Chinese researchers measure the global carbon dioxide column concentrations of the polar regions at night.
The data was obtained from a satellite launched by China in April of last year that has an atmospheric carbon dioxide and hyperspectral aerosol detection laser radar to track carbon dioxide and atmospheric aerosols, and the accuracy of the preliminary comparison of data exceeded part per million.
China looks forward to tracking aerosols more precisely through ultra-spectrum technologies and surveillance of both aerosols and carbon in one satellite, while the country needs to support high-precision carbon distribution baseline data to achieve its commitment to peak carbon emissions and carbon neutrality.
The launch represents China's achievement of high-precision laser sensing for the world's greenhouse gases and aerosols.
However, previous measurements relied mainly on the negative spectrum, which is based on sunlight reflected from the atmosphere. Yet, the negative measurement of the solar spectrum remains limited when sunlight is not reflected.
The researchers from the Shanghai Institute of Optics and Fine Mechanics under the Chinese Academy of Sciences proposed a technique in which a laser would be released from a satellite and would be returned to the ground to allow for precise measurement.
The researchers also achieved stable high energy output from multi-band frequencies in a single laser radar.
Source: Qatar News Agency