CO2-monitoring sat launched
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China launched its first carbon dioxide monitoring satellite early Thursday. The  experts said it will contribute to global research on climate change and also enable the nation to play a bigger role in this field.
The satellite TanSat was sent into orbit 700 kilometers above the Earth and will monitor the concentration, distribution and flow of carbon dioxide in the atmosphere. On a three-year mission, TanSat will thoroughly examine global carbon dioxide levels every 16 days, accurate to at least 4 parts per million.
China is the third country after Japan and the US to launch such a satellite. But the satellite sent by China has a higher accuracy than the one launched by Japan and compared with the US satellite, it carried a cloud and aerosol detectors that could minimize interference and make the detection more accurate.
China will have a bigger role in global climate negotiations, as the satellite can provide more first-hand data about global greenhouse gas emissions. Though many countries are reducing greenhouse gas emissions, calculating how much they are actually reducing is difficult, and ground-based monitoring cannot collect accurate data on a global scale, satellites offer the best means of measuring CO2, said experts.