What Is the Mesosphere?
The mesosphere is also called the mesosphere, which refers to the atmosphere from the top of the stratosphere to 85 kilometers. Due to the low ozone content in this layer, the short-wave solar radiation that can be directly absorbed by nitrogen and oxygen has been mostly absorbed by the upper atmosphere, so the temperature vertical decline rate is large, and the convection movement is strong. [1]
- The middle layer is also called the middle layer. from
- The earth's atmosphere can be divided into several layers according to its basic characteristics, but there are different layering methods according to different characteristics. From the earth's surface upward, the air becomes thinner with increasing altitude. The upper bound of the atmosphere can extend to an altitude of 2,000 to 3,000 kilometers. There are obvious differences in the physical properties of the atmosphere in the vertical direction.
- From
- Relative to the middle layer
- The middle tier is cooler in summer than in winter. This is because in winter, the atmosphere
- The middle layer does not occur high.
- In the middle layer, the temperature drops as the altitude rises. The middle layer overlaps the lower part of the ionosphere. In a space 50 to 800 kilometers from the ground, thin air molecules form ions under strong sunlight. The ionosphere is like a mirror, which reflects the radio waves from the broadcasting station back to the ground so that we can receive the broadcast.
- There are many interesting phenomena in the atmosphere, and the different charms emitted by each layer, such as the luminous clouds in the middle layer, the abnormal weather in summer and winter ... except for the troposphere and stratosphere, the middle layer, the warm layer, and The layers are also inseparable from our lives.
- Rayleigh scattering lidar is capable of detecting the vertical distribution of atmospheric temperature in the range of 22-60 km.
- Rayleigh scattering lidar is suitable for detecting the atmospheric temperature distribution in the lower layer of the middle layer. The main principle is: that the atmospheric echoes in the lower atmosphere of the middle layer are mainly molecular Rayleigh scattering signals, and the scattering signals of aerosol particles are ignored; assuming that the atmospheric density at a certain height is known, the atmospheric density profile can be obtained; combined with ideals The equation of state of the gas and the equation of atmospheric statics are used to determine the atmospheric temperature. [2]