Acta Optica Sinica, Volume. 30, Issue 12, 3643(2010)
Measurement of Nitrate Radical in the Atmosphere by Direct Moonlight Passive Differential Optical Absorption Spectroscopy
Nitrate radical plays (NO3) an important role in the nighttime atmosphere. By using direct moonlight as light source, a passive differential optical absorption spetroscopy (DOAS) system with automatic star-finder system and CCD spectrometer, is developed to measure the nighttime NO3 vertical column abundance of NO3. Water vapor cross section is calculated using a line-by-line approach with considering the dependence of cross section on the temperature and water vapor amounts. By using air mass factor(AMF), the vertical column density (VCD) of NO3 radical is converted from slant column density (SCD). The max value of SCD is under 1.7×1014 molecule/cm2. As the sun rises, the observed column abundance decreases rapidly.
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Shi Peng, Xie Pinhua, Li Ang, Jiang Yu, Wu Fengcheng, Qin Min. Measurement of Nitrate Radical in the Atmosphere by Direct Moonlight Passive Differential Optical Absorption Spectroscopy[J]. Acta Optica Sinica, 2010, 30(12): 3643
Category: Spectroscopy
Received: Feb. 3, 2010
Accepted: --
Published Online: Dec. 7, 2010
The Author Email: Peng Shi (shipeng@aiofm.ac.cn)