[16a-PA06-1~13] 3.7 Optical measurement, instrumentation, and sensor (formerly 3.8)

[16a-PA06-7] Raman scattering signal measurements of CO₂ for development of marine water lidar

〇(M1)Kakeru Ito¹, Ken-Ichi Suzuki², Koichi Tezuka², Tatsuo Shiina¹ (1.Chiba Univ., 2.Trimatiz)

Keywords:Raman scattering, Lidar

With global warming, large-scale reduction of greenhouse gases such as CCS(Carbon Capture and Storage) is needed. However the impact assessment on the underwater environment is not fully understood. In this study, basic experiments using CO₂ gas dissolved in pure water were conducted for the purpose of developing the Raman lidar. Although CO₂ Raman signals can be obtained from previous studies, it is necessary to improve the sensitivity by an order of magnitude for CO₂ measurements in seawater. In this report, we describe the light source power dependence of the Raman signal intensity when CO2 gas is dissolved in pure water.