What do the different colors on the satellite cloud map mean?
In the satellite cloud image
green represents land. If you see green, it means the weather is sunny.
Blue represents the ocean, and seeing blue means the weather is sunny.
White indicates rainy areas. The whiter the color, the thicker the clouds. The brighter the white, the more obvious the precipitation, and the darker the white, the more overcast.
Satellite cloud images are top-down images of cloud cover and surface features on the Earth observed by meteorological satellites. The cloud images received mainly include infrared cloud images, visible light cloud images and water vapor images.
Satellite cloud images can be used to identify different weather systems, determine their locations, estimate their intensity and development trends, and provide a basis for weather analysis and weather forecasting. In areas such as oceans, deserts, and plateaus that lack meteorological observation stations, the data provided by satellite cloud images make up for the lack of conventional detection data and play an important role in improving forecast accuracy.
Extended information:
According to the different instruments and devices on the satellite, satellite cloud images can be divided into two categories: one is the cloud image taken by the TV camera on the satellite, that is, the TV cloud image; One type is the cloud image obtained by scanning the earth's atmosphere with a radiometer. On the TV cloud map, the black and white degree of the image indicates the reflectivity of the ground surface and various types of clouds to solar radiation. White indicates the strongest reflectivity, and black indicates the weakest reflectivity.
Visible light satellite cloud images are made using the principle of cloud tops reflecting sunlight, so they can only be photographed during the day. Visible light satellite cloud images can show the surface and thickness of cloud cover. Thick clouds have strong reflective capabilities and will appear bright white on visible light satellite cloud images, while thinner clouds will appear dark gray. They can also be combined with infrared satellite cloud images to create produce a more accurate analysis.
Visible light cloud image is a satellite cloud image that is sensed by the scanning radiometer on the meteorological satellite (in the early days, a TV camera was used) using the visible light channel and sent to the ground station. The brightness and darkness on the image reflect the shape of the clouds. The strength of the albedo.
Visible light cloud images have been widely used in studying the movement and development of cloud groups and cloud systems, and in monitoring the occurrence, development and movement of typhoons and other weather systems, and have achieved good results. However, since cloud images are taken using the visible light band, their brightness and hue depend on the nature of the clouds and the sun's altitude, and they cannot be taken at night, so they are subject to certain limitations.
Baidu Encyclopedia - Satellite Cloud Image