[Ozone concentration inversion based on multi-reflected cell FTIR spectra and correlation analysis].

Area of Science:

• Atmospheric Chemistry
• Spectroscopy
• Environmental Monitoring

Background:

• Stratospheric ozone protects life, while ground-level ozone harms human health.
• Understanding ozone distribution and transformation is crucial for pollution control.
• Various monitoring methods exist, but novel techniques are needed for precise measurement.

Purpose of the Study:

• To evaluate a novel ozone concentration inversion method using multi-reflected cell Fourier transform infrared (FTIR) spectroscopy.
• To compare the performance of this FTIR method with other established ozone monitoring techniques.

Main Methods:

• Ozone spectra were acquired using a multi-reflected white cell FTIR spectrometer.
• Spectra were analyzed using the nonlinear least squares (NLLSQ) inversion method to determine ozone concentrations.
• Results were correlated with time series data from open path UV differential optical absorption spectroscopy and a Thermo Corporation ozone analyzer.

Main Results:

• The FTIR method provided accurate ozone concentration measurements.
• Significant correlations were found between the FTIR method and other monitoring instruments.
• While absolute concentrations varied slightly between methods, diurnal concentration variations were consistent across all instruments.

Conclusions:

• The multi-reflected cell FTIR spectroscopy method is an effective technique for measuring ozone concentrations.
• This novel FTIR-based inversion method, not previously reported in domestic literature, offers a valuable tool for ozone monitoring.
• The findings support the use of this technique for better understanding and controlling ozone pollution.