Atmospheric ethylene (C2H4) observations from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

IF 1.9 3区物理与天体物理 Q2 OPTICS

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-08-11 DOI:10.1016/j.jqsrt.2025.109603

R. Dodangodage , P.F. Bernath , C. Boone , M. Lecours , M. Schmidt

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引用次数: 0

Abstract

The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) utilizes solar occultation to collect high-resolution measurements of atmospheric trace gases as the Sun rises or sets from the satellite’s orbiting perspective. This limb-viewing geometry provides unique and vertically resolved observations of Earth’s atmosphere. In this study, we present improved retrievals of ethylene (C

_{2}

_{4}

) from ACE-FTS, offering a comprehensive analysis of its global distribution and temporal variability. The retrievals were enhanced by applying speed-dependent Voigt line shapes to minimize systematic residuals from interfering CO

_{2}

lines, enabling more complete use of the available C

_{2}

_{4}

spectral information in ACE measurements. The resulting dataset reveals notable enhancements in C

_{2}

_{4}

concentrations over high northern latitudes, particularly between 5.5 and 8.5 km altitude. Distinct seasonal variability is observed, with elevated concentrations during winter and reduced levels in summer. Furthermore, a long-term decreasing trend of −0.224 ppt/year is identified over the 2004–2024 period, indicating a gradual decline in atmospheric C

_{2}

_{4}

levels.

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大气化学实验傅立叶变换光谱仪（ACE-FTS）对大气乙烯（C2H4）的观测

大气化学实验傅立叶变换光谱仪（aces - fts）利用太阳掩星从卫星轨道角度收集太阳升起或落下时大气痕量气体的高分辨率测量数据。这种四肢观测几何结构提供了独特的垂直分辨率的地球大气观测。在这项研究中，我们提出了从ACE-FTS中改进的乙烯（C2H4）检索，提供了其全球分布和时间变化的综合分析。通过应用速度相关的Voigt线形状来减少干扰CO2线的系统残差，从而增强了检索结果，从而在ACE测量中更完整地利用了可用的C2H4光谱信息。由此产生的数据集显示，在北部高纬度地区，特别是在海拔5.5至8.5公里之间，C2H4浓度显著增强。观察到明显的季节变化，冬季浓度升高，夏季浓度降低。此外，在2004-2024年期间，确定了−0.224 ppt/年的长期下降趋势，表明大气中C2H4水平逐渐下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Quantitative Spectroscopy & Radiative Transfer 物理-光谱学

CiteScore

5.30

自引率

21.70%

发文量

273

审稿时长

58 days

期刊介绍： Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer: - Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas. - Spectral lineshape studies including models and computational algorithms. - Atmospheric spectroscopy. - Theoretical and experimental aspects of light scattering. - Application of light scattering in particle characterization and remote sensing. - Application of light scattering in biological sciences and medicine. - Radiative transfer in absorbing, emitting, and scattering media. - Radiative transfer in stochastic media.