An autumn rain and a cold describes a cold front or a warm front. What are the characteristics of

"An autumn rain and a cold" is a Chinese meteorological proverb that describes the weather conditions under the alternating influence of cold fronts and warm fronts.

Warm fronts and cold fronts are two different weather systems that have some differences in formation and characteristics.

A warm front is a front in which a warm air mass actively moves in the direction of a cold air mass, and it usually occurs in spring and summer. During the passage of a warm front, persistent precipitation will form, accompanied by weaker lightning activity. After the passage of a warm front, the temperature rises and the humidity increases.

In contrast, a cold front is a front in which a cold air mass actively moves in the direction of a warm air mass, and often occurs in autumn and winter. When a cold front passes, the temperature drops sharply, and at the same time, the wind increases, sometimes accompanied by rain or snowfall. After the passage of the cold front, the temperature will drop significantly and the weather will become drier.

In the case of "one autumn rain and one cold", it is likely to be caused by the alternating influence of cold fronts and warm fronts. In autumn, cold fronts tend to actively move in the direction of warm fronts, while warm fronts are more passive. When a warm front is caught up by a cold front, the warm air is forced to rise and cool and condense, forming rainfall.

As the cold front continues to advance, the temperature will drop further, causing the weather to become colder.

In conclusion, there is a clear difference between warm and cold fronts in terms of formation and characteristics. Warm fronts usually occur in spring and summer with weaker precipitation, while cold fronts tend to occur in autumn and winter with heavier precipitation and colder weather.

An autumn rain and a cold" describes a cold front.

After autumn, the cold air gradually increases, and the cold air moves southward to meet the warm air in front of the front to form a cold front. The cold front passes through and forms a rainy day, and the temperature drops after the cold front passes.

It is a cold front, characterized by an increase in the transit pressure of the cold front.

First of all,The areas of precipitation are different. The precipitation of the cold front is behind the front; Warm front precipitation is in front of the front; Secondly,The intensity and duration of precipitation are different, the precipitation intensity of the cold front is large and the duration is short; The intensity of warm front precipitation is small, but it lasts for a long time. In general, warm fronts provide a little longer precipitation, and then the rain gets heavier and heavier because the warm air is below, lifting the cold air.

The cold front rains more rapidly.

What is the difference between a warm front and a cold front

1. The front slope is different.

In the cold front, due to the strong force of the cold air mass, the warm air mass on it is violently lifted and the slope of the surface is large, while the warm air mass in the warm front slowly climbs above the cold air mass and pushes the front to move slowly, so the slope of the front is small.

2. The weather changes differently when it appears.

When the cold front transits, there are often windy, cloudy, rainy, snowy and other weather, after the crossing, the temperature decreases, the air pressure increases, and the weather becomes clear, that is, as the saying goes, "an autumn rain and a cold". After the transit, the position of the cold air mass is replaced by the warm air mass, the temperature rises, the air pressure drops, and the weather turns cloudy, which is the saying "a spring rain and a warm sound".

3. The characteristics are different.

The characteristics of the cold front are that the moving speed is fast, the intensity is high, the duration is short, the precipitation is behind the front, and the precipitation area is relatively narrow. The warm front is characterized by slow moving speed, low intensity, and long duration, and the precipitation is in front of the front, and the precipitation area is relatively wide.

4. The representative symbols are different.

A cold front is a triangular arrow pointing in the direction of the cold air mass, while a warm front is a semicircular arrow pointing in the direction of the warm air mass.

In addition, the frontal system is the main weather system affecting China, and most of the precipitation and some disastrous weather in China are related to frontal activities, among which the impact of cold fronts is the main one. Most of the heavy rains in northern China in summer are frontal rains formed by cold fronts. The cold wave that occurs in winter is also formed when the cold front moves southward.

Cold front: Before the crossing: warm air mass control, warm and sunny. When transiting: cloudy, windy, precipitation, cooling and other weather phenomena. After the crossing: the cold air mass replaces the warm air mass, the air pressure rises, and the temperature drops.

Warm front: before the crossing: cold air mass control, low temperature and sunny, during crossing: continuous clouds and rain. After the crossing: the warm air mass takes over the cold air mass, the temperature rises, the air pressure drops, and the weather clears.

Precipitation is formed during the passage of a warm and cold front, and the weather is clear before and after the transit, with a warm air mass above the front and a gradual rise, and a cold air mass below.

"An autumn rain and a cold" indicates that after the precipitation, the temperature drops, which is the characteristic of the cold front after the transit

Therefore, a

a. After the passage of the cold front, the temperature decreases, the air pressure increases, and the weather becomes clear, and the cold air mass strengthens after September, and the cold front begins to move, so it is correct;

b. The temperature rises after the warm front crosses, so it does not meet the theme;

c. Climate refers to the meteorological characteristics of a long period of time, and the range is large, so it does not meet the topic;

d. The example of quasi-stationary front in China is mainly the rainy weather in the middle and lower reaches of the Yangtze River in mid-June, so it does not meet the topic

Therefore, a

According to the title, "a spring rain and a warm" is about warm Bu Xiangfeng, and "an autumn-type clear rain and a cold" Zhengshan is talking about cold front, so the judgment is correct

Therefore, a

No, we have to talk about the weather brought by the cold front and the weather brought by the warm front.

Before the cold front crosses:

Controlled by a warm air mass.

Temperatures are high, the weather is sunny, and the air pressure is low.

In transit: strong winds, cooling, rainy.

The cold front will be followed by:

1 Temperature: Drop.

2. The air pressure drops first and then rises.

3. Precipitation: It will rain after the front.

4. The weather turned clear.

Warm front weather characteristics.

Before the crossing: controlled by the cold air mass, the low temperature ant banquet is clear.

In transit: Persistent rain or muffled silver haze.

After the crossing: the air pressure drops, the temperature rises, and the weather clears.

A Question Analysis:

When the cold front and warm front transit, the weather often has wind and clouds, rain and snow, etc., a right. The air pressure increases when the cold front passes, and the air pressure decreases when the warm front passes, b is wrong. Warm air is located above the front, c wrong. The warm front precipitation occurs in front of the front, and the cold front precipitation is behind the front.