Why is it that within the Polar Circle, the higher the latitude, the lower the air pressure

Within the polar circle, there are 5 pressure belts on the earth, the equatorial low pressure belt, the subtropical high pressure belt, the subpolar low pressure belt, and the polar high pressure belt, of which the polar high pressure belt is within the polar power, which is the air contraction and accumulation by cold, and the high air flow converges and the mass increases, forming a high pressure belt at low altitude. In winter, the intensity increases and the range expands. In the summer, the power weakened and the scope shrank. The higher the latitude, the lower the temperature, and the higher the air pressure according to thermal expansion and contraction.

A I think this question is a bit difficult, it should be vague, many answers are possible, if it were me I would choose A, because of the high pressure control, less precipitation, and Kunlun station is more south, indicating that it is closer to the subpolar low pressure zone, so the water vapor is more sufficient, so the snowfall is greater, b The higher the latitude, the lower the air pressure, so it is excluded, c, theoretically speaking, the annual solar radiation is basically the same, although the latitude of Zhongshan station is high, but the summer sunshine time is longer (that is, the polar day is longer), plus the cloud layer of Kunlun station is thick, Therefore, it is basically the same, just like the south and north of China, the annual solar radiation is also roughly equal, d answer, the size of the wind is related to the size of the pressure difference, so it cannot be determined, and d is also excluded

Generally speaking, there is a negative correlation between air temperature and air pressure at the same latitude, that is, the higher the temperature, the lower the air pressure and the less wind.

The higher the latitude, the lower the air pressure.

The higher the latitude, the lower the air pressure. The diurnal variation of air pressure is small, generally in kilopascals, and decreases with increasing latitude.

Barometric pressure influencing factors:

The magnitude of air pressure is related to altitude, atmospheric temperature, atmospheric density, etc., and generally decreases exponentially with the increase of altitude. There are diurnal and annual variations in air pressure. During the year, the air pressure is higher in winter than in summer.

During the day, there is a maximum and a minimum of air pressure, which occurs at 9 10 o'clock and 15 16 o'clock, and a second highest and one sub-low value, which occurs at 21 22 o'clock and 3 4 o'clock, respectively. The diurnal variation of air pressure is small, generally in kilopascals, and decreases with increasing latitude.

The change of air pressure is closely related to the wind and the quality of the weather, so it is an important meteorological factor. The units of air pressure commonly used are Pa (Pa), millimeter mercury column height (mm·hg), and millibar (MB).

The conversion relationship between them is: 100 Pa = 1 mbar 3 4 mm mercury column height. The instruments commonly used to measure air pressure in meteorological observation include mercury barometer, empty box barometer, and barometer.

The pressure at which the vertical column of mercury is 760 mm high at a temperature of 0, and the standard atmospheric pressure was first measured by the Italian scientist Torricelli.

I don't think so.

It seems that the higher the altitude of the same latitude, the lower the air pressure.

Within the polar circle is the higher the latitude, the lower the pressure, the earth has a total of 5 pressure belts, the equatorial low pressure belt, the subtropical high pressure belt, the subpolar low pressure belt, the polar high pressure belt, in which the polar high pressure belt is within the polar power, is the air contracted by the cold, accumulated, and the high air flow converged, the mass increased, the formation of a high pressure zone at low altitude. In winter, the intensity increases and the range expands. In the summer, the power weakened and the scope shrank. The higher the latitude, the lower the temperature, and the higher the air pressure according to thermal expansion and contraction.