in summer, which is responsible for the anomalous distribution of meridional vapor transport. 

A direct thermally-driven and zonally symmetric large- scale atmospheric circulation first proposed by George Hadley in 1735 as an explanation for the trade winds. It carries momentum, sensible heat, and potential heat from the tropics to the mid-latitudes (30 degrees). The poleward transport aloft is complemented by subsidence in the subtropical high pressure ridge and a surface return flow. The variability of this cell and the Walker cell is hypothesized to be a major factor in short-term climatic change, halocline... 

An indicator based on the pressure gradient between the quasi-stationary low pressure region and the center of a subtropical high pressure cell. A positive index corresponds to an anomalously high pressure difference between the two centers of action, statistical-dynamical models... 

Horse latitudes Regions of sinking air and light winds located around 30° to 35° latitude, the subtropical high-pressure belts. 

Trades Tropical easterly winds, northeast in the Northern Hemisphere and sontheast in the Sonthem, between the subtropical highs and the intertropical convergence. 

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