Abstract—

Based on the analysis of high-resolution FTIR spectra recorded at the atmospheric monitoring station of St. Petersburg State University during 2009–2022, a possibility of deriving the NO₂ tropospheric column from ground-based measurements of direct solar radiation in the mid-IR range is studied. The best agreement (correlation coefficient r = 0.68) with simultaneous DOAS measurements of the NO₂ tropospheric column at the same monitoring station is provided by a retrieval technique based on the use of the spectral range 2914.30–2914.85 cm⁻¹ in combination with the Tikhonov–Phillips regularization. It is shown that FTIR measurements make it possible to reliably detect high levels of tropospheric NO₂ at the SPbSU monitoring station. Our results can be used at the FTIR stations of the NDACC network for significant expansion of the geography of tropospheric NO₂ monitoring.

中文翻译：

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从直接太阳辐射的地面 FTIR 测量中反演 NO2 对流层柱

摘要-

根据对圣彼得堡国立大学大气监测站 2009-2022 年记录的高分辨率 FTIR 光谱的分析，通过中红外直接太阳辐射的地面测量推导出 NO ₂对流层柱的可能性范围进行了研究。基于使用光谱范围 2914.30–2914.85 cm ^-1的反演技术与 Tikhonov 相结合，提供了与同一监测站的 NO ₂对流层柱的同时 DOAS 测量的最佳一致性（相关系数r = 0.68）。 ——菲利普斯正则化。结果表明，FTIR 测量可以可靠地检测SPbSU 监测站对流层 NO ₂的高浓度。我们的结果可用于 NDACC 网络的 FTIR 站，以显着扩展对流层 NO ₂监测的地理范围。