Raman Lidar for Equipping Carbon Polygons

This paper analyzes the possibility of using lidar technologies for remote sensing of climate-active gases at the carbon polygons for background concentration level monitoring. The computer simulation of the lidar formula to measure the concentrations of carbon cycle molecules above the background level (ranging from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4.1· 10¹⁵</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1.0· 10²⁵</tex> molecules/m 3 ) using Raman lidar at the distance of no less than 100 m in the photon counting mode was performed. The simulation results were used to determine the optimum parameters for the lidars. It is shown that probing using the aforementioned lidar at the 405 nm laser radiation wavelength can detect the concentration of all climate-active gases molecules in the gas mixture given their content in the atmosphere for the measuring time range from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.77 \</tex> to 1009 s. This technology significantly alleviates the hardware and metrological requirements to the instruments at the carbon polygons, improves consistency of results and allows unification of their organization.