Abstract
A portable Fourier Transform Spectrometer (B3M-IR) is built and used to measure atmospheric trace gases in the city of Beijing during Olympic Games in 2008. A short description of the instrument is first provided in this paper. A detailed spectral analysis is then presented. The total columns of ozone (O3), carbon monoxide (CO), methane (CH4) and nitrous oxide (N2O) are retrieved from the ground-based solar absorption spectra recorded by the B3M-IR during the Olympic Games. Lacking validation data, only the retrieved total column of O3 is compared with that retrieved by MAX-DOAS, which is deployed at the same station. The mean difference between the two methods of measurement is 6.5%, demonstrating the performance and reliability of B3M-IR.
Highlights
Since the industrialization of the last two centuries, manmade trace gases have increasingly influenced atmospheric composition and produced great impacts on the atmospheric environment and global climate change
Fourier Transfer Spectrometers (FTS) used to acquire the solar absorption spectra is named as B3M-IR, which is developed by Beijing
The clear sky solar absorption spectra were recorded with a ground-based spectrometer B3M-IR
Summary
Since the industrialization of the last two centuries, manmade trace gases have increasingly influenced atmospheric composition and produced great impacts on the atmospheric environment and global climate change. There exist several satellite products of atmospheric columns of various trace gases [2,3] Aside from these space-borne remote sensing sensors, the ground-based Fourier Transfer Spectrometers (FTS) can provide long-term data of trace gases, which can be used to validate the algorithms and products of the satellites. It is an indispensable method for atmospheric trace gas monitoring. The Chinese Academy of Sciences constructed an air quality monitoring station on the top floor of the main building of the Institute of Remote Sensing Applications.
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