How is precipitation calculated?

How is the precipitation calculated as follows:

Precipitation refers to the total amount of precipitation in a certain area in a specific period of time. There are many methods to calculate precipitation, and each method has a specific application scenario.

1. Trapping method: use containers with a specific area to collect the precipitation in a certain period of time, then divide the collected precipitation by the area of the containers to get the precipitation per unit area, and then multiply the precipitation per unit area by the total area of the area to get the total precipitation.

for example, if you put a vessel with an area of 1 square centimeters in a city and collect the precipitation for one day, you can get that the precipitation per unit area is 1 mm, and the total area of the city is 1 square kilometers, so the total precipitation is 1 square kilometers multiplied by 1 mm, that is, 1 million cubic meters of precipitation.

2. Radar reflectivity method: the reflectivity is measured by meteorological radar, and the precipitation is determined by calculating the change of reflectivity. For example, in the monitoring range of weather radar, when a certain degree of echo signal is detected, the precipitation can be calculated according to the intensity and duration of the echo signal.

3. satellite remote sensing method: using satellite remote sensing technology, the precipitation is determined by analyzing the reflection and radiation data of clouds. For example, satellite remote sensing technology can be used to predict extreme weather such as tropical cyclones and calculate the precipitation in the predicted area.

4. numerical simulation method: numerical simulation technology is used to simulate the physical process in the whole atmospheric environment, so as to predict the precipitation. For example, numerical simulation technology can be used to predict extreme weather such as typhoon and rainstorm, and calculate the precipitation in the predicted area.

extension

1. Why does precipitation affect agricultural production?

A: Precipitation is an important factor in agricultural production, which directly affects the growth and development of crops. Too much or too little precipitation will adversely affect crop growth, thus affecting agricultural production.

2. what does the seasonal distribution of precipitation mean?

a: the seasonal distribution of precipitation refers to the proportion of precipitation in different seasons to the total precipitation in a year. The seasonal distribution of precipitation in different areas is different, which has an important impact on the climate and ecological environment in this area.

a: various methods can be used to forecast precipitation, such as weather radar, satellite remote sensing and numerical simulation. These methods are all based on the processing and analysis of meteorological data to predict the precipitation in the future.

4. what is the precipitation intensity?

a: precipitation intensity refers to the precipitation in a certain area in a unit time, usually in millimeters/hours or inches/hours. The intensity of precipitation directly affects the impact of rainfall on this area.