Climatic characteristics of equatorial windless zone

When the temperature is high, the ground pressure decreases, resulting in the equatorial low pressure area. The trade winds at the intersection of subtropical high and equatorial low strengthen the vertical movement of air, but the updraft cannot feel the wind on the ground.

The weather conditions in the equatorial windless area are monotonous and regular. The continuous high temperature is about 26 degrees Celsius every month throughout the year, with the smallest annual temperature difference and no annual change. Strong convection is easy to produce cumulonimbus clouds and afternoon thunderstorms, which is the area with the most ground clouds and the most abundant rainfall. In general, the vernal equinox and autumnal equinox should be two high points on the rainfall curve; There are two low points near the summer solstice and the winter solstice. In the equatorial windless area, the pressure gradient is small, the wind is mild, the wind direction is uncertain, and there is often still calm wind. Although there were showers in the afternoon to cool off the heat, it was unbearable. On the contrary, in coastal areas, the circulation of land-sea breeze between day and night has the function of regulating temperature, which is suitable for health and life.