Urgent!! On the question of temperature inversion in geography

Under normal circumstances, the tropospheric atmospheric air temperature decreases with altitude, while inversion is an abnormal phenomenon in which the temperature increases while the altitude increases. Therefore, the temperature inversion phenomenon must be lower than the temperature of the bottom layer.

The temperature inversion phenomenon mostly occurs in the areas affected by the cold front. Because when the cold and warm fronts meet, the cold air mass has high air pressure and will be located under the warm air mass, forming a temperature inversion in the frontal transition zone.

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In general, the temperature of the atmosphere decreases with increasing altitude, and for every 100 meters of ascent, the temperature decreases by about . That is to say, below a few thousand meters, the temperature of the lower atmosphere is always high and the density is small, and the temperature of the upper atmosphere is low and the density is high, which makes it appear "top-heavy". This atmospheric stratification is prone to tumbling up and down, i.e., "convection" movements.

However, under certain weather conditions, the atmospheric structure above the ground will have an abnormal phenomenon of air temperature rising with the increase of altitude, resulting in atmospheric stratification "heavy feet and light head", which is called "inversion" by gas scientists, and the atmosphere where temperature inversion occurs is called "inversion layer". There are several reasons for the phenomenon of "temperature inversion". For winter in China, the temperature of the near-surface layer drops rapidly due to the radiative cooling of the ground.

When the cold snap hits, the ground is controlled by the cold air mass, the weather is sunny and the wind is low, especially at night, the ground heat is emitted to the high altitude (radiation), so that the temperature near the ground drops rapidly, and the temperature of the upper atmosphere drops slowly, resulting in the so-called "inversion" "phenomenon" of warm and cold.

Temperature inversion generally refers to the increase in temperature with altitude, but strictly less than 6 km.

There is a warm air mass on the front and a cold air mass below, so the temperature increases with altitude.

Both questions are true. This is the definition of temperature inversion

1. In the C figure, "the vertical temperature gradient (100 meters) shows that the figure is not given the air temperature, but the change value of the air temperature after rising one unit elevation, plus or minus means that the temperature rises or decreases, as long as the vertical decline rate is equal to or greater than zero, it is a temperature inversion phenomenon. When the temperature inversion phenomenon occurs in the atmosphere, the convective movement is weakened, which is not conducive to the purification of pollutants. Therefore, the highest period is 19 22 o'clock.

Answer: c.

b is incorrect.

At night, the slopes of the mountains cool down quickly, the cold air sinks and the hot air rises, the top is hot and the bottom is cold, which is the temperature inversion. After the formation of the inversion layer, the air stratification is stable, and there is almost no upward movement of the air, which is not easy to form clouds and cause rain. The upper air temperature is high, and the water vapor is not easy to condense and not easy to form precipitation.