Regarding the weather, the experts came in to help me! 15

It will still be cold after the Spring Festival, the key is how you keep warm!

1.Monsoon. Under the influence of the monsoon, Yunnan Province has a significant dry season and rainy season, with about 85% of the annual rainfall concentrated in the rainy season from May to October, while November to April of the following year is the dry season, with little precipitation and high evaporation. It's the dry season.

2.Terrain. The plateau topography, especially several north-south mountain ranges, blocks the airflow, resulting in extremely low water content in the air, making it difficult to form effective rainfall.

Moreover, Yunnan is a typical mountainous province, with high altitude and unusually rugged, and it is too difficult to transfer water from the plain areas at lower altitudes.

3.Human activity. Due to the destruction of vegetation year after year, the water conservation capacity has been declining year by year, and the climate regulation capacity has been deteriorating, so the spring drought in Yunnan has become more and more serious year by year.

Precipitation in the southern branch trough.

Post-high-pressure ridge drought.

Personally, I think it may be necessary to brush up on geography upstairs, and Guangzhou is much closer to the Tropic of Cancer than Beijing.

The reason why the temperature in the eastern part of our country is not much different in summer, but the destruction is that the temperature difference in winter is very obvious because of the high monsoon weather unique to our country.

In summer, the humid and warm monsoon from the Pacific Ocean will bring heating leakage and water vapor to the eastern part of China, which is the reason for the rain and heat in the eastern part of the country.

But in winter, the center of Asia will form a Mongolian high, and if the landlord listens to the weather forecast, he will constantly hear cold air moving south. I found one who is more professional than me in meteorology for the landlord's reference.

Because Guangzhou is closer to the Tropic of Cancer.

Modern weather forecasting has five components:

Collect data. The most traditional data is data on air pressure, air temperature, wind speed, wind direction, humidity, etc., collected on the ground or at sea through professionals, hobbyists, automatic weather stations or buoys. The World Meteorological Organization coordinates the timing of these data collections and sets standards. These measurements are either hourly (METAR) or every six hours (synop).

Using a weather balloon, meteorologists can also collect air temperatures, humidity, and wind values in the sky. Weather balloons can rise all the way to the tropopause.

Data from meteorological satellites is becoming increasingly important. Meteorological satellites can collect data from all over the world. Their visible light** helps meteorologists to see how clouds are developing.

Their infrared data can be used to collect temperatures on the ground and at the top of the clouds. By monitoring the development of the cloud, you can collect wind speed and direction at the edge of the cloud. However, because the accuracy and resolution of meteorological satellites are not good enough, ground-based data is still very important.

Weather radars can provide information on the area and intensity of precipitation. Doppler radar can also determine wind speed and direction.

Data assimilation. In the process of data assimilation, the collected data is combined with the numerical models used to make forecasts to produce meteorological analysis. The result is the best estimate of the current state of the atmosphere, which is a three-dimensional representation of temperature, humidity, air pressure, and wind speed and direction.

Data weather forecast.

Digital weather forecasting is the use of computers to simulate the atmosphere. It uses the results of data assimilation as its starting point to calculate the change of the atmosphere over time based on the results of today's physics and fluid mechanics. Due to the complexity of the equations of fluid mechanics, digital weather forecasting is only possible using supercomputers.

The output of this model calculation is the basis for weather forecasting.

Output processing. The original output of the model calculation generally needs to be processed before it can become a weather forecast. These processes include the use of statistical principles to eliminate known biases in the model, or to make adjustments based on calculations from other models.

In the past, meteorologists had to do the work themselves, but today weather forecasts of more than 24 hours are mainly based on the use of many different models and the synthesis of their results. Meteorologists must also analyze the forecasted model data so that the end user can understand it. In addition, models for weather forecasting are generally not particularly high-resolution.

Local meteorologists must also make local weather forecasts more accurate through local experience involving regional influences. However, as weather forecasting models continue to be refined, this workload is getting smaller and smaller.

Presentation: For the end user, the presentation of the weather forecast is the most important thing in the whole process. This can only be done by knowing what information the end user needs and how to communicate that information to the end user in an understandable way.

This is a ridge of high pressure in the western Pacific, the legend says that the perennial line is solid, in 2010 it is a dotted line, and it is in August, so it should be a ridge of high pressure hovering.

If it is a cold wind transit, the direction of the solid and dashed lines that should appear should be from the land to the sea, so c is not correct.

Children's shoes Where did the cold front come from in the month、、Or in the low latitudes、、