- Our Research
Laser Remote Sensing, Atmospheric Optics, Aerosol Optics, Small Particle Scattering, Laser Spectroscopy, Non-linear Optics, Aerosol Hygroscopicity
Yu-Chieh Chen, Charles C.-K.Chou, Yu-Jen Tsai, Shih-Yu Chang, Wei-Nai Chen (2019). The hourly characteristics of aerosol chemical compositions under fog and high particle pollution events in Kinmen. ATMOSPHERIC RESEARCH, 223, 132-141.
Yu-Chieh Chen, Charles C.-K.Chou, Yu-Jen Tsai, Shih-Yu Chang, Wei-Nai Chen (2019). Impacts of holiday characteristics and number of vacation days on “holiday effect” in Taipei: Implications on ozone control strategies. ATMOSPHERIC ENVIRONMENT, 292, 357-369.
Yu-Chieh Chen, Chih-Chung Chang, Wei-Nai Chen, Yu-Jen Tsai, Shih-Yu Chang (2018). Determination of the vertical profile of aerosol chemical species in the microscale urban environment. ENVIRONMENTAL POLLUTION, 243B, 1369-1367.
P. Prasad, M.Roja Raman, M.Venkat Ratnam, Wei-Nai Chen, S. Vijaya Bhaskar, Raoa Mukund, M. Gogoid Sobhan Kumar, Kompalli, K.Sarat Kumar, S.Suresh Babu (2018). Characterization of atmospheric Black Carbon over a semi-urban site of Southeast India: Local sources and long-range transport. Atmospheric Research, 213(15), 411-421.
Cheng-Chih Lin, Wei-Nai Chen, Adrian M. Loftus, Chuan-Yao Lin, Yen-Ta Fu, Chi-Ming Peng, Ming-Cheng Yen (2017). Influences of the Long-Range Transport of Biomass-Burning Pollutants on Surface Air Quality during 7-SEAS Field Campaigns. AEROSOL AND AIR QUALITY RESEARCH, 17(10), 2595-2607.
Ta-Chih Hsiao*, Wei-Nai Chen, Wei-Cheng Ye, Neng-Huei Lin, Si-Chee Tsay, Tang-Huang Lin, Chung-Te Lee, Ming-Tung Chuang (2017). Aerosol optical properties at the Lulin Atmospheric Background Station in Taiwan and the influences of long-range transport of air pollutants. ATMOSPHERIC ENVIRONMENT, 150, 366-378.
Ta-Chih Hsiao*, Wei-Cheng Ye, Sheng-Hsiang Wang, Si-Chee Tsay, Wei-Nai Chen, Neng-Huei Lin, Chung-Te Lee, Hui-Ming Hung, Ming-Tung Chuang, Somporn Chantara (2016). Investigation of the CCN Activity, BC and UVBC Mass Concentrations of Biomass Burning Aerosols during the 2013 BASELInE Campaign. AEROSOL AND AIR QUALITY RESEARCH, 16, 2742-2756.
Sheng-Hsiang Wang · Ellsworth J. Welton · Brent N. Holben · Si-Chee Tsay · Neng-Huei Lin · David Giles · Sebastian A. Stewart · Serm Janjai · Xuan Anh Nguyen · Ta-Chih Hsiao · Wei-Nai Chen · Tang-Huang Lin · Sumaman Buntoung · Somporn Chantara · Wan Wiriya · (2015). Vertical Distribution and Columnar Optical Properties of Springtime Biomass-Burning Aerosols over Northern Indochina during 2014 7-SEAS Campaign. AEROSOL AND AIR QUALITY RESEARCH, 15(5).
I-Chun Tsai · Jen-Ping Chen · Candice Shi-Chun · Lung · Nan Li · Wei-Nai Chen · Tzung-May Fu · Chih-Chung Chang · Gong-Do Hwang · (2015). Sources and formation pathways of organic aerosol in a subtropical metropolis during summer. ATMOSPHERIC ENVIRONMENT, 117, 51-60.
I-Chun Tsai, Jen-Ping Chen*, Yi-Chiu Lin, Charles Chung-Kuang Chou, Wei-Nai Chen (2015). Numerical investigation of the coagulation mixing between dust and hygroscopic aerosol particles and its impacts. J. GEO. RES., 10.1002/2014JD022899.
Techniques & Development
Observation of Planetary Boundary Layer (Aerosol Lidar and wind Profiler) To understand the characteristics of the spatial and temporal distribution of local circulations, we combine aerosol lidar and lidar wind profiler to to investigate the characteristic of PBL. The daytime boundary layer in general was highest in summer and lowest in winter.
Vehicle-based lidar The spatial distribution of PBL and transportation characteristics of pollutants can be monitored and be traced vehicle-based lidar. The spatial distribution characteristics of aerosol and PBL will be analyzed to reveal the possible hot spots, transport patterns, and the impacts on air quality. A prototype of vehicle-based aerosol lidar has been developed by RCEC, Academia Sinica. A time-height cross-section of aerosols and clouds measured by our system to demonstrate the ability to obtain tomography of PBL
Ozone DIAL The ozone lidar developed by RCEC employs DIAL (differential absorption lidar) technique to probe vertical profile of ozone. Differential absorption lidar (DIAL) is a specialized lidar technique that can measure the profile of absolute concentration of specific molecules. DIAL systems use two laser beams with different wavelengths called the "on-line" beam and the "off line" beam. The wavelength of the on-line beam is turned to a higher absorption spectrum of the detectable molecule than the off-line wavelength, which has less absorption. Calculating the two different backscatter signals to obtain the molecule density as a function of altitude. In RCEC ozone lidar system, the “on-line” (289 nm) and “off-line” (299 nm) beams are generated from a pressurized Raman cell filling with hydrogen and methane. A time-height distribution of ozone measured by the old RCEC ozone lidar is shown in the right.