천문우주과학과

일시:  2020년 2월 4일 화요일 세미나실(기2514호)

연사:  박상서 교수님(울산과학기술연합대학교)

제목: Estimation of trace gas amount using method of Differential Optical Absorption Spectroscopy (DOAS)

초록:  

Differential Optical Absorption Spectroscopy (DOAS) is the process of estimating column amount of absorbing species from measurement of hyper-spectral radiation. In the field of atmospheric sciences, the DOAS method is widely used to retrieve the trace gas amounts in the atmosphere since middle of 1970s (Noxon, 1975). Basic principle of DOAS is separating the radiance signal for absorption from the scattering radiance within specific wavelength range. After identifying the absorption signal, the DOAS method allows the simultaneous calculation of the absorption of several gaseous species. 

Based on the DOAS method, several kinds of ground-based optical instruments have been developed to retrieve the trace gas amounts relating to the air quality. Furthermore, the several atmospheric environment satellites have been recently launched in Korea, Europe, and U.S. This seminar will be introduced the retrieval technique of DOAS method to adopt the several observation techniques in the atmospheric science fields after introducing the basic principle of DOAS method. In addition, the seminar will be also introduced to the application studies based on the satellite measurements of trace gas from DOAS method.