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Optimization of Procedure for Determining Chlorine Nitrate in the Atmosphere from Ground-Based Spectroscopic Measurements
Journal of Applied Spectroscopy ( IF 0.7 ) Pub Date : 2020-05-21 , DOI: 10.1007/s10812-020-01002-5
Y. A. Virolainen , A. V. Polyakov , O. Kirner

The procedure for determining the total content of chlorine nitrate (ClONO2) from ground-based measurements of the solar radiation spectra on a Bruker 125HR Fourier spectrometer at the St. Petersburg station (59.88oN, 29.82oE, 20 m above sea level) of the international observational network NDACC is examined. The method was applied to spectra measured in the period from 2009 to 2019, and the results were compared with calculations by the EMAC chemistry-climate model. Good qualitative and quantitative agreement was obtained between the experimental data and the results of numerical modeling. For the period 2009–2017 the average mismatch between model and experiment was 3%, the standard deviation was 43%, and the correlation coefficient was 0.79 ± 0.02, which indicates an adequate description of the variability of the total ClONO2 content by the model. Assessment of the linear trend of the total ClONO2 content showed a significant decrease in the total chlorine nitrate content in the atmosphere over St. Petersburg according both to the ground-based measurements (–2.3 ± 1.9% per year) and to the model (–1.2 ± 0.4% per year).

中文翻译:

地基光谱法测定大气中硝酸氯的方法的优化

通过在圣彼得堡站的布鲁克125HR傅里叶光谱仪上对太阳辐射光谱进行地面测量来确定硝酸氯(ClONO 2)总含量的过程(北纬59.88 o,南纬29.82 oE,国际观测网络NDACC海拔20 m)。将该方法应用于2009年至2019年期间测得的光谱,并将结果与​​EMAC化学-气候模型的计算结果进行了比较。实验数据与数值模拟结果之间取得了良好的定性和定量一致性。在2009年至2017年期间,模型与实验之间的平均失配率为3%,标准差为43%,相关系数为0.79±0.02,这充分说明了模型中总ClONO 2含量的变化。评估总ClONO 2的线性趋势 根据地面测量值(每年–2.3±1.9%)和模型(每年–1.2±0.4%),圣彼得堡市大气中的总硝酸氯含量显着降低。
更新日期:2020-05-21
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