Is summer hot in the morning or afternoon?

The afternoon is hot, because in the summer evening, the ground releases a night's radiation, and there is not much left, while the sun has just risen, the amount of radiation is relatively small, there is more water vapor in the morning than in the afternoon, and the clouds can also absorb solar radiation.

So that the morning is not so hot, and in the afternoon, the sun radiation is very large, and there are no clouds to block the radiation directly into the earth, the earth absorbs the radiation saturated, and begins to release heat, at this time, the heaven and the earth are like a closed furnace, baking up and down.

Around 2 p.m.

The heat and cold of the weather are mainly determined by the air temperature, and the main factor affecting the air temperature is determined by the intensity of solar radiation. However, solar heat is not the main reason for the direct increase in temperature. In total, only about 14 of the heat energy directly absorbed by the air into the sunlight is absorbed by the ground, and about 43 is absorbed by the ground.

After the ground absorbs the radiant heat of the sun, it is transmitted to the air through radiation, convection, etc., which is the main reason for the increase in temperature. When the sunlight hits the ground, it heats the ground, and the heat absorbed by the ground is released to dry the air, so after the ground is heated, it will take a while to make the temperature rise. After noon, the heat emitted by the ground is still less than the heat supplied by the sun until the afternoon.

At two or three o'clock, the ground temperature can rise to the highest, and the temperature is the highest.

The afternoon is hotter than the morning, with the hottest time of the day from 11 a.m. to 3 p.m.

In summer, the temperature in the morning is still okay, and it is generally around 2 p.m. when it is the hottest.

Around three to five p.m. is the hottest time of the day.

That's a good question, it's usually the hottest time at 14 o'clock, because 14 o'clock is in the afternoon. So at a glance!

It should be between 11 a.m. and 3:00 p.m., which is the hottest time.

The reason why the afternoon is hotter than the morning in the summer is mainly due to the influence of the sun's altitude angle and the thermodynamic properties of the earth's surface.

First of all, in summer, the solar altitude angle is relatively high, and the incoming solar radiation energy is relatively strong. Therefore, in the morning hours of Zhou Hengli, when the sun rises, the angle of sunlight hitting the ground is relatively oblique, the vertical incidence of solar radiation energy is small, and the ground is relatively less heated, so the temperature is relatively low. In the afternoon, the solar altitude angle gradually increases, the vertical incidence of solar radiation energy also gradually increases, and the ground heating is relatively increased, resulting in an increase in air temperature and relatively hot afternoon.

In addition, the thermodynamic properties of the Earth's surface are also responsible for the difference in morning and afternoon temperatures. It takes a certain amount of time for the heat exchange between the ground and the atmosphere, so in the morning the solar radiation energy has not been fully transferred to the ground, and the ground has not completely absorbed the sun's radiation energy, so the temperature is relatively low. By the afternoon, the ground had absorbed the energy of solar radiation for a whole day, and the heat accumulated, causing the temperature to rise, and the afternoon was relatively hot.

In conclusion, the reason why the afternoon is hotter than the morning in the summer is due to the combined effect of the sun's altitude angle and the thermodynamic properties of the earth's surface.

There are several reasons why summer afternoons are hotter than mornings:

Sunshine time: In summer, the altitude angle of the sun is larger, the irradiation area is larger, and the sunlight shines more directly on the ground. Especially in the afternoon, when the sun is positioned closer to the ground and has more energy shining on the ground, it is easier to feel the heat.

Heat accumulation: During the morning hours, the ground and surrounding objects have not yet fully absorbed and stored the amount of solar energy, despite the exposure of sunlight. In the afternoon, after a period of absorption and accumulation, the heat in the ground and air gradually increases, making the temperature higher in the afternoon than in the morning.

Ground radiation: In the afternoon, when the ground is heated by the sun, it will release hot pants to call the disadvantages, which is the ground radiation. Ground radiation will raise the temperature of the air, further increasing the heat of the chain in the afternoon.

In summary, multiple factors such as sunshine hours, heat accumulation, and ground radiation contribute to the fact that summer afternoons are hotter than mornings.

Because the temperature is the highest in the afternoon, the imbalance between the heat income and expenditure of the atmospheric differential balance mode will cause the temperature to rise or decrease, and in a day, the maximum temperature usually appears in the afternoon, when the atmospheric heat budget is roughly balanced, the temperature is falling in the afternoon, the temperature is rising in the morning, and there is only the maximum temperature.

Morning. Of course, the morning of the beginning of autumn is cool. As the saying goes:

In early autumn, the weather is cold and frozen; In the evening of early autumn, the scorching heat kills cattle "In early autumn, autumn will be very cool, and the temperature will drop quickly, which is in obvious contrast with the closed sky next to summer. If it's in late autumn, there will be a very hot time, which is what we call the "Autumn Tiger".

If the beginning of autumn falls in the morning, the weather is cool; If the beginning of autumn is after the afternoon, the weather will be even hotter.

The beginning of autumn is the 13th of the 24 solar terms, and the first solar term of autumn is held on August 7-9 of the Gregorian calendar every year. At this time, the handle of the Big Dipper points southwest, and the Sun reaches 135° ecliptic longitude.

The two lack of vertical fourteen solar terms reflect the changes of "qi" at four o'clock, and the beginning of autumn is the node when yang energy gradually receives, yin energy grows, and gradually changes from yang to yin. The beginning of autumn, which also means that precipitation, humidity, etc., is at a turning point in the year, tending to decline or decrease; In the natural world, everything begins to grow from flourishing to maturing.

The beginning of autumn does not mean that the hot weather is over, the beginning of autumn is still in the hot period, not yet out of the heat, the second solar term of autumn (the heat) is only out of the heat, and the weather is still very hot during the early autumn.

The so-called "heat in the three dogs", there is also the saying of "one volt after autumn", and there is at least "one volt" hot weather after the beginning of autumn. According to the calculation method of "three dogs", the day of "beginning of autumn" is often still in the middle of the volcanic period, that is to say, the scorching heat has not ended, and the real coolness is generally after the Bailu solar term. The watershed between heat and coolness is not in the beginning of autumn.

After entering autumn, it transitions from the rainy and humid heat of the summer season to the dry climate of autumn with little rain. In nature, the energy of yin and yang begins to change, and all things gradually decline as the yang energy sinks.

The most noticeable change in autumn is when the leaves of the plants change from lush green to yellow, and begin to fall and the crops begin to ripen. The beginning of autumn is one of the "four seasons and eight festivals" in ancient times, and the folk have the custom of sacrificing to the god of the land and celebrating the harvest. There are also customs such as "sticking autumn fat" and "biting autumn".

Noon is hotter than in the morning, because at noon the sun is directly on the ground, and the morning sun is oblique on the ground, it can be seen that when the sun is directly illuminated, the ground and air receive more radiant heat from the sun at the same time and in the same area than when the morning sunlight is obliquely rayed, so the heat is the strongest. It is hotter at noon than in the morning.

In fact, the heat and coldness of the weather are mainly determined by the temperature of the air. The main factor affecting the air temperature is determined by the intensity of the sun's radiation, but the solar heat is not the main reason for the direct increase in air temperature. Because the heat energy directly absorbed by the air into the sunlight is only a small fraction of the total heat energy of solar radiation, most of which is absorbed by the ground.

The ground absorbs the heat of solar radiation, and then conducts it upwards to the air through heat transfer methods such as radiation and convection, which is the main reason for the increase in temperature.

In the morning and evening, when the sun is near the horizon, the sunlight is oblique, and the sunlight is in the atmosphere.

The long distance traveled and the low amount of heat energy received from the ground are the main reasons for the low temperature.

At noon, the sun is in the sky, the direct sunlight is staring at the cluster (in high latitudes, the angle of irradiation at noon is also the largest of the day), the sunlight passes vertically through the atmosphere, the distance experienced is short, the heat loss is less, the ground gets the most heat energy, and the infiltration is the main reason for the high temperature.

In addition, due to the accumulation of heat on the ground, the evening is warmer than the morning, and the hottest time of the day is 1 00 3 00 in the afternoon.

Q: What about the cool temperatures in the morning? Or is it high at noon?

The temperature at noon is higher than in the morning, is the sun earlier at this time, and the morning is closer to us? Neither is it. The main reason is that the sun hits the earth obliquely in the morning and the sun shines directly on the earth at noon.

At the same time, in the same area of Spring Mountain, the heat of direct radiation is higher than that of oblique injection. At the same time, at night, the heat of the sun shining on the ground dissipates, so it feels cool in the morning; At noon, the heat of the sun hits the ground, so it feels hot.