What does green mean on satellite cloud images?

On the satellite cloud map, green represents land.

1. Observation

1. If the surface of the earth is a clear sky area, what the satellite observes is the infrared radiation information emitted from the ground to space, which appears green on the satellite cloud map. The darker the green, the stronger the ground radiation and the clearer the weather.

2. When the sky above a certain place is covered with clouds and rain, what the satellite observes is the infrared radiation emitted from the cloud tops to space, which appears as white or off-white. White means that the ground radiation is very weak, the temperature is very low, the cloud system is very thick, and the rainfall intensity is very high. The transition zone between the clear sky area and the cloud and rain area is usually covered by dark gray, gray, and light gray cloud systems, indicating that there are clouds of different thicknesses without obvious precipitation.

3. On satellite cloud images displayed on TV, the surface and ocean are often represented by green and blue.

2. Introduction

Satellite cloud images are images of cloud coverage and surface features on the Earth observed from top to bottom by meteorological satellites. The cloud images currently 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. It makes up for the shortcomings of conventional detection data.

Satellite observations of the Earth have become an indispensable source of information in today's world. Meteorological satellites take pictures of the earth's surface from different locations in space, and a large amount of observation data is transmitted back to ground workstations through satellites; they are then synthesized into exquisite cloud photos. People can receive both visible light cloud images and satellite photos of other bands by using appropriate photosensitive instruments.