Combining LIDAR, all-sky camera, and ECMWF-ERA5 reanalysis to investigate contrail formation and evolution over Clermont-Ferrand, France on June 2, 2023

IF 4.4 2区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmospheric Research Pub Date : 2025-09-22 DOI:10.1016/j.atmosres.2025.108500

Sidy Diarra , Jean-Luc Baray , Nadège Montoux , Patrick Fréville , Frédéric Peyrin , Philippe Cacault , William Boucher , Philippe Keckhut

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引用次数: 0

Abstract

Contrails formed by aircraft in the upper troposphere contribute to anthropogenic climate forcing. However, the conditions driving their formation and persistence remain incompletely understood. This study combines a ACTRIS/EARLINET ground-based LIDAR, all-sky camera imagery, ADS-B aircraft tracking, and ECMWF-ERA5 reanalysis to analyse contrails formation and evolution over Clermont-Ferrand, France, on June 2, 2023. Twelve contrails are documented throughout the day, including five persistent and seven non-persistent contrails. Persistent contrails formed at 10.36 km altitude or lower are observed under ice-supersaturated conditions (relative humidity with respect to ice, RHi > 105 %) and at temperatures between 217 and 223 K. Non-persistent contrails produced by higher altitudes aircrafts, are associated with lower RHi mostly below 100 % and colder temperatures (214–217 K). The horizontal persistent contrail widths range from 0.53 ± 0.10 to 1.60 ± 0.44 km (all-sky camera estimation) and 0.35 ± 0.14 to 1.90 ± 0.32 km (LIDAR estimation), and vertical extents varied from 340 ± 10 to 440 ± 20 m. The optical properties of these contrails have also been estimated by LIDAR. Aerosol backscatter coefficient vary from 0.02 to 0.05 km⁻¹ sr⁻¹, scattering ratios from 8 to 20, volume linear depolarization from 0.13 to 0.24 and particle linear depolarization from 0.17 to 0.45. The maximum contrail observation duration by camera is 180 min. The study highlights the potential of ground-based remote sensing for contrail monitoring.

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2023年6月2日，结合激光雷达、全天相机和ECMWF-ERA5再分析，研究法国克莱蒙费朗上空的尾迹形成和演变

飞机在对流层上层形成的尾迹有助于人为气候强迫。然而，驱动它们形成和持续存在的条件仍不完全清楚。该研究结合了ACTRIS/EARLINET地面激光雷达、全天相机图像、ADS-B飞机跟踪和ECMWF-ERA5再分析，分析了2023年6月2日法国克莱蒙费朗上空的尾迹形成和演变。全天记录了12条尾迹，包括5条持续尾迹和7条非持续尾迹。在冰过饱和条件下（相对于冰的相对湿度为105%），温度在217至223 K之间，在10.36千米或更低的高度上观察到持续的尾迹。高海拔飞机产生的非持续性尾迹与低RHi（大部分低于100%）和较冷的温度（214-217 K）有关。水平持续尾迹宽度范围为0.53±0.10 ~ 1.60±0.44 km（全天相机估计）和0.35±0.14 ~ 1.90±0.32 km（激光雷达估计），垂直范围为340±10 ~ 440±20 m。这些尾迹的光学特性也被激光雷达估计出来了。气溶胶后向散射系数为0.02 ~ 0.05 km−1 sr−1，散射比为8 ~ 20，体积线性去极化为0.13 ~ 0.24，粒子线性去极化为0.17 ~ 0.45。用相机观察航迹的最长时间为180分钟。这项研究强调了地面遥感在航迹监测方面的潜力。

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来源期刊

Atmospheric Research 地学-气象与大气科学

CiteScore

9.40

自引率

10.90%

发文量

460

审稿时长

47 days

期刊介绍： The journal publishes scientific papers (research papers, review articles, letters and notes) dealing with the part of the atmosphere where meteorological events occur. Attention is given to all processes extending from the earth surface to the tropopause, but special emphasis continues to be devoted to the physics of clouds, mesoscale meteorology and air pollution, i.e. atmospheric aerosols; microphysical processes; cloud dynamics and thermodynamics; numerical simulation, climatology, climate change and weather modification.